pareto-analysis-js

Pareto Analysis Report

Generated: 2025-10-05T22:40:04.478Z

Aggregate Analysis Summary

Dataset Overview:

• Total repositories analyzed: 56
• Total features in JavaScript catalog: 125
• Analysis covers: totals, presence, perKLOC metrics

Total Occurrences - Aggregate Results

• 80% of totals achieved with 20 features (16.0% of catalog)
• 90% of totals achieved with 32 features (25.6% of catalog)
• 95% of totals achieved with 44 features (35.2% of catalog)

File Presence - Aggregate Results

• 80% of presence achieved with 33 features (26.4% of catalog)
• 90% of presence achieved with 49 features (39.2% of catalog)
• 95% of presence achieved with 63 features (50.4% of catalog)

Per 1000 Lines of Code - Aggregate Results

• 80% of perKLOC achieved with 21 features (16.8% of catalog)
• 90% of perKLOC achieved with 35 features (28.0% of catalog)
• 95% of perKLOC achieved with 48 features (38.4% of catalog)

---

Total Occurrences

Summary:

• Repositories analyzed: 56
• Features with data: 113
• Total occurrences: 7462347

Top 7 Features

Rank	Feature	Count	%	Cumulative %
1	binaryOp_/	1298966	17.41%	17.41%
2	labels	782489	10.49%	27.89%
3	assignOp_=	781728	10.48%	38.37%
4	functions	460652	6.17%	44.54%
5	return	334764	4.49%	49.03%
6	if	317572	4.26%	53.28%
7	binaryOp_+	275800	3.70%	56.98%

Pareto Analysis

80% of usage comes from 20 features (16.0% of catalog): binaryOp_/, labels, assignOp_=, functions, return, if, binaryOp_+, arrowFunctions, binaryOp_*, binaryOp_|, binaryOp_===, awaitExpressions, logicalAND, binaryOp_-, templateLiterals, binaryOp_», exportDecls_named, ternary, importDecls, binaryOp_<

90% of usage comes from 32 features (25.6% of catalog): binaryOp_/, labels, assignOp_=, functions, return, if, binaryOp_+, arrowFunctions, binaryOp_*, binaryOp_|, binaryOp_===, awaitExpressions, logicalAND, binaryOp_-, templateLiterals, binaryOp_», exportDecls_named, ternary, importDecls, binaryOp_<, logicalOR, classMethods, binaryOp_!==, binaryOp_>, switchCases, asyncFunctions, classFields, interpolatedTemplates, updateOp_++, jsxElements, spreadElement, classDecls

95% of usage comes from 44 features (35.2% of catalog): binaryOp_/, labels, assignOp_=, functions, return, if, binaryOp_+, arrowFunctions, binaryOp_*, binaryOp_|, binaryOp_===, awaitExpressions, logicalAND, binaryOp_-, templateLiterals, binaryOp_», exportDecls_named, ternary, importDecls, binaryOp_<, logicalOR, classMethods, binaryOp_!==, binaryOp_>, switchCases, asyncFunctions, classFields, interpolatedTemplates, updateOp_++, jsxElements, spreadElement, classDecls, break, forClassic, binaryOp_==, binaryOp_»>, throw, destructuringObject, binaryOp_&, assignOp_+=, tsAsExpression, binaryOp_«, binaryOp_%, updateOp_–

Catalog Usage Summary

Total features in JavaScript catalog: 125

Usage Threshold	Features Required	Catalog Percentage
80%	20	16.0%
90%	32	25.6%
95%	44	35.2%

Repository Breakdown

core-js

• Features Total: 125
• Features Observed: 87
• Catalog Usage: 69.6%

Top 7 Features:

1. assignOp_=: 7020
2. arrowFunctions: 5482
3. functions: 4697
4. return: 4103
5. if: 3408
6. binaryOp_===: 1884
7. logicalAND: 1465

---

underscore

• Features Total: 125
• Features Observed: 54
• Catalog Usage: 43.2%

Top 7 Features:

1. functions: 1939
2. return: 1838
3. assignOp_=: 1726
4. if: 889
5. logicalAND: 585
6. ternary: 490
7. logicalOR: 478

---

three.js

• Features Total: 125
• Features Observed: 100
• Catalog Usage: 80.0%

Top 7 Features:

1. assignOp_=: 190570

2. **binaryOp_

   **: 109471

3. binaryOp_+: 85920
4. binaryOp_»: 78069
5. if: 50187
6. functions: 23790
7. return: 22342

---

js-yaml

• Features Total: 125
• Features Observed: 46
• Catalog Usage: 36.8%

Top 7 Features:

1. functions: 358
2. assignOp_=: 197
3. binaryOp_+: 182
4. return: 104
5. binaryOp_===: 65
6. if: 64
7. templateLiterals: 44

---

chalk

• Features Total: 125
• Features Observed: 45
• Catalog Usage: 36.0%

Top 7 Features:

1. arrowFunctions: 55
2. templateLiterals: 49
3. taggedTemplates: 48
4. assignOp_=: 40
5. importDecls: 27
6. binaryOp_+: 26
7. return: 25

---

css-loader

• Features Total: 125
• Features Observed: 56
• Catalog Usage: 44.8%

Top 7 Features:

1. templateLiterals: 3999
2. assignOp_=: 2282
3. arrowFunctions: 383
4. importDecls: 259
5. if: 258
6. awaitExpressions: 257
7. asyncFunctions: 255

---

eslint

• Features Total: 125
• Features Observed: 95
• Catalog Usage: 76.0%

Top 7 Features:

1. assignOp_=: 3031
2. if: 2790
3. return: 1878
4. functions: 1874
5. binaryOp_===: 1264
6. logicalAND: 1064
7. logicalOR: 659

---

shelljs

• Features Total: 125
• Features Observed: 54
• Catalog Usage: 43.2%

Top 7 Features:

1. arrowFunctions: 756
2. templateLiterals: 623
3. interpolatedTemplates: 614
4. assignOp_=: 470
5. if: 372
6. binaryOp_+: 360
7. functions: 195

---

react

• Features Total: 125
• Features Observed: 109
• Catalog Usage: 87.2%

Top 7 Features:

1. assignOp_=: 31298
2. arrowFunctions: 26049
3. jsxElements: 24810
4. return: 23023
5. functions: 22801
6. if: 21556
7. binaryOp_<: 14365

---

preact

• Features Total: 125
• Features Observed: 85
• Catalog Usage: 68.0%

Top 7 Features:

1. jsxElements: 4596
2. arrowFunctions: 3431
3. assignOp_=: 1857
4. functions: 1730
5. return: 1597
6. if: 769
7. classMethods: 766

---

meteor

• Features Total: 125
• Features Observed: 105
• Catalog Usage: 84.0%

Top 7 Features:

1. assignOp_=: 18545
2. functions: 13904
3. if: 13592
4. return: 10947
5. awaitExpressions: 8165
6. binaryOp_+: 6294
7. arrowFunctions: 4282

---

vue

• Features Total: 125
• Features Observed: 92
• Catalog Usage: 73.6%

Top 7 Features:

1. arrowFunctions: 8087
2. templateLiterals: 7215
3. assignOp_=: 4470
4. if: 4005
5. return: 3602
6. functions: 3095
7. awaitExpressions: 2599

---

karma

• Features Total: 125
• Features Observed: 63
• Catalog Usage: 50.4%

Top 7 Features:

1. arrowFunctions: 1232
2. assignOp_=: 1159
3. functions: 573
4. return: 449
5. if: 328
6. binaryOp_+: 239
7. binaryOp_===: 121

---

winston

• Features Total: 125
• Features Observed: 42
• Catalog Usage: 33.6%

Top 7 Features:

1. functions: 378
2. arrowFunctions: 138
3. assignOp_=: 109
4. awaitExpressions: 73
5. templateLiterals: 51
6. return: 42
7. interpolatedTemplates: 35

---

express

• Features Total: 125
• Features Observed: 33
• Catalog Usage: 26.4%

Top 7 Features:

1. functions: 2954
2. assignOp_=: 310
3. binaryOp_+: 286
4. return: 202
5. if: 192
6. binaryOp_===: 54
7. updateOp_++: 49

---

jasmine

• Features Total: 125
• Features Observed: 74
• Catalog Usage: 59.2%

Top 7 Features:

1. functions: 5771
2. assignOp_=: 1704
3. return: 1650
4. binaryOp_+: 833
5. if: 686
6. awaitExpressions: 346
7. asyncFunctions: 307

---

angular

• Features Total: 125
• Features Observed: 106
• Catalog Usage: 84.8%

Top 7 Features:

1. arrowFunctions: 35803
2. functions: 21490
3. assignOp_=: 19126
4. templateLiterals: 19035
5. return: 17747
6. importDecls: 17738
7. if: 16031

---

html5-boilerplate

• Features Total: 125
• Features Observed: 20
• Catalog Usage: 16.0%

Top 7 Features:

1. importDecls: 24
2. arrowFunctions: 19
3. templateLiterals: 16
4. interpolatedTemplates: 15
5. assignOp_=: 8
6. functions: 6
7. binaryOp_!==: 5

---

webpack

• Features Total: 125
• Features Observed: 101
• Catalog Usage: 80.8%

Top 7 Features:

1. assignOp_=: 12136
2. if: 6524
3. arrowFunctions: 5184
4. binaryOp_===: 4261
5. functions: 3979
6. return: 3739
7. importDecls: 2625

---

video.js

• Features Total: 125
• Features Observed: 78
• Catalog Usage: 62.4%

Top 7 Features:

1. assignOp_=: 4483
2. binaryOp_+: 3929
3. functions: 3695
4. if: 2305
5. return: 1791
6. arrowFunctions: 1035
7. binaryOp_===: 937

---

react-router

• Features Total: 125
• Features Observed: 88
• Catalog Usage: 70.4%

Top 7 Features:

1. awaitExpressions: 7113
2. arrowFunctions: 4413
3. templateLiterals: 2657
4. asyncFunctions: 2272
5. assignOp_=: 1371
6. importDecls: 1353
7. return: 1204

---

node-semver

• Features Total: 125
• Features Observed: 57
• Catalog Usage: 45.6%

Top 7 Features:

1. templateLiterals: 374
2. arrowFunctions: 357
3. assignOp_=: 320
4. interpolatedTemplates: 313
5. if: 228
6. return: 171
7. binaryOp_===: 138

---

sails

• Features Total: 125
• Features Observed: 45
• Catalog Usage: 36.0%

Top 7 Features:

1. functions: 2933
2. return: 1312
3. if: 758
4. assignOp_=: 751
5. binaryOp_+: 574
6. templateLiterals: 244
7. taggedTemplates: 157

---

tailwindcss

• Features Total: 125
• Features Observed: 98
• Catalog Usage: 78.4%

Top 7 Features:

1. templateLiterals: 4791
2. arrowFunctions: 3390
3. awaitExpressions: 2642
4. if: 2480
5. taggedTemplates: 2406
6. return: 2153
7. binaryOp_===: 1653

---

aws-sdk-js

• Features Total: 125
• Features Observed: 66
• Catalog Usage: 52.8%

Top 7 Features:

1. classMethods: 29787
2. assignOp_=: 7432
3. functions: 6672
4. return: 3902
5. importDecls: 2402
6. binaryOp_+: 1168
7. if: 1055

---

mocha

• Features Total: 125
• Features Observed: 62
• Catalog Usage: 49.6%

Top 7 Features:

1. functions: 4105
2. assignOp_=: 857
3. binaryOp_+: 506
4. return: 485
5. arrowFunctions: 467
6. if: 348
7. throw: 173

---

fastify

• Features Total: 125
• Features Observed: 70
• Catalog Usage: 56.0%

Top 7 Features:

1. arrowFunctions: 5789
2. awaitExpressions: 2116
3. functions: 2033
4. asyncFunctions: 1527
5. return: 745
6. assignOp_=: 597
7. binaryOp_+: 407

---

mithril

• Features Total: 125
• Features Observed: 63
• Catalog Usage: 50.4%

Top 7 Features:

1. functions: 3126
2. assignOp_=: 1549
3. return: 881
4. if: 790
5. binaryOp_+: 551
6. binaryOp_===: 437
7. logicalAND: 255

---

lodash

• Features Total: 125
• Features Observed: 54
• Catalog Usage: 43.2%

Top 7 Features:

1. functions: 4438
2. assignOp_=: 2158
3. return: 1757
4. binaryOp_+: 1618
5. if: 990
6. ternary: 972
7. arrayMethod_map: 762

---

alpine

• Features Total: 125
• Features Observed: 70
• Catalog Usage: 56.0%

Top 7 Features:

1. arrowFunctions: 1459
2. return: 824
3. functions: 823
4. if: 774
5. assignOp_=: 665
6. templateLiterals: 663
7. paramDestructuringObject: 564

---

tests

• Features Total: 125
• Features Observed: 27
• Catalog Usage: 21.6%

Top 7 Features:

1. classFields: 18
2. if: 16
3. importDecls: 14
4. functions: 13
5. classMethods: 12
6. return: 9
7. nullishCoalescing: 8

---

redux

• Features Total: 125
• Features Observed: 67
• Catalog Usage: 53.6%

Top 7 Features:

1. arrowFunctions: 888
2. importDecls: 520
3. return: 322
4. jsxElements: 311
5. exportDecls_named: 176
6. functions: 132
7. if: 129

---

next.js

• Features Total: 125
• Features Observed: 111
• Catalog Usage: 88.8%

Top 7 Features:

1. assignOp_=: 148096
2. if: 72707
3. return: 70726
4. functions: 60019
5. binaryOp_===: 56504
6. logicalAND: 49905
7. binaryOp_+: 42489

---

chart.js

• Features Total: 125
• Features Observed: 77
• Catalog Usage: 61.6%

Top 7 Features:

1. assignOp_=: 3186
2. functions: 2697
3. return: 1235
4. if: 1089
5. binaryOp_+: 888
6. binaryOp_-: 633
7. ternary: 624

---

moment

• Features Total: 125
• Features Observed: 47
• Catalog Usage: 37.6%

Top 7 Features:

1. binaryOp_+: 6542
2. functions: 6243
3. return: 5551
4. assignOp_=: 4798
5. if: 2969
6. binaryOp_===: 2446
7. ternary: 2389

---

mongoose

• Features Total: 125
• Features Observed: 76
• Catalog Usage: 60.8%

Top 7 Features:

1. functions: 7019
2. awaitExpressions: 6784
3. assignOp_=: 3143
4. asyncFunctions: 2680
5. arrowFunctions: 2330
6. return: 1263
7. arrayMethod_find: 590

---

debug

• Features Total: 125
• Features Observed: 35
• Catalog Usage: 28.0%

Top 7 Features:

1. assignOp_=: 96
2. arrowFunctions: 46
3. return: 37
4. if: 30
5. functions: 27
6. binaryOp_+: 25
7. logicalAND: 20

---

sveltekit

• Features Total: 125
• Features Observed: 93
• Catalog Usage: 74.4%

Top 7 Features:

1. awaitExpressions: 3274
2. arrowFunctions: 2666
3. if: 2124
4. return: 1802
5. importDecls: 1348
6. exportDecls_named: 1282
7. templateLiterals: 1259

---

dotenv

• Features Total: 125
• Features Observed: 19
• Catalog Usage: 15.2%

Top 7 Features:

1. arrowFunctions: 73
2. assignOp_=: 66
3. catch: 12
4. try: 12
5. if: 8
6. forOf: 6
7. templateLiterals: 5

---

hexo

• Features Total: 125
• Features Observed: 50
• Catalog Usage: 40.0%

Top 7 Features:

1. arrowFunctions: 1939
2. awaitExpressions: 1207
3. binaryOp_+: 1183
4. assignOp_=: 643
5. asyncFunctions: 552
6. importDecls: 450
7. return: 229

---

backbone

• Features Total: 125
• Features Observed: 45
• Catalog Usage: 36.0%

Top 7 Features:

1. functions: 1382
2. assignOp_=: 889
3. return: 481
4. if: 457
5. binaryOp_===: 148
6. logicalAND: 131
7. logicalOR: 130

---

zx

• Features Total: 125
• Features Observed: 79
• Catalog Usage: 63.2%

Top 7 Features:

1. arrowFunctions: 604
2. templateLiterals: 482
3. awaitExpressions: 410
4. taggedTemplates: 322
5. asyncFunctions: 262
6. importDecls: 206
7. return: 199

---

prettier

• Features Total: 125
• Features Observed: 0
• Catalog Usage: 0.0%

---

airbnb-style-guide

• Features Total: 125
• Features Observed: 19
• Catalog Usage: 15.2%

Top 7 Features:

1. arrowFunctions: 38
2. assignOp_=: 37
3. if: 23
4. binaryOp_===: 20
5. return: 19
6. destructuringObject: 14
7. arrayMethod_map: 12

---

nuxt

• Features Total: 125
• Features Observed: 82
• Catalog Usage: 65.6%

Top 7 Features:

1. arrowFunctions: 3454
2. awaitExpressions: 2091
3. importDecls: 2090
4. if: 2060
5. return: 1694
6. templateLiterals: 1222
7. binaryOp_===: 1046

---

zustand

• Features Total: 125
• Features Observed: 52
• Catalog Usage: 41.6%

Top 7 Features:

1. arrowFunctions: 157
2. return: 118
3. importDecls: 83
4. tsAsExpression: 75
5. if: 61
6. jsxElements: 51
7. assignOp_=: 43

---

htmx

• Features Total: 125
• Features Observed: 0
• Catalog Usage: 0.0%

---

koa

• Features Total: 125
• Features Observed: 35
• Catalog Usage: 28.0%

Top 7 Features:

1. arrowFunctions: 862
2. assignOp_=: 431
3. asyncFunctions: 81
4. awaitExpressions: 78
5. destructuringObject: 78
6. return: 65
7. binaryOp_===: 20

---

node

• Features Total: 125
• Features Observed: 111
• Catalog Usage: 88.8%

Top 7 Features:

1. assignOp_=: 105208
2. functions: 71864
3. binaryOp_+: 69000
4. arrowFunctions: 49788
5. return: 40225
6. if: 37517

7. **binaryOp_

   **: 32378

---

jquery

• Features Total: 125
• Features Observed: 63
• Catalog Usage: 50.4%

Top 7 Features:

1. functions: 3821
2. assignOp_=: 3549
3. binaryOp_+: 2281
4. if: 1845
5. return: 1639
6. binaryOp_===: 916
7. logicalOR: 860

---

commander.js

• Features Total: 125
• Features Observed: 38
• Catalog Usage: 30.4%

Top 7 Features:

1. arrowFunctions: 1862
2. assignOp_=: 256
3. destructuringObject: 141
4. return: 118
5. templateLiterals: 102
6. functions: 100
7. interpolatedTemplates: 90

---

uni-app

• Features Total: 125
• Features Observed: 92
• Catalog Usage: 73.6%

Top 7 Features:

1. if: 16741
2. assignOp_=: 13884
3. return: 12781
4. functions: 11068
5. arrowFunctions: 9029
6. templateLiterals: 7124
7. importDecls: 5941

---

ghost

• Features Total: 125
• Features Observed: 96
• Catalog Usage: 76.8%

Top 7 Features:

1. functions: 21571
2. assignOp_=: 17201
3. awaitExpressions: 15699
4. return: 13149
5. if: 9893
6. templateLiterals: 9520
7. arrowFunctions: 8691

---

typescript

• Features Total: 125
• Features Observed: 113
• Catalog Usage: 90.4%

Top 7 Features:

1. binaryOp_/: 1283404
2. labels: 772378
3. binaryOp_*: 192611
4. assignOp_=: 153243
5. functions: 125341
6. binaryOp_-: 76529
7. return: 71104

---

parcel

• Features Total: 125
• Features Observed: 104
• Catalog Usage: 83.2%

Top 7 Features:

1. assignOp_=: 6864
2. awaitExpressions: 6703
3. functions: 6203

4. **binaryOp_

   **: 4422

5. importDecls: 3730
6. binaryOp_<: 3536
7. if: 3428

---

axios

• Features Total: 125
• Features Observed: 76
• Catalog Usage: 60.8%

Top 7 Features:

1. functions: 1356
2. assignOp_=: 511
3. arrowFunctions: 433
4. awaitExpressions: 267
5. return: 254
6. importDecls: 215
7. asyncFunctions: 185

---

File Presence

Summary:

• Repositories analyzed: 56
• Features with data: 113
• Total occurrences: 638817

Top 7 Features

Rank	Feature	Count	%	Cumulative %
1	functions	56315	8.82%	8.82%
2	assignOp_=	44895	7.03%	15.84%
3	return	42313	6.62%	22.47%
4	importDecls	29896	4.68%	27.15%
5	arrowFunctions	29673	4.64%	31.79%
6	if	24073	3.77%	35.56%
7	exportDecls_named	23446	3.67%	39.23%

Pareto Analysis

80% of usage comes from 33 features (26.4% of catalog): functions, assignOp_=, return, importDecls, arrowFunctions, if, exportDecls_named, classDecls, templateLiterals, binaryOp_===, binaryOp_+, binaryOp_<, ternary, logicalOR, exportDecls_default, destructuringObject, logicalAND, asyncFunctions, interpolatedTemplates, binaryOp_>, forClassic, awaitExpressions, classMethods, classFields, binaryOp_!==, updateOp_++, spreadElement, throw, binaryOp_-, paramDestructuringObject, try, classExtends, jsxElements

90% of usage comes from 49 features (39.2% of catalog): functions, assignOp_=, return, importDecls, arrowFunctions, if, exportDecls_named, classDecls, templateLiterals, binaryOp_===, binaryOp_+, binaryOp_<, ternary, logicalOR, exportDecls_default, destructuringObject, logicalAND, asyncFunctions, interpolatedTemplates, binaryOp_>, forClassic, awaitExpressions, classMethods, classFields, binaryOp_!==, updateOp_++, spreadElement, throw, binaryOp_-, paramDestructuringObject, try, classExtends, jsxElements, labels, catch, binaryOp_*, forOf, binaryOp_/, binaryOp_%, updateOp_–, assignOp_+=, arrayMethod_map, tsAsExpression, binaryOp_in, paramDefault, binaryOp_instanceof, binaryOp_==, destructuringArray, forIn

95% of usage comes from 63 features (50.4% of catalog): functions, assignOp_=, return, importDecls, arrowFunctions, if, exportDecls_named, classDecls, templateLiterals, binaryOp_===, binaryOp_+, binaryOp_<, ternary, logicalOR, exportDecls_default, destructuringObject, logicalAND, asyncFunctions, interpolatedTemplates, binaryOp_>, forClassic, awaitExpressions, classMethods, classFields, binaryOp_!==, updateOp_++, spreadElement, throw, binaryOp_-, paramDestructuringObject, try, classExtends, jsxElements, labels, catch, binaryOp_*, forOf, binaryOp_/, binaryOp_%, updateOp_–, assignOp_+=, arrayMethod_map, tsAsExpression, binaryOp_in, paramDefault, binaryOp_instanceof, binaryOp_==, destructuringArray, forIn, optionalChaining, binaryOp_|, break, switch, switchCases, while, importTypeOnly, binaryOp_>=, binaryOp_!=, arrayMethod_filter, dynamicImports, restElement, newPromise, continue

Catalog Usage Summary

Total features in JavaScript catalog: 125

Usage Threshold	Features Required	Catalog Percentage
80%	33	26.4%
90%	49	39.2%
95%	63	50.4%

Repository Breakdown

core-js

• Features Total: 125
• Features Observed: 87
• Catalog Usage: 69.6%

Top 7 Features:

1. assignOp_=: 2757
2. functions: 1163
3. return: 1018
4. if: 830
5. arrowFunctions: 827
6. importDecls: 692
7. destructuringObject: 497

---

underscore

• Features Total: 125
• Features Observed: 54
• Catalog Usage: 43.2%

Top 7 Features:

1. exportDecls_default: 160
2. functions: 144
3. importDecls: 138
4. return: 136
5. assignOp_=: 84
6. if: 79
7. ternary: 54

---

three.js

• Features Total: 125
• Features Observed: 100
• Catalog Usage: 80.0%

Top 7 Features:

1. importDecls: 1182
2. functions: 1100
3. assignOp_=: 1071
4. return: 955
5. exportDecls_named: 930
6. classDecls: 815
7. if: 790

---

js-yaml

• Features Total: 125
• Features Observed: 46
• Catalog Usage: 36.8%

Top 7 Features:

1. functions: 97
2. assignOp_=: 56
3. return: 27
4. templateLiterals: 27
5. binaryOp_===: 22
6. binaryOp_+: 21
7. if: 17

---

chalk

• Features Total: 125
• Features Observed: 45
• Catalog Usage: 36.0%

Top 7 Features:

1. importDecls: 11
2. assignOp_=: 9
3. arrowFunctions: 7
4. binaryOp_+: 6
5. if: 5
6. binaryOp_===: 4
7. logicalOR: 4

---

css-loader

• Features Total: 125
• Features Observed: 56
• Catalog Usage: 44.8%

Top 7 Features:

1. assignOp_=: 196
2. importDecls: 189
3. exportDecls_default: 168
4. arrowFunctions: 35
5. templateLiterals: 34
6. return: 29
7. interpolatedTemplates: 24

---

eslint

• Features Total: 125
• Features Observed: 95
• Catalog Usage: 76.0%

Top 7 Features:

1. assignOp_=: 300
2. if: 150
3. functions: 138
4. arrowFunctions: 133
5. return: 130
6. logicalOR: 67
7. logicalAND: 65

---

shelljs

• Features Total: 125
• Features Observed: 54
• Catalog Usage: 43.2%

Top 7 Features:

1. assignOp_=: 74
2. functions: 49
3. return: 42
4. binaryOp_+: 41
5. if: 39
6. arrowFunctions: 38
7. binaryOp_===: 29

---

react

• Features Total: 125
• Features Observed: 109
• Catalog Usage: 87.2%

Top 7 Features:

1. functions: 3323
2. return: 3097
3. assignOp_=: 2332
4. exportDecls_named: 1989
5. importDecls: 1820
6. arrowFunctions: 1807
7. if: 1718

---

preact

• Features Total: 125
• Features Observed: 85
• Catalog Usage: 68.0%

Top 7 Features:

1. importDecls: 186
2. functions: 163
3. return: 160
4. arrowFunctions: 156
5. assignOp_=: 149
6. jsxElements: 119
7. if: 94

---

meteor

• Features Total: 125
• Features Observed: 105
• Catalog Usage: 84.0%

Top 7 Features:

1. functions: 1030
2. assignOp_=: 789
3. return: 683
4. if: 679
5. arrowFunctions: 535
6. importDecls: 491
7. binaryOp_+: 481

---

vue

• Features Total: 125
• Features Observed: 92
• Catalog Usage: 73.6%

Top 7 Features:

1. importDecls: 464
2. arrowFunctions: 384
3. functions: 350
4. templateLiterals: 347
5. return: 337
6. assignOp_=: 321
7. if: 278

---

karma

• Features Total: 125
• Features Observed: 63
• Catalog Usage: 50.4%

Top 7 Features:

1. functions: 71
2. assignOp_=: 64
3. return: 51
4. arrowFunctions: 49
5. if: 29
6. binaryOp_+: 27
7. logicalOR: 19

---

winston

• Features Total: 125
• Features Observed: 42
• Catalog Usage: 33.6%

Top 7 Features:

1. functions: 39
2. assignOp_=: 28
3. destructuringObject: 23
4. arrowFunctions: 22
5. return: 22
6. if: 14
7. templateLiterals: 13

---

express

• Features Total: 125
• Features Observed: 33
• Catalog Usage: 26.4%

Top 7 Features:

1. functions: 127
2. assignOp_=: 67
3. if: 56
4. return: 52
5. binaryOp_+: 41
6. binaryOp_===: 24
7. logicalOR: 22

---

jasmine

• Features Total: 125
• Features Observed: 74
• Catalog Usage: 59.2%

Top 7 Features:

1. functions: 245
2. assignOp_=: 194
3. return: 185
4. if: 114
5. binaryOp_+: 104
6. binaryOp_===: 80
7. throw: 64

---

angular

• Features Total: 125
• Features Observed: 106
• Catalog Usage: 84.8%

Top 7 Features:

1. importDecls: 4266
2. exportDecls_named: 3444
3. functions: 3235
4. return: 2430
5. arrowFunctions: 2426
6. classDecls: 2404
7. assignOp_=: 2278

---

html5-boilerplate

• Features Total: 125
• Features Observed: 20
• Catalog Usage: 16.0%

Top 7 Features:

1. assignOp_=: 5
2. importDecls: 4
3. arrowFunctions: 3
4. importMeta: 3
5. interpolatedTemplates: 3
6. templateLiterals: 3
7. binaryOp_!==: 2

---

webpack

• Features Total: 125
• Features Observed: 101
• Catalog Usage: 80.8%

Top 7 Features:

1. assignOp_=: 3160
2. functions: 1840
3. arrowFunctions: 1648
4. importDecls: 1348
5. return: 1147
6. exportDecls_default: 957
7. exportDecls_named: 940

---

video.js

• Features Total: 125
• Features Observed: 78
• Catalog Usage: 62.4%

Top 7 Features:

1. functions: 210
2. importDecls: 191
3. assignOp_=: 188
4. return: 153
5. if: 138
6. arrowFunctions: 123
7. binaryOp_===: 108

---

react-router

• Features Total: 125
• Features Observed: 88
• Catalog Usage: 70.4%

Top 7 Features:

1. importDecls: 366
2. arrowFunctions: 245
3. asyncFunctions: 192
4. functions: 192
5. awaitExpressions: 187
6. assignOp_=: 182
7. templateLiterals: 172

---

node-semver

• Features Total: 125
• Features Observed: 57
• Catalog Usage: 45.6%

Top 7 Features:

1. arrowFunctions: 90
2. assignOp_=: 71
3. destructuringObject: 53
4. templateLiterals: 48
5. interpolatedTemplates: 47
6. return: 28
7. logicalOR: 24

---

sails

• Features Total: 125
• Features Observed: 45
• Catalog Usage: 36.0%

Top 7 Features:

1. assignOp_=: 160
2. functions: 108
3. return: 91
4. if: 90
5. binaryOp_+: 59
6. binaryOp_>: 57
7. binaryOp_<: 56

---

tailwindcss

• Features Total: 125
• Features Observed: 98
• Catalog Usage: 78.4%

Top 7 Features:

1. importDecls: 266
2. arrowFunctions: 223
3. return: 188
4. templateLiterals: 187
5. functions: 176
6. if: 171
7. binaryOp_===: 146

---

aws-sdk-js

• Features Total: 125
• Features Observed: 66
• Catalog Usage: 52.8%

Top 7 Features:

1. functions: 584
2. assignOp_=: 574
3. return: 500
4. importDecls: 397
5. classDecls: 383
6. classExtends: 383
7. classFields: 383

---

mocha

• Features Total: 125
• Features Observed: 62
• Catalog Usage: 49.6%

Top 7 Features:

1. functions: 307
2. assignOp_=: 123
3. return: 117
4. if: 94
5. throw: 94
6. arrowFunctions: 92
7. binaryOp_+: 54

---

fastify

• Features Total: 125
• Features Observed: 70
• Catalog Usage: 56.0%

Top 7 Features:

1. arrowFunctions: 215
2. functions: 184
3. destructuringObject: 180
4. asyncFunctions: 173
5. awaitExpressions: 146
6. assignOp_=: 110
7. return: 106

---

mithril

• Features Total: 125
• Features Observed: 63
• Catalog Usage: 50.4%

Top 7 Features:

1. assignOp_=: 87
2. functions: 84
3. return: 54
4. if: 40
5. ternary: 33
6. binaryOp_+: 31
7. binaryOp_===: 30

---

lodash

• Features Total: 125
• Features Observed: 54
• Catalog Usage: 43.2%

Top 7 Features:

1. assignOp_=: 14
2. functions: 12
3. if: 11
4. return: 11
5. binaryOp_+: 10
6. ternary: 10
7. binaryOp_==: 9

---

alpine

• Features Total: 125
• Features Observed: 70
• Catalog Usage: 56.0%

Top 7 Features:

1. arrowFunctions: 153
2. importDecls: 143
3. templateLiterals: 91
4. paramDestructuringObject: 90
5. assignOp_=: 76
6. functions: 76
7. return: 68

---

tests

• Features Total: 125
• Features Observed: 27
• Catalog Usage: 21.6%

Top 7 Features:

1. arrayMethod_map: 1
2. arrowFunctions: 1
3. assignOp_=: 1
4. asyncFunctions: 1
5. awaitExpressions: 1
6. binaryOp_!==: 1
7. binaryOp_+: 1

---

redux

• Features Total: 125
• Features Observed: 67
• Catalog Usage: 53.6%

Top 7 Features:

1. importDecls: 158
2. arrowFunctions: 143
3. exportDecls_default: 94
4. return: 85
5. jsxElements: 72
6. assignOp_=: 55
7. if: 51

---

next.js

• Features Total: 125
• Features Observed: 111
• Catalog Usage: 88.8%

Top 7 Features:

1. return: 6972
2. functions: 6792
3. importDecls: 6710
4. exportDecls_default: 5473
5. arrowFunctions: 4783
6. jsxElements: 3982
7. assignOp_=: 3545

---

chart.js

• Features Total: 125
• Features Observed: 77
• Catalog Usage: 61.6%

Top 7 Features:

1. assignOp_=: 636
2. functions: 245
3. return: 187
4. ternary: 142
5. arrowFunctions: 140
6. importDecls: 131
7. binaryOp_+: 112

---

moment

• Features Total: 125
• Features Observed: 47
• Catalog Usage: 37.6%

Top 7 Features:

1. functions: 491
2. binaryOp_+: 377
3. importDecls: 335
4. return: 313
5. binaryOp_<: 299
6. assignOp_=: 283
7. ternary: 265

---

mongoose

• Features Total: 125
• Features Observed: 76
• Catalog Usage: 60.8%

Top 7 Features:

1. functions: 229
2. assignOp_=: 172
3. arrowFunctions: 140
4. asyncFunctions: 129
5. awaitExpressions: 121
6. return: 119
7. if: 98

---

debug

• Features Total: 125
• Features Observed: 35
• Catalog Usage: 28.0%

Top 7 Features:

1. assignOp_=: 6
2. arrowFunctions: 5
3. binaryOp_===: 5
4. functions: 4
5. if: 4
6. logicalOR: 4
7. arrayMethod_map: 3

---

sveltekit

• Features Total: 125
• Features Observed: 93
• Catalog Usage: 74.4%

Top 7 Features:

1. exportDecls_named: 755
2. functions: 583
3. return: 543
4. importDecls: 510
5. arrowFunctions: 308
6. paramDestructuringObject: 275
7. asyncFunctions: 267

---

dotenv

• Features Total: 125
• Features Observed: 19
• Catalog Usage: 15.2%

Top 7 Features:

1. arrowFunctions: 4
2. assignOp_=: 4
3. functions: 3
4. templateLiterals: 3
5. catch: 2
6. if: 2
7. interpolatedTemplates: 2

---

hexo

• Features Total: 125
• Features Observed: 50
• Catalog Usage: 40.0%

Top 7 Features:

1. arrowFunctions: 121
2. importDecls: 121
3. assignOp_=: 83
4. asyncFunctions: 63
5. awaitExpressions: 62
6. return: 51
7. binaryOp_+: 47

---

backbone

• Features Total: 125
• Features Observed: 45
• Catalog Usage: 36.0%

Top 7 Features:

1. assignOp_=: 19
2. functions: 19
3. return: 15
4. if: 14
5. binaryOp_===: 13
6. binaryOp_+: 12
7. binaryOp_!==: 9

---

zx

• Features Total: 125
• Features Observed: 79
• Catalog Usage: 63.2%

Top 7 Features:

1. importDecls: 54
2. templateLiterals: 44
3. arrowFunctions: 43
4. awaitExpressions: 34
5. interpolatedTemplates: 28
6. assignOp_=: 26
7. taggedTemplates: 25

---

prettier

• Features Total: 125
• Features Observed: 0
• Catalog Usage: 0.0%

---

airbnb-style-guide

• Features Total: 125
• Features Observed: 19
• Catalog Usage: 15.2%

Top 7 Features:

1. assignOp_=: 25
2. arrowFunctions: 10
3. arrayMethod_map: 8
4. spreadElement: 7
5. binaryOp_===: 6
6. logicalAND: 6
7. return: 6

---

nuxt

• Features Total: 125
• Features Observed: 82
• Catalog Usage: 65.6%

Top 7 Features:

1. importDecls: 382
2. arrowFunctions: 370
3. functions: 300
4. return: 284
5. if: 244
6. exportDecls_named: 242
7. importTypeOnly: 215

---

zustand

• Features Total: 125
• Features Observed: 52
• Catalog Usage: 41.6%

Top 7 Features:

1. importDecls: 23
2. return: 22
3. arrowFunctions: 21
4. exportDecls_named: 16
5. exportDecls_default: 14
6. functions: 14
7. assignOp_=: 12

---

htmx

• Features Total: 125
• Features Observed: 0
• Catalog Usage: 0.0%

---

koa

• Features Total: 125
• Features Observed: 35
• Catalog Usage: 28.0%

Top 7 Features:

1. arrowFunctions: 73
2. destructuringObject: 73
3. assignOp_=: 62
4. asyncFunctions: 15
5. awaitExpressions: 15
6. return: 14
7. try: 7

---

node

• Features Total: 125
• Features Observed: 111
• Catalog Usage: 88.8%

Top 7 Features:

1. functions: 11446
2. assignOp_=: 7564
3. return: 6859
4. arrowFunctions: 6560
5. if: 5269
6. binaryOp_%: 4082
7. updateOp_++: 3861

---

jquery

• Features Total: 125
• Features Observed: 63
• Catalog Usage: 50.4%

Top 7 Features:

1. functions: 125
2. importDecls: 117
3. return: 110
4. assignOp_=: 109
5. exportDecls_named: 108
6. if: 97
7. binaryOp_===: 84

---

commander.js

• Features Total: 125
• Features Observed: 38
• Catalog Usage: 30.4%

Top 7 Features:

1. arrowFunctions: 133
2. destructuringObject: 52
3. assignOp_=: 49
4. functions: 38
5. return: 38
6. templateLiterals: 38
7. interpolatedTemplates: 34

---

uni-app

• Features Total: 125
• Features Observed: 92
• Catalog Usage: 73.6%

Top 7 Features:

1. importDecls: 1527
2. exportDecls_named: 1505
3. functions: 1284
4. return: 1175
5. arrowFunctions: 1109
6. if: 1083
7. assignOp_=: 970

---

ghost

• Features Total: 125
• Features Observed: 96
• Catalog Usage: 76.8%

Top 7 Features:

1. functions: 2536
2. assignOp_=: 2433
3. return: 2043
4. if: 1481
5. arrowFunctions: 1376
6. importDecls: 1240
7. asyncFunctions: 1200

---

typescript

• Features Total: 125
• Features Observed: 113
• Catalog Usage: 90.4%

Top 7 Features:

1. functions: 15993
2. assignOp_=: 11405
3. return: 10615
4. classDecls: 9289
5. exportDecls_named: 7340
6. binaryOp_<: 5733
7. binaryOp_>: 5414

---

parcel

• Features Total: 125
• Features Observed: 104
• Catalog Usage: 83.2%

Top 7 Features:

1. assignOp_=: 1371
2. importDecls: 1226
3. functions: 937
4. return: 803
5. exportDecls_named: 773
6. exportDecls_default: 645
7. arrowFunctions: 598

---

axios

• Features Total: 125
• Features Observed: 76
• Catalog Usage: 60.8%

Top 7 Features:

1. functions: 81
2. importDecls: 79
3. assignOp_=: 50
4. return: 43
5. arrowFunctions: 42
6. destructuringObject: 31
7. binaryOp_+: 30

---

Per 1000 Lines of Code

Summary:

• Repositories analyzed: 56
• Features with data: 113
• Total occurrences: 16682.352120738833

Top 7 Features

Rank	Feature	Count	%	Cumulative %
1	assignOp_=	2068.2843743474914	12.40%	12.40%
2	functions	1973.963582259294	11.83%	24.23%
3	arrowFunctions	1392.5648945954963	8.35%	32.58%
4	return	1134.9550910964742	6.80%	39.38%
5	if	1046.7898473403557	6.27%	45.66%
6	binaryOp_+	822.9402622543561	4.93%	50.59%
7	templateLiterals	574.4184824686808	3.44%	54.03%

Pareto Analysis

80% of usage comes from 21 features (16.8% of catalog): assignOp_=, functions, arrowFunctions, return, if, binaryOp_+, templateLiterals, awaitExpressions, binaryOp_===, importDecls, binaryOp_/, logicalAND, binaryOp_|, ternary, asyncFunctions, logicalOR, interpolatedTemplates, labels, exportDecls_named, binaryOp_», binaryOp_!==

90% of usage comes from 35 features (28.0% of catalog): assignOp_=, functions, arrowFunctions, return, if, binaryOp_+, templateLiterals, awaitExpressions, binaryOp_===, importDecls, binaryOp_/, logicalAND, binaryOp_|, ternary, asyncFunctions, logicalOR, interpolatedTemplates, labels, exportDecls_named, binaryOp_», binaryOp_!==, binaryOp_<, jsxElements, updateOp_++, classMethods, destructuringObject, binaryOp_*, binaryOp_-, taggedTemplates, binaryOp_>, switchCases, spreadElement, tsAsExpression, throw, break

95% of usage comes from 48 features (38.4% of catalog): assignOp_=, functions, arrowFunctions, return, if, binaryOp_+, templateLiterals, awaitExpressions, binaryOp_===, importDecls, binaryOp_/, logicalAND, binaryOp_|, ternary, asyncFunctions, logicalOR, interpolatedTemplates, labels, exportDecls_named, binaryOp_», binaryOp_!==, binaryOp_<, jsxElements, updateOp_++, classMethods, destructuringObject, binaryOp_*, binaryOp_-, taggedTemplates, binaryOp_>, switchCases, spreadElement, tsAsExpression, throw, break, forClassic, binaryOp_==, arrayMethod_map, classFields, paramDestructuringObject, try, assignOp_+=, catch, forOf, optionalChaining, binaryOp_»>, binaryOp_!=, classDecls

Catalog Usage Summary

Total features in JavaScript catalog: 125

Usage Threshold	Features Required	Catalog Percentage
80%	21	16.8%
90%	35	28.0%
95%	48	38.4%

Repository Breakdown

core-js

• Features Total: 125
• Features Observed: 87
• Catalog Usage: 69.6%

Top 7 Features:

1. assignOp_=: 49.88275421018973
2. arrowFunctions: 38.95402543878349
3. functions: 33.375968165991615
4. return: 29.155119732821717
5. if: 24.216584949904075
6. binaryOp_===: 13.387337454700491
7. logicalAND: 10.410004974063812

---

underscore

• Features Total: 125
• Features Observed: 54
• Catalog Usage: 43.2%

Top 7 Features:

1. functions: 55.058636453985294
2. return: 52.19070335349405
3. assignOp_=: 49.01042110344436
4. if: 25.24349035976943
5. logicalAND: 16.611295681063122
6. ternary: 13.913734843967402
7. logicalOR: 13.572990317176364

---

three.js

• Features Total: 125
• Features Observed: 100
• Catalog Usage: 80.0%

Top 7 Features:

1. assignOp_=: 392.71406904283026

2. **binaryOp_

   **: 225.59060635035775

3. binaryOp_+: 177.05826107026277
4. binaryOp_»: 160.87943882093046
5. if: 103.42205479903723
6. functions: 49.02486069438491
7. return: 46.04091793333114

---

js-yaml

• Features Total: 125
• Features Observed: 46
• Catalog Usage: 36.8%

Top 7 Features:

1. functions: 76.05693647758658
2. assignOp_=: 41.852560016995966
3. binaryOp_+: 38.665816868493735
4. return: 22.094752496282133
5. binaryOp_===: 13.809220310176334
6. if: 13.596770766942852
7. templateLiterals: 9.34777990227321

---

chalk

• Features Total: 125
• Features Observed: 45
• Catalog Usage: 36.0%

Top 7 Features:

1. arrowFunctions: 44.354838709677416
2. templateLiterals: 39.516129032258064
3. taggedTemplates: 38.70967741935484
4. assignOp_=: 32.25806451612903
5. importDecls: 21.774193548387096
6. binaryOp_+: 20.967741935483872
7. return: 20.161290322580644

---

css-loader

• Features Total: 125
• Features Observed: 56
• Catalog Usage: 44.8%

Top 7 Features:

1. templateLiterals: 53.694429152624295
2. assignOp_=: 30.6403319145508
3. arrowFunctions: 5.1425272231695685
4. importDecls: 3.4775836835533114
5. if: 3.4641567195241483
6. awaitExpressions: 3.4507297554949847
7. asyncFunctions: 3.423875827436658

---

eslint

• Features Total: 125
• Features Observed: 95
• Catalog Usage: 76.0%

Top 7 Features:

1. assignOp_=: 24.727112532428333
2. if: 22.761017474587607
3. return: 15.32085692375467
4. functions: 15.288224640636981
5. binaryOp_===: 10.311801465189511
6. logicalAND: 8.680187309305095
7. logicalOR: 5.3761686436391525

---

shelljs

• Features Total: 125
• Features Observed: 54
• Catalog Usage: 43.2%

Top 7 Features:

1. arrowFunctions: 40.770101925254814
2. templateLiterals: 33.59758399395999
3. interpolatedTemplates: 33.112225637706956
4. assignOp_=: 25.346491937658417
5. if: 20.061478725125387
6. binaryOp_+: 19.41433425012134
7. functions: 10.516097718815725

---

react

• Features Total: 125
• Features Observed: 109
• Catalog Usage: 87.2%

Top 7 Features:

1. assignOp_=: 43.591014941670664
2. arrowFunctions: 36.2803485275602
3. jsxElements: 34.554702559359995
4. return: 32.06581688932467
5. functions: 31.756621243690738
6. if: 30.02261863641935
7. binaryOp_<: 20.00718670960122

---

preact

• Features Total: 125
• Features Observed: 85
• Catalog Usage: 68.0%

Top 7 Features:

1. jsxElements: 70.2978020465287
2. arrowFunctions: 52.47862463482158
3. assignOp_=: 28.403615839948607
4. functions: 26.46109607060371
5. return: 24.426803713730706
6. if: 11.762186634852169
7. classMethods: 11.716300341088116

---

meteor

• Features Total: 125
• Features Observed: 105
• Catalog Usage: 84.0%

Top 7 Features:

1. assignOp_=: 52.042846599184486
2. functions: 39.018805021033224
3. if: 38.143239200653305
4. return: 30.720573832368434
5. awaitExpressions: 22.913445267314174
6. binaryOp_+: 17.662856645741016
7. arrowFunctions: 12.016579624573092

---

vue

• Features Total: 125
• Features Observed: 92
• Catalog Usage: 73.6%

Top 7 Features:

1. arrowFunctions: 55.101693182979595
2. templateLiterals: 49.160222123803365
3. assignOp_=: 30.456852791878177
4. if: 27.28852246789085
5. return: 24.54263618710183
6. functions: 21.08813409191565
7. awaitExpressions: 17.708581746329166

---

karma

• Features Total: 125
• Features Observed: 63
• Catalog Usage: 50.4%

Top 7 Features:

1. arrowFunctions: 37.30846102598268
2. assignOp_=: 35.09781357882624
3. functions: 17.35206831809097
4. return: 13.596995942099207
5. if: 9.932772091333051
6. binaryOp_+: 7.237599176306705
7. binaryOp_===: 3.664223850766156

---

winston

• Features Total: 125
• Features Observed: 42
• Catalog Usage: 33.6%

Top 7 Features:

1. functions: 28.584392014519057
2. arrowFunctions: 10.43557168784029
3. assignOp_=: 8.24258923169994
4. awaitExpressions: 5.5202661826981245
5. templateLiterals: 3.856624319419238
6. return: 3.176043557168784
7. interpolatedTemplates: 2.64670296430732

---

express

• Features Total: 125
• Features Observed: 33
• Catalog Usage: 26.4%

Top 7 Features:

1. functions: 158.73186458893068
2. assignOp_=: 16.657710908113916
3. binaryOp_+: 15.368081676518
4. return: 10.854379365932294
5. if: 10.317033852767329
6. binaryOp_===: 2.9016657710908116
7. updateOp_++: 2.632993014508329

---

jasmine

• Features Total: 125
• Features Observed: 74
• Catalog Usage: 59.2%

Top 7 Features:

1. functions: 124.3267697875824
2. assignOp_=: 36.70989702270671
3. return: 35.5465552156491
4. binaryOp_+: 17.945624542203454
5. if: 14.77874962299108
6. awaitExpressions: 7.45400491188763
7. asyncFunctions: 6.613813606790469

---

angular

• Features Total: 125
• Features Observed: 106
• Catalog Usage: 84.8%

Top 7 Features:

1. arrowFunctions: 34.92839303832046
2. functions: 20.965035510809336
3. assignOp_=: 18.658784047451807
4. templateLiterals: 18.570007024116133
5. return: 17.313470693826584
6. importDecls: 17.304690548661515
7. if: 15.63938968235386

---

html5-boilerplate

• Features Total: 125
• Features Observed: 20
• Catalog Usage: 16.0%

Top 7 Features:

1. importDecls: 4.6801872074882995
2. arrowFunctions: 3.705148205928237
3. templateLiterals: 3.1201248049921997
4. interpolatedTemplates: 2.925117004680187
5. assignOp_=: 1.5600624024960998
6. functions: 1.1700468018720749
7. binaryOp_!==: 0.9750390015600624

---

webpack

• Features Total: 125
• Features Observed: 101
• Catalog Usage: 80.8%

Top 7 Features:

1. assignOp_=: 51.91272024193997
2. if: 27.906936952737013
3. arrowFunctions: 22.174978719035664
4. binaryOp_===: 18.226771667016003
5. functions: 17.02049388947587
6. return: 15.993874504335329
7. importDecls: 11.228649524974657

---

video.js

• Features Total: 125
• Features Observed: 78
• Catalog Usage: 62.4%

Top 7 Features:

1. assignOp_=: 37.929488209961676
2. binaryOp_+: 33.24223938811943
3. functions: 31.262426708857546
4. if: 19.502000964524125
5. return: 15.15318166050443
6. arrowFunctions: 8.756863773658338
7. binaryOp_===: 7.927711454993105

---

react-router

• Features Total: 125
• Features Observed: 88
• Catalog Usage: 70.4%

Top 7 Features:

1. awaitExpressions: 50.814765071903636
2. arrowFunctions: 31.526157495052825
3. templateLiterals: 18.981418641367632
4. asyncFunctions: 16.23100607948335
5. assignOp_=: 9.794326291800912
6. importDecls: 9.665735574621907
7. return: 8.601290193529028

---

node-semver

• Features Total: 125
• Features Observed: 57
• Catalog Usage: 45.6%

Top 7 Features:

1. templateLiterals: 54.84675172312656
2. arrowFunctions: 52.35371755389353
3. assignOp_=: 46.92770200909224
4. interpolatedTemplates: 45.90115852764335
5. if: 33.435987681478224
6. return: 25.076990761108668
7. binaryOp_===: 20.23757149142103

---

sails

• Features Total: 125
• Features Observed: 45
• Catalog Usage: 36.0%

Top 7 Features:

1. functions: 125.71257125712572
2. return: 56.234194848056234
3. if: 32.48896318203249
4. assignOp_=: 32.18893317903219
5. binaryOp_+: 24.602460246024602
6. templateLiterals: 10.458188676010458
7. taggedTemplates: 6.729244353006729

---

tailwindcss

• Features Total: 125
• Features Observed: 98
• Catalog Usage: 78.4%

Top 7 Features:

1. templateLiterals: 42.24681451435122
2. arrowFunctions: 29.892861866760725
3. awaitExpressions: 23.297032758696705
4. if: 21.86852431550637
5. taggedTemplates: 21.215995767382392
6. return: 18.98505356906662
7. binaryOp_===: 14.576076892553239

---

aws-sdk-js

• Features Total: 125
• Features Observed: 66
• Catalog Usage: 52.8%

Top 7 Features:

1. classMethods: 8.659343905056822
2. assignOp_=: 2.160548021028714
3. functions: 1.9396093105898249
4. return: 1.1343458528059798
5. importDecls: 0.6982826085186989
6. binaryOp_+: 0.33954791288502933
7. if: 0.30669781514872085

---

mocha

• Features Total: 125
• Features Observed: 62
• Catalog Usage: 49.6%

Top 7 Features:

1. functions: 107.85318304826463
2. assignOp_=: 22.51648669241481
3. binaryOp_+: 13.294448385486456
4. return: 12.742702503875359
5. arrowFunctions: 12.269777462494417
6. if: 9.143217466698195
7. throw: 4.545335119939045

---

fastify

• Features Total: 125
• Features Observed: 70
• Catalog Usage: 56.0%

Top 7 Features:

1. arrowFunctions: 89.10540573820957
2. awaitExpressions: 32.5698805565817
3. functions: 31.29232853096909
4. asyncFunctions: 23.503878832656074
5. return: 11.467183844354143
6. assignOp_=: 9.189139268562984
7. binaryOp_+: 6.264622583425687

---

mithril

• Features Total: 125
• Features Observed: 63
• Catalog Usage: 50.4%

Top 7 Features:

1. functions: 102.80527510112803
2. assignOp_=: 50.942217252606305
3. return: 28.97359160719571
4. if: 25.980859670470615
5. binaryOp_+: 18.12082744104976
6. binaryOp_===: 14.37169072910843
7. logicalAND: 8.386226855658236

---

lodash

• Features Total: 125
• Features Observed: 54
• Catalog Usage: 43.2%

Top 7 Features:

1. functions: 78.1448091280462
2. assignOp_=: 37.99830962107339
3. return: 30.937455979715452
4. binaryOp_+: 28.48992815889562
5. if: 17.432032680659248
6. ternary: 17.11508663191999
7. arrayMethod_map: 13.417382729961966

---

alpine

• Features Total: 125
• Features Observed: 70
• Catalog Usage: 56.0%

Top 7 Features:

1. arrowFunctions: 41.9590475094904
2. return: 23.697227654434602
3. functions: 23.668468883009318
4. if: 22.25928908317037
5. assignOp_=: 19.124582997814333
6. templateLiterals: 19.067065454963764
7. paramDestructuringObject: 16.21994708386058

---

tests

• Features Total: 125
• Features Observed: 27
• Catalog Usage: 21.6%

Top 7 Features:

1. classFields: 18
2. if: 16
3. importDecls: 14
4. functions: 13
5. classMethods: 12
6. return: 9
7. nullishCoalescing: 8

---

redux

• Features Total: 125
• Features Observed: 67
• Catalog Usage: 53.6%

Top 7 Features:

1. arrowFunctions: 10.76481070662254
2. importDecls: 6.3037179813555415
3. return: 3.903456134608624
4. jsxElements: 3.7701082542337954
5. exportDecls_named: 2.1335660859972605
6. functions: 1.6001745644979453
7. if: 1.5638069607593557

---

next.js

• Features Total: 125
• Features Observed: 111
• Catalog Usage: 88.8%

Top 7 Features:

1. assignOp_=: 115.85912526735939
2. if: 56.880465514354874
3. return: 55.33068073181761
4. functions: 46.95433259116818
5. binaryOp_===: 44.20446206586859
6. logicalAND: 39.04190286346404
7. binaryOp_+: 33.24018456598985

---

chart.js

• Features Total: 125
• Features Observed: 77
• Catalog Usage: 61.6%

Top 7 Features:

1. assignOp_=: 38.835188142225036
2. functions: 32.87460841794756
3. return: 15.05381586806275
4. if: 13.274174477992174
5. binaryOp_+: 10.824120235497752
6. binaryOp_-: 7.715842465169005
7. ternary: 7.606138543863285

---

moment

• Features Total: 125
• Features Observed: 47
• Catalog Usage: 37.6%

Top 7 Features:

1. binaryOp_+: 36.853016066157416
2. functions: 35.1686608531062
3. return: 31.270420694472612
4. assignOp_=: 27.02854953919647
5. if: 16.72525293494671
6. binaryOp_===: 13.77903963586381
7. ternary: 13.457941819328962

---

mongoose

• Features Total: 125
• Features Observed: 76
• Catalog Usage: 60.8%

Top 7 Features:

1. functions: 58.72116856714994
2. awaitExpressions: 56.75515138332315
3. assignOp_=: 26.294434079862125
4. asyncFunctions: 22.420961926194877
5. arrowFunctions: 19.492851226878383
6. return: 10.566296609247809
7. arrayMethod_find: 4.935958035990663

---

debug

• Features Total: 125
• Features Observed: 35
• Catalog Usage: 28.0%

Top 7 Features:

1. assignOp_=: 83.76963350785341
2. arrowFunctions: 40.139616055846425
3. return: 32.28621291448517
4. if: 26.17801047120419
5. functions: 23.560209424083773
6. binaryOp_+: 21.81500872600349
7. logicalAND: 17.452006980802793

---

sveltekit

• Features Total: 125
• Features Observed: 93
• Catalog Usage: 74.4%

Top 7 Features:

1. awaitExpressions: 50.14166475227812
2. arrowFunctions: 40.83007887280802
3. if: 32.529290144727774
4. return: 27.597825254613674
5. importDecls: 20.644766061719885
6. exportDecls_named: 19.63396891033004
7. templateLiterals: 19.281721418179032

---

dotenv

• Features Total: 125
• Features Observed: 19
• Catalog Usage: 15.2%

Top 7 Features:

1. arrowFunctions: 4.0427535027967
2. assignOp_=: 3.655092208007975
3. catch: 0.6645622196378136
4. try: 0.6645622196378136
5. if: 0.4430414797585424
6. forOf: 0.3322811098189068
7. templateLiterals: 0.276900924849089

---

hexo

• Features Total: 125
• Features Observed: 50
• Catalog Usage: 40.0%

Top 7 Features:

1. arrowFunctions: 88.88379555351821
2. awaitExpressions: 55.32890213156085
3. binaryOp_+: 54.22874169149667
4. assignOp_=: 29.475131790052714
5. asyncFunctions: 25.30369012147605
6. importDecls: 20.628008251203298
7. return: 10.497364198945679

---

backbone

• Features Total: 125
• Features Observed: 45
• Catalog Usage: 36.0%

Top 7 Features:

1. functions: 80.69130612483214
2. assignOp_=: 51.90634670403457
3. return: 28.08431132130554
4. if: 26.683015122321482
5. binaryOp_===: 8.641326560401705
6. logicalAND: 7.648741752787996
7. logicalOR: 7.59035441116366

---

zx

• Features Total: 125
• Features Observed: 79
• Catalog Usage: 63.2%

Top 7 Features:

1. arrowFunctions: 33.839430780435876
2. templateLiterals: 27.00431396716903
3. awaitExpressions: 22.970474536388593
4. taggedTemplates: 18.040226343212506
5. asyncFunctions: 14.678693484228809
6. importDecls: 11.541262815844025
7. return: 11.149083982295927

---

prettier

• Features Total: 125
• Features Observed: 0
• Catalog Usage: 0.0%

---

airbnb-style-guide

• Features Total: 125
• Features Observed: 19
• Catalog Usage: 15.2%

Top 7 Features:

1. arrowFunctions: 10.12523314681588
2. assignOp_=: 9.858779642952305
3. if: 6.128430588862243
4. binaryOp_===: 5.329070077271516
5. return: 5.06261657340794
6. destructuringObject: 3.7303490540900612
7. arrayMethod_map: 3.1974420463629096

---

nuxt

• Features Total: 125
• Features Observed: 82
• Catalog Usage: 65.6%

Top 7 Features:

1. arrowFunctions: 64.42226988715844
2. awaitExpressions: 39.00027977245174
3. importDecls: 38.981628275669124
4. if: 38.42208337219062
5. return: 31.595635549752867
6. templateLiterals: 22.792129068357735
7. binaryOp_===: 19.50946563461718

---

zustand

• Features Total: 125
• Features Observed: 52
• Catalog Usage: 41.6%

Top 7 Features:

1. arrowFunctions: 56.86345526982977
2. return: 42.738138355668234
3. importDecls: 30.061571894241215
4. tsAsExpression: 27.16407098877218
5. if: 22.093444404201374
6. jsxElements: 18.471568272365083
7. assignOp_=: 15.57406736689605

---

htmx

• Features Total: 125
• Features Observed: 0
• Catalog Usage: 0.0%

---

koa

• Features Total: 125
• Features Observed: 35
• Catalog Usage: 28.0%

Top 7 Features:

1. arrowFunctions: 80.98459225854941
2. assignOp_=: 40.492296129274706
3. asyncFunctions: 7.609921082299887
4. awaitExpressions: 7.3280721533258175
5. destructuringObject: 7.3280721533258175
6. return: 6.106726794438181
7. binaryOp_===: 1.8789928598271326

---

node

• Features Total: 125
• Features Observed: 111
• Catalog Usage: 88.8%

Top 7 Features:

1. assignOp_=: 67.72673695892736
2. functions: 46.26182633275375
3. binaryOp_+: 44.418151187799296
4. arrowFunctions: 32.05059291794422
5. return: 25.894494659843865
6. if: 24.151243161053134

7. **binaryOp_

   **: 20.84305650954443

---

jquery

• Features Total: 125
• Features Observed: 63
• Catalog Usage: 50.4%

Top 7 Features:

1. functions: 60.67487098054784
2. assignOp_=: 56.35569670504168
3. binaryOp_+: 36.22072250893211
4. if: 29.29734021437078
5. return: 26.026200873362445
6. binaryOp_===: 14.545454545454545
7. logicalOR: 13.656212782850337

---

commander.js

• Features Total: 125
• Features Observed: 38
• Catalog Usage: 30.4%

Top 7 Features:

1. arrowFunctions: 79.69525766135935
2. assignOp_=: 10.957027906180448
3. destructuringObject: 6.03492552645095
4. return: 5.05050505050505
5. templateLiterals: 4.3656908063687725
6. functions: 4.280089025851738
7. interpolatedTemplates: 3.852080123266564

---

uni-app

• Features Total: 125
• Features Observed: 92
• Catalog Usage: 73.6%

Top 7 Features:

1. if: 54.181325065295276
2. assignOp_=: 44.93480181629291
3. return: 41.36500302607604
4. functions: 35.820972810625896
5. arrowFunctions: 29.221861538411748
6. templateLiterals: 23.056433890757038
7. importDecls: 19.227719503788258

---

ghost

• Features Total: 125
• Features Observed: 96
• Catalog Usage: 76.8%

Top 7 Features:

1. functions: 37.542335418341814
2. assignOp_=: 29.93675358262934
3. awaitExpressions: 27.322661153054938
4. return: 22.884621409103726
5. if: 17.21785379878798
6. templateLiterals: 16.568681710751196
7. arrowFunctions: 15.125883692031369

---

typescript

• Features Total: 125
• Features Observed: 113
• Catalog Usage: 90.4%

Top 7 Features:

1. binaryOp_/: 356.0988183626997
2. labels: 214.30733668380748
3. binaryOp_*: 53.44268017214996
4. assignOp_=: 42.51946481572068
5. functions: 34.77765535435385
6. binaryOp_-: 21.23406695824467
7. return: 19.72882302132563

---

parcel

• Features Total: 125
• Features Observed: 104
• Catalog Usage: 83.2%

Top 7 Features:

1. assignOp_=: 35.71632991815007
2. awaitExpressions: 34.87857800719114
3. functions: 32.27686399800188

4. **binaryOp_

   **: 23.00955869726976

5. importDecls: 19.408786508551835
6. binaryOp_<: 18.3993214729864
7. if: 17.837351247001525

---

axios

• Features Total: 125
• Features Observed: 76
• Catalog Usage: 60.8%

Top 7 Features:

1. functions: 101.8400300413068
2. assignOp_=: 38.37776943297033
3. arrowFunctions: 32.51971460758543
4. awaitExpressions: 20.05257228689448
5. return: 19.076229815996996
6. importDecls: 16.147202403304544
7. asyncFunctions: 13.89410439354112

---

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