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accessor-pairs.js
10.95
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array-bracket-newline.js
7.93
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array-bracket-spacing.js
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array-callback-return.js
12.6
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array-element-newline.js
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arrow-body-style.js
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arrow-parens.js
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arrow-spacing.js
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block-scoped-var.js
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block-spacing.js
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brace-style.js
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callback-return.js
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camelcase.js
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capitalized-comments.js
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class-methods-use-this.js
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comma-dangle.js
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comma-spacing.js
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comma-style.js
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complexity.js
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computed-property-spacing.js
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consistent-return.js
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consistent-this.js
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constructor-super.js
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curly.js
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default-case-last.js
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default-case.js
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default-param-last.js
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dot-location.js
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dot-notation.js
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eol-last.js
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eqeqeq.js
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for-direction.js
4.11
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func-call-spacing.js
8.1
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func-name-matching.js
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func-names.js
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func-style.js
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function-call-argument-newline...
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function-paren-newline.js
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generator-star-spacing.js
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getter-return.js
5.62
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global-require.js
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grouped-accessor-pairs.js
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guard-for-in.js
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handle-callback-err.js
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id-blacklist.js
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id-denylist.js
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id-length.js
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id-match.js
8.99
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implicit-arrow-linebreak.js
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indent-legacy.js
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indent.js
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index.js
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init-declarations.js
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jsx-quotes.js
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key-spacing.js
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keyword-spacing.js
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line-comment-position.js
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linebreak-style.js
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lines-around-comment.js
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lines-around-directive.js
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lines-between-class-members.js
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logical-assignment-operators.j...
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max-classes-per-file.js
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max-depth.js
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max-len.js
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max-lines-per-function.js
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max-lines.js
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max-nested-callbacks.js
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max-params.js
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max-statements-per-line.js
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max-statements.js
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multiline-comment-style.js
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multiline-ternary.js
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new-cap.js
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new-parens.js
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newline-after-var.js
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newline-before-return.js
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newline-per-chained-call.js
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no-alert.js
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no-array-constructor.js
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no-async-promise-executor.js
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no-await-in-loop.js
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no-bitwise.js
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no-buffer-constructor.js
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no-caller.js
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no-case-declarations.js
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no-catch-shadow.js
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no-class-assign.js
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no-compare-neg-zero.js
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no-cond-assign.js
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no-confusing-arrow.js
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no-console.js
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no-const-assign.js
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no-constant-binary-expression....
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no-constant-condition.js
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no-constructor-return.js
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no-continue.js
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no-control-regex.js
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no-debugger.js
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no-delete-var.js
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no-div-regex.js
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no-dupe-args.js
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no-dupe-class-members.js
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no-dupe-else-if.js
4.1
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no-dupe-keys.js
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no-duplicate-case.js
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no-duplicate-imports.js
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no-else-return.js
13.09
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no-empty-character-class.js
1.89
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no-empty-function.js
5.22
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no-empty-pattern.js
1.8
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no-empty-static-block.js
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no-empty.js
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no-eq-null.js
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no-eval.js
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no-ex-assign.js
1.27
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no-extend-native.js
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no-extra-bind.js
5.87
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no-extra-boolean-cast.js
10.34
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no-extra-label.js
4.17
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no-extra-parens.js
42.57
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no-extra-semi.js
4.52
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no-fallthrough.js
6.8
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no-floating-decimal.js
2.51
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no-func-assign.js
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no-global-assign.js
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no-implicit-coercion.js
12.3
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no-implicit-globals.js
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no-implied-eval.js
4.24
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no-import-assign.js
6.03
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no-inline-comments.js
2.63
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no-inner-declarations.js
3.15
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no-invalid-regexp.js
5.82
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no-invalid-this.js
4.38
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no-irregular-whitespace.js
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no-iterator.js
1.08
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no-label-var.js
2.01
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no-labels.js
3.29
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no-lone-blocks.js
3.24
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no-lonely-if.js
3.23
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no-loop-func.js
6.87
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no-loss-of-precision.js
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no-magic-numbers.js
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no-misleading-character-class....
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no-mixed-operators.js
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no-mixed-requires.js
6.23
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no-mixed-spaces-and-tabs.js
3.3
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no-multi-assign.js
1.3
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no-multi-spaces.js
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no-multi-str.js
1.57
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no-multiple-empty-lines.js
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no-native-reassign.js
2.7
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no-negated-condition.js
2.37
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no-negated-in-lhs.js
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no-nested-ternary.js
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no-new-func.js
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no-new-native-nonconstructor.j...
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no-new-object.js
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no-new-require.js
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no-new-symbol.js
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no-new-wrappers.js
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no-new.js
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no-nonoctal-decimal-escape.js
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no-obj-calls.js
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no-object-constructor.js
2.85
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no-octal-escape.js
1.15
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no-octal.js
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no-param-reassign.js
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no-path-concat.js
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no-plusplus.js
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no-process-env.js
1.6
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no-process-exit.js
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no-promise-executor-return.js
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no-proto.js
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no-prototype-builtins.js
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no-redeclare.js
4.32
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no-regex-spaces.js
5.15
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no-restricted-exports.js
5.5
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no-restricted-globals.js
3.72
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no-restricted-imports.js
19.02
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no-restricted-modules.js
5.98
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no-restricted-properties.js
5.81
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no-restricted-syntax.js
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no-return-assign.js
2.21
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no-return-await.js
4.35
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no-script-url.js
1.48
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no-self-assign.js
4.56
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no-self-compare.js
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no-sequences.js
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no-setter-return.js
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no-shadow-restricted-names.js
2.61
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no-shadow.js
16.95
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no-spaced-func.js
2.54
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no-sparse-arrays.js
1.45
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no-sync.js
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no-tabs.js
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no-template-curly-in-string.js
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no-ternary.js
785
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no-this-before-super.js
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no-throw-literal.js
1.06
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no-trailing-spaces.js
5.91
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no-unassigned-vars.js
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no-undef-init.js
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no-undef.js
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no-undefined.js
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no-underscore-dangle.js
9.31
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no-unexpected-multiline.js
3.4
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no-unmodified-loop-condition.j...
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no-unneeded-ternary.js
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no-unreachable-loop.js
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no-unreachable.js
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no-unsafe-finally.js
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no-unsafe-negation.js
3.88
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no-unsafe-optional-chaining.js
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no-unused-expressions.js
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no-unused-labels.js
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no-unused-private-class-member...
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no-unused-vars.js
47.41
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no-use-before-define.js
11.59
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no-useless-assignment.js
18.88
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no-useless-backreference.js
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no-useless-call.js
2.71
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no-useless-catch.js
1.28
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no-useless-computed-key.js
5.8
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no-useless-concat.js
2.9
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no-useless-constructor.js
6.82
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no-useless-escape.js
10.81
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no-useless-rename.js
4.81
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no-useless-return.js
11.67
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no-var.js
11.19
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no-void.js
1.33
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no-warning-comments.js
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no-whitespace-before-property....
3.79
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no-with.js
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nonblock-statement-body-positi...
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object-curly-newline.js
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object-curly-spacing.js
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object-property-newline.js
3.67
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object-shorthand.js
17.59
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one-var-declaration-per-line.j...
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one-var.js
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operator-assignment.js
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operator-linebreak.js
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padded-blocks.js
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padding-line-between-statement...
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prefer-arrow-callback.js
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prefer-const.js
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prefer-destructuring.js
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prefer-exponentiation-operator...
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prefer-named-capture-group.js
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prefer-numeric-literals.js
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prefer-object-has-own.js
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prefer-object-spread.js
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prefer-promise-reject-errors.j...
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prefer-reflect.js
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prefer-regex-literals.js
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prefer-rest-params.js
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prefer-spread.js
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prefer-template.js
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quote-props.js
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quotes.js
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radix.js
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require-atomic-updates.js
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require-await.js
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require-unicode-regexp.js
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require-yield.js
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rest-spread-spacing.js
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semi-spacing.js
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semi-style.js
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semi.js
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sort-imports.js
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sort-keys.js
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sort-vars.js
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space-before-blocks.js
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space-before-function-paren.js
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space-in-parens.js
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space-infix-ops.js
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space-unary-ops.js
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spaced-comment.js
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strict.js
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switch-colon-spacing.js
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symbol-description.js
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template-curly-spacing.js
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template-tag-spacing.js
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unicode-bom.js
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use-isnan.js
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valid-typeof.js
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vars-on-top.js
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wrap-iife.js
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wrap-regex.js
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yield-star-spacing.js
3.9
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yoda.js
9.48
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Code Editor : padding-line-between-statements.js
/** * @fileoverview Rule to require or disallow newlines between statements * @author Toru Nagashima * @deprecated in ESLint v8.53.0 */ "use strict"; //------------------------------------------------------------------------------ // Requirements //------------------------------------------------------------------------------ const astUtils = require("./utils/ast-utils"); //------------------------------------------------------------------------------ // Helpers //------------------------------------------------------------------------------ const LT = `[${Array.from(astUtils.LINEBREAKS).join("")}]`; const PADDING_LINE_SEQUENCE = new RegExp( String.raw`^(\s*?${LT})\s*${LT}(\s*;?)$`, "u", ); const CJS_EXPORT = /^(?:module\s*\.\s*)?exports(?:\s*\.|\s*\[|$)/u; const CJS_IMPORT = /^require\(/u; /** * Creates tester which check if a node starts with specific keyword. * @param {string} keyword The keyword to test. * @returns {Object} the created tester. * @private */ function newKeywordTester(keyword) { return { test: (node, sourceCode) => sourceCode.getFirstToken(node).value === keyword, }; } /** * Creates tester which check if a node starts with specific keyword and spans a single line. * @param {string} keyword The keyword to test. * @returns {Object} the created tester. * @private */ function newSinglelineKeywordTester(keyword) { return { test: (node, sourceCode) => node.loc.start.line === node.loc.end.line && sourceCode.getFirstToken(node).value === keyword, }; } /** * Creates tester which check if a node starts with specific keyword and spans multiple lines. * @param {string} keyword The keyword to test. * @returns {Object} the created tester. * @private */ function newMultilineKeywordTester(keyword) { return { test: (node, sourceCode) => node.loc.start.line !== node.loc.end.line && sourceCode.getFirstToken(node).value === keyword, }; } /** * Creates tester which check if a node is specific type. * @param {string} type The node type to test. * @returns {Object} the created tester. * @private */ function newNodeTypeTester(type) { return { test: node => node.type === type, }; } /** * Checks the given node is an expression statement of IIFE. * @param {ASTNode} node The node to check. * @returns {boolean} `true` if the node is an expression statement of IIFE. * @private */ function isIIFEStatement(node) { if (node.type === "ExpressionStatement") { let call = astUtils.skipChainExpression(node.expression); if (call.type === "UnaryExpression") { call = astUtils.skipChainExpression(call.argument); } return ( call.type === "CallExpression" && astUtils.isFunction(call.callee) ); } return false; } /** * Checks whether the given node is a block-like statement. * This checks the last token of the node is the closing brace of a block. * @param {SourceCode} sourceCode The source code to get tokens. * @param {ASTNode} node The node to check. * @returns {boolean} `true` if the node is a block-like statement. * @private */ function isBlockLikeStatement(sourceCode, node) { // do-while with a block is a block-like statement. if ( node.type === "DoWhileStatement" && node.body.type === "BlockStatement" ) { return true; } /* * IIFE is a block-like statement specially from * JSCS#disallowPaddingNewLinesAfterBlocks. */ if (isIIFEStatement(node)) { return true; } // Checks the last token is a closing brace of blocks. const lastToken = sourceCode.getLastToken( node, astUtils.isNotSemicolonToken, ); const belongingNode = lastToken && astUtils.isClosingBraceToken(lastToken) ? sourceCode.getNodeByRangeIndex(lastToken.range[0]) : null; return ( Boolean(belongingNode) && (belongingNode.type === "BlockStatement" || belongingNode.type === "SwitchStatement") ); } /** * Gets the actual last token. * * If a semicolon is semicolon-less style's semicolon, this ignores it. * For example: * * foo() * ;[1, 2, 3].forEach(bar) * @param {SourceCode} sourceCode The source code to get tokens. * @param {ASTNode} node The node to get. * @returns {Token} The actual last token. * @private */ function getActualLastToken(sourceCode, node) { const semiToken = sourceCode.getLastToken(node); const prevToken = sourceCode.getTokenBefore(semiToken); const nextToken = sourceCode.getTokenAfter(semiToken); const isSemicolonLessStyle = Boolean( prevToken && nextToken && prevToken.range[0] >= node.range[0] && astUtils.isSemicolonToken(semiToken) && semiToken.loc.start.line !== prevToken.loc.end.line && semiToken.loc.end.line === nextToken.loc.start.line, ); return isSemicolonLessStyle ? prevToken : semiToken; } /** * This returns the concatenation of the first 2 captured strings. * @param {string} _ Unused. Whole matched string. * @param {string} trailingSpaces The trailing spaces of the first line. * @param {string} indentSpaces The indentation spaces of the last line. * @returns {string} The concatenation of trailingSpaces and indentSpaces. * @private */ function replacerToRemovePaddingLines(_, trailingSpaces, indentSpaces) { return trailingSpaces + indentSpaces; } /** * Check and report statements for `any` configuration. * It does nothing. * @returns {void} * @private */ function verifyForAny() {} /** * Check and report statements for `never` configuration. * This autofix removes blank lines between the given 2 statements. * However, if comments exist between 2 blank lines, it does not remove those * blank lines automatically. * @param {RuleContext} context The rule context to report. * @param {ASTNode} _ Unused. The previous node to check. * @param {ASTNode} nextNode The next node to check. * @param {Array<Token[]>} paddingLines The array of token pairs that blank * lines exist between the pair. * @returns {void} * @private */ function verifyForNever(context, _, nextNode, paddingLines) { if (paddingLines.length === 0) { return; } context.report({ node: nextNode, messageId: "unexpectedBlankLine", fix(fixer) { if (paddingLines.length >= 2) { return null; } const prevToken = paddingLines[0][0]; const nextToken = paddingLines[0][1]; const start = prevToken.range[1]; const end = nextToken.range[0]; const text = context.sourceCode.text .slice(start, end) .replace(PADDING_LINE_SEQUENCE, replacerToRemovePaddingLines); return fixer.replaceTextRange([start, end], text); }, }); } /** * Check and report statements for `always` configuration. * This autofix inserts a blank line between the given 2 statements. * If the `prevNode` has trailing comments, it inserts a blank line after the * trailing comments. * @param {RuleContext} context The rule context to report. * @param {ASTNode} prevNode The previous node to check. * @param {ASTNode} nextNode The next node to check. * @param {Array<Token[]>} paddingLines The array of token pairs that blank * lines exist between the pair. * @returns {void} * @private */ function verifyForAlways(context, prevNode, nextNode, paddingLines) { if (paddingLines.length > 0) { return; } context.report({ node: nextNode, messageId: "expectedBlankLine", fix(fixer) { const sourceCode = context.sourceCode; let prevToken = getActualLastToken(sourceCode, prevNode); const nextToken = sourceCode.getFirstTokenBetween(prevToken, nextNode, { includeComments: true, /** * Skip the trailing comments of the previous node. * This inserts a blank line after the last trailing comment. * * For example: * * foo(); // trailing comment. * // comment. * bar(); * * Get fixed to: * * foo(); // trailing comment. * * // comment. * bar(); * @param {Token} token The token to check. * @returns {boolean} `true` if the token is not a trailing comment. * @private */ filter(token) { if (astUtils.isTokenOnSameLine(prevToken, token)) { prevToken = token; return false; } return true; }, }) || nextNode; const insertText = astUtils.isTokenOnSameLine(prevToken, nextToken) ? "\n\n" : "\n"; return fixer.insertTextAfter(prevToken, insertText); }, }); } /** * Types of blank lines. * `any`, `never`, and `always` are defined. * Those have `verify` method to check and report statements. * @private */ const PaddingTypes = { any: { verify: verifyForAny }, never: { verify: verifyForNever }, always: { verify: verifyForAlways }, }; /** * Types of statements. * Those have `test` method to check it matches to the given statement. * @private */ const StatementTypes = { "*": { test: () => true }, "block-like": { test: (node, sourceCode) => isBlockLikeStatement(sourceCode, node), }, "cjs-export": { test: (node, sourceCode) => node.type === "ExpressionStatement" && node.expression.type === "AssignmentExpression" && CJS_EXPORT.test(sourceCode.getText(node.expression.left)), }, "cjs-import": { test: (node, sourceCode) => node.type === "VariableDeclaration" && node.declarations.length > 0 && Boolean(node.declarations[0].init) && CJS_IMPORT.test(sourceCode.getText(node.declarations[0].init)), }, directive: { test: astUtils.isDirective, }, expression: { test: node => node.type === "ExpressionStatement" && !astUtils.isDirective(node), }, iife: { test: isIIFEStatement, }, "multiline-block-like": { test: (node, sourceCode) => node.loc.start.line !== node.loc.end.line && isBlockLikeStatement(sourceCode, node), }, "multiline-expression": { test: node => node.loc.start.line !== node.loc.end.line && node.type === "ExpressionStatement" && !astUtils.isDirective(node), }, "multiline-const": newMultilineKeywordTester("const"), "multiline-let": newMultilineKeywordTester("let"), "multiline-var": newMultilineKeywordTester("var"), "singleline-const": newSinglelineKeywordTester("const"), "singleline-let": newSinglelineKeywordTester("let"), "singleline-var": newSinglelineKeywordTester("var"), block: newNodeTypeTester("BlockStatement"), empty: newNodeTypeTester("EmptyStatement"), function: newNodeTypeTester("FunctionDeclaration"), break: newKeywordTester("break"), case: newKeywordTester("case"), class: newKeywordTester("class"), const: newKeywordTester("const"), continue: newKeywordTester("continue"), debugger: newKeywordTester("debugger"), default: newKeywordTester("default"), do: newKeywordTester("do"), export: newKeywordTester("export"), for: newKeywordTester("for"), if: newKeywordTester("if"), import: newKeywordTester("import"), let: newKeywordTester("let"), return: newKeywordTester("return"), switch: newKeywordTester("switch"), throw: newKeywordTester("throw"), try: newKeywordTester("try"), var: newKeywordTester("var"), while: newKeywordTester("while"), with: newKeywordTester("with"), }; //------------------------------------------------------------------------------ // Rule Definition //------------------------------------------------------------------------------ /** @type {import('../types').Rule.RuleModule} */ module.exports = { meta: { deprecated: { message: "Formatting rules are being moved out of ESLint core.", url: "https://eslint.org/blog/2023/10/deprecating-formatting-rules/", deprecatedSince: "8.53.0", availableUntil: "10.0.0", replacedBy: [ { message: "ESLint Stylistic now maintains deprecated stylistic core rules.", url: "https://eslint.style/guide/migration", plugin: { name: "@stylistic/eslint-plugin", url: "https://eslint.style", }, rule: { name: "padding-line-between-statements", url: "https://eslint.style/rules/padding-line-between-statements", }, }, ], }, type: "layout", docs: { description: "Require or disallow padding lines between statements", recommended: false, url: "https://eslint.org/docs/latest/rules/padding-line-between-statements", }, fixable: "whitespace", schema: { definitions: { paddingType: { enum: Object.keys(PaddingTypes), }, statementType: { anyOf: [ { enum: Object.keys(StatementTypes) }, { type: "array", items: { enum: Object.keys(StatementTypes) }, minItems: 1, uniqueItems: true, }, ], }, }, type: "array", items: { type: "object", properties: { blankLine: { $ref: "#/definitions/paddingType" }, prev: { $ref: "#/definitions/statementType" }, next: { $ref: "#/definitions/statementType" }, }, additionalProperties: false, required: ["blankLine", "prev", "next"], }, }, messages: { unexpectedBlankLine: "Unexpected blank line before this statement.", expectedBlankLine: "Expected blank line before this statement.", }, }, create(context) { const sourceCode = context.sourceCode; const configureList = context.options || []; let scopeInfo = null; /** * Processes to enter to new scope. * This manages the current previous statement. * @returns {void} * @private */ function enterScope() { scopeInfo = { upper: scopeInfo, prevNode: null, }; } /** * Processes to exit from the current scope. * @returns {void} * @private */ function exitScope() { scopeInfo = scopeInfo.upper; } /** * Checks whether the given node matches the given type. * @param {ASTNode} node The statement node to check. * @param {string|string[]} type The statement type to check. * @returns {boolean} `true` if the statement node matched the type. * @private */ function match(node, type) { let innerStatementNode = node; while (innerStatementNode.type === "LabeledStatement") { innerStatementNode = innerStatementNode.body; } if (Array.isArray(type)) { return type.some(match.bind(null, innerStatementNode)); } return StatementTypes[type].test(innerStatementNode, sourceCode); } /** * Finds the last matched configure from configureList. * @param {ASTNode} prevNode The previous statement to match. * @param {ASTNode} nextNode The current statement to match. * @returns {Object} The tester of the last matched configure. * @private */ function getPaddingType(prevNode, nextNode) { for (let i = configureList.length - 1; i >= 0; --i) { const configure = configureList[i]; const matched = match(prevNode, configure.prev) && match(nextNode, configure.next); if (matched) { return PaddingTypes[configure.blankLine]; } } return PaddingTypes.any; } /** * Gets padding line sequences between the given 2 statements. * Comments are separators of the padding line sequences. * @param {ASTNode} prevNode The previous statement to count. * @param {ASTNode} nextNode The current statement to count. * @returns {Array<Token[]>} The array of token pairs. * @private */ function getPaddingLineSequences(prevNode, nextNode) { const pairs = []; let prevToken = getActualLastToken(sourceCode, prevNode); if (nextNode.loc.start.line - prevToken.loc.end.line >= 2) { do { const token = sourceCode.getTokenAfter(prevToken, { includeComments: true, }); if (token.loc.start.line - prevToken.loc.end.line >= 2) { pairs.push([prevToken, token]); } prevToken = token; } while (prevToken.range[0] < nextNode.range[0]); } return pairs; } /** * Verify padding lines between the given node and the previous node. * @param {ASTNode} node The node to verify. * @returns {void} * @private */ function verify(node) { const parentType = node.parent.type; const validParent = astUtils.STATEMENT_LIST_PARENTS.has(parentType) || parentType === "SwitchStatement"; if (!validParent) { return; } // Save this node as the current previous statement. const prevNode = scopeInfo.prevNode; // Verify. if (prevNode) { const type = getPaddingType(prevNode, node); const paddingLines = getPaddingLineSequences(prevNode, node); type.verify(context, prevNode, node, paddingLines); } scopeInfo.prevNode = node; } /** * Verify padding lines between the given node and the previous node. * Then process to enter to new scope. * @param {ASTNode} node The node to verify. * @returns {void} * @private */ function verifyThenEnterScope(node) { verify(node); enterScope(); } return { Program: enterScope, BlockStatement: enterScope, SwitchStatement: enterScope, StaticBlock: enterScope, "Program:exit": exitScope, "BlockStatement:exit": exitScope, "SwitchStatement:exit": exitScope, "StaticBlock:exit": exitScope, ":statement": verify, SwitchCase: verifyThenEnterScope, "SwitchCase:exit": exitScope, }; }, };
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