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accessor-pairs.js
10.95
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array-bracket-newline.js
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array-bracket-spacing.js
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array-callback-return.js
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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
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func-call-spacing.js
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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-paren-newline.js
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generator-star-spacing.js
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getter-return.js
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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
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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-case-declarations.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
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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
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no-empty-character-class.js
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no-empty-function.js
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no-empty-pattern.js
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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
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no-extend-native.js
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no-extra-bind.js
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no-extra-boolean-cast.js
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no-extra-label.js
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no-extra-parens.js
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no-extra-semi.js
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no-fallthrough.js
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no-floating-decimal.js
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no-func-assign.js
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no-global-assign.js
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no-implicit-coercion.js
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no-implicit-globals.js
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no-implied-eval.js
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no-import-assign.js
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no-inline-comments.js
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no-inner-declarations.js
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no-invalid-regexp.js
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no-invalid-this.js
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no-irregular-whitespace.js
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no-iterator.js
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no-label-var.js
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no-labels.js
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no-lone-blocks.js
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no-lonely-if.js
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no-loop-func.js
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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
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no-mixed-spaces-and-tabs.js
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no-multi-assign.js
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no-multi-spaces.js
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no-multi-str.js
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no-multiple-empty-lines.js
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no-native-reassign.js
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no-negated-condition.js
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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
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no-octal-escape.js
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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
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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
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no-regex-spaces.js
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no-restricted-exports.js
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no-restricted-globals.js
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no-restricted-imports.js
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no-restricted-modules.js
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no-restricted-properties.js
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no-restricted-syntax.js
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no-return-assign.js
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no-return-await.js
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no-script-url.js
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no-self-assign.js
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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
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no-shadow.js
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no-spaced-func.js
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no-sparse-arrays.js
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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
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no-this-before-super.js
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no-throw-literal.js
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no-trailing-spaces.js
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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
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no-unexpected-multiline.js
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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
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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-vars.js
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no-use-before-define.js
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no-useless-assignment.js
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no-useless-backreference.js
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no-useless-call.js
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no-useless-catch.js
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no-useless-computed-key.js
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no-useless-concat.js
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no-useless-constructor.js
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no-useless-escape.js
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no-useless-rename.js
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no-useless-return.js
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no-var.js
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no-void.js
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no-warning-comments.js
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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
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object-shorthand.js
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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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prefer-arrow-callback.js
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prefer-const.js
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prefer-destructuring.js
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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-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-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 : lines-between-class-members.js
/** * @fileoverview Rule to check empty newline between class members * @author 薛定谔的猫<hh_2013@foxmail.com> * @deprecated in ESLint v8.53.0 */ "use strict"; //------------------------------------------------------------------------------ // Requirements //------------------------------------------------------------------------------ const astUtils = require("./utils/ast-utils"); //------------------------------------------------------------------------------ // Helpers //------------------------------------------------------------------------------ /** * Types of class members. * Those have `test` method to check it matches to the given class member. * @private */ const ClassMemberTypes = { "*": { test: () => true }, field: { test: node => node.type === "PropertyDefinition" }, method: { test: node => node.type === "MethodDefinition" }, }; //------------------------------------------------------------------------------ // 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: "lines-between-class-members", url: "https://eslint.style/rules/lines-between-class-members", }, }, ], }, type: "layout", docs: { description: "Require or disallow an empty line between class members", recommended: false, url: "https://eslint.org/docs/latest/rules/lines-between-class-members", }, fixable: "whitespace", schema: [ { anyOf: [ { type: "object", properties: { enforce: { type: "array", items: { type: "object", properties: { blankLine: { enum: ["always", "never"], }, prev: { enum: ["method", "field", "*"], }, next: { enum: ["method", "field", "*"], }, }, additionalProperties: false, required: ["blankLine", "prev", "next"], }, minItems: 1, }, }, additionalProperties: false, required: ["enforce"], }, { enum: ["always", "never"], }, ], }, { type: "object", properties: { exceptAfterSingleLine: { type: "boolean", default: false, }, }, additionalProperties: false, }, ], messages: { never: "Unexpected blank line between class members.", always: "Expected blank line between class members.", }, }, create(context) { const options = []; options[0] = context.options[0] || "always"; options[1] = context.options[1] || { exceptAfterSingleLine: false }; const configureList = typeof options[0] === "object" ? options[0].enforce : [{ blankLine: options[0], prev: "*", next: "*" }]; const sourceCode = context.sourceCode; /** * Gets a pair of tokens that should be used to check lines between two class member nodes. * * In most cases, this returns the very last token of the current node and * the very first token of the next node. * For example: * * class C { * x = 1; // curLast: `;` nextFirst: `in` * in = 2 * } * * There is only one exception. If the given node ends with a semicolon, and it looks like * a semicolon-less style's semicolon - one that is not on the same line as the preceding * token, but is on the line where the next class member starts - this returns the preceding * token and the semicolon as boundary tokens. * For example: * * class C { * x = 1 // curLast: `1` nextFirst: `;` * ;in = 2 * } * When determining the desired layout of the code, we should treat this semicolon as * a part of the next class member node instead of the one it technically belongs to. * @param {ASTNode} curNode Current class member node. * @param {ASTNode} nextNode Next class member node. * @returns {Token} The actual last token of `node`. * @private */ function getBoundaryTokens(curNode, nextNode) { const lastToken = sourceCode.getLastToken(curNode); const prevToken = sourceCode.getTokenBefore(lastToken); const nextToken = sourceCode.getFirstToken(nextNode); // skip possible lone `;` between nodes const isSemicolonLessStyle = astUtils.isSemicolonToken(lastToken) && !astUtils.isTokenOnSameLine(prevToken, lastToken) && astUtils.isTokenOnSameLine(lastToken, nextToken); return isSemicolonLessStyle ? { curLast: prevToken, nextFirst: lastToken } : { curLast: lastToken, nextFirst: nextToken }; } /** * Return the last token among the consecutive tokens that have no exceed max line difference in between, before the first token in the next member. * @param {Token} prevLastToken The last token in the previous member node. * @param {Token} nextFirstToken The first token in the next member node. * @param {number} maxLine The maximum number of allowed line difference between consecutive tokens. * @returns {Token} The last token among the consecutive tokens. */ function findLastConsecutiveTokenAfter( prevLastToken, nextFirstToken, maxLine, ) { const after = sourceCode.getTokenAfter(prevLastToken, { includeComments: true, }); if ( after !== nextFirstToken && after.loc.start.line - prevLastToken.loc.end.line <= maxLine ) { return findLastConsecutiveTokenAfter( after, nextFirstToken, maxLine, ); } return prevLastToken; } /** * Return the first token among the consecutive tokens that have no exceed max line difference in between, after the last token in the previous member. * @param {Token} nextFirstToken The first token in the next member node. * @param {Token} prevLastToken The last token in the previous member node. * @param {number} maxLine The maximum number of allowed line difference between consecutive tokens. * @returns {Token} The first token among the consecutive tokens. */ function findFirstConsecutiveTokenBefore( nextFirstToken, prevLastToken, maxLine, ) { const before = sourceCode.getTokenBefore(nextFirstToken, { includeComments: true, }); if ( before !== prevLastToken && nextFirstToken.loc.start.line - before.loc.end.line <= maxLine ) { return findFirstConsecutiveTokenBefore( before, prevLastToken, maxLine, ); } return nextFirstToken; } /** * Checks if there is a token or comment between two tokens. * @param {Token} before The token before. * @param {Token} after The token after. * @returns {boolean} True if there is a token or comment between two tokens. */ function hasTokenOrCommentBetween(before, after) { return ( sourceCode.getTokensBetween(before, after, { includeComments: true, }).length !== 0 ); } /** * Checks whether the given node matches the given type. * @param {ASTNode} node The class member node to check. * @param {string} type The class member type to check. * @returns {boolean} `true` if the class member node matched the type. * @private */ function match(node, type) { return ClassMemberTypes[type].test(node); } /** * Finds the last matched configuration from the configureList. * @param {ASTNode} prevNode The previous node to match. * @param {ASTNode} nextNode The current node to match. * @returns {string|null} Padding type or `null` if no matches were found. * @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 configure.blankLine; } } return null; } return { ClassBody(node) { const body = node.body; for (let i = 0; i < body.length - 1; i++) { const curFirst = sourceCode.getFirstToken(body[i]); const { curLast, nextFirst } = getBoundaryTokens( body[i], body[i + 1], ); const isMulti = !astUtils.isTokenOnSameLine( curFirst, curLast, ); const skip = !isMulti && options[1].exceptAfterSingleLine; const beforePadding = findLastConsecutiveTokenAfter( curLast, nextFirst, 1, ); const afterPadding = findFirstConsecutiveTokenBefore( nextFirst, curLast, 1, ); const isPadded = afterPadding.loc.start.line - beforePadding.loc.end.line > 1; const hasTokenInPadding = hasTokenOrCommentBetween( beforePadding, afterPadding, ); const curLineLastToken = findLastConsecutiveTokenAfter( curLast, nextFirst, 0, ); const paddingType = getPaddingType(body[i], body[i + 1]); if (paddingType === "never" && isPadded) { context.report({ node: body[i + 1], messageId: "never", fix(fixer) { if (hasTokenInPadding) { return null; } return fixer.replaceTextRange( [ beforePadding.range[1], afterPadding.range[0], ], "\n", ); }, }); } else if (paddingType === "always" && !skip && !isPadded) { context.report({ node: body[i + 1], messageId: "always", fix(fixer) { if (hasTokenInPadding) { return null; } return fixer.insertTextAfter( curLineLastToken, "\n", ); }, }); } } }, }; }, };
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