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accessor-pairs.js
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array-bracket-newline.js
9.45
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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-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-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-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-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-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-sync.js
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no-tabs.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-undef.js
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no-unexpected-multiline.js
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no-unreachable-loop.js
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no-unreachable.js
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no-unsafe-negation.js
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no-unsafe-optional-chaining.js
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no-unused-vars.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-with.js
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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.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-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-jsdoc.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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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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valid-jsdoc.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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Code Editor : accessor-pairs.js
/** * @fileoverview Rule to enforce getter and setter pairs in objects and classes. * @author Gyandeep Singh */ "use strict"; //------------------------------------------------------------------------------ // Requirements //------------------------------------------------------------------------------ const astUtils = require("./utils/ast-utils"); //------------------------------------------------------------------------------ // Typedefs //------------------------------------------------------------------------------ /** * Property name if it can be computed statically, otherwise the list of the tokens of the key node. * @typedef {string|Token[]} Key */ /** * Accessor nodes with the same key. * @typedef {Object} AccessorData * @property {Key} key Accessor's key * @property {ASTNode[]} getters List of getter nodes. * @property {ASTNode[]} setters List of setter nodes. */ //------------------------------------------------------------------------------ // Helpers //------------------------------------------------------------------------------ /** * Checks whether or not the given lists represent the equal tokens in the same order. * Tokens are compared by their properties, not by instance. * @param {Token[]} left First list of tokens. * @param {Token[]} right Second list of tokens. * @returns {boolean} `true` if the lists have same tokens. */ function areEqualTokenLists(left, right) { if (left.length !== right.length) { return false; } for (let i = 0; i < left.length; i++) { const leftToken = left[i], rightToken = right[i]; if (leftToken.type !== rightToken.type || leftToken.value !== rightToken.value) { return false; } } return true; } /** * Checks whether or not the given keys are equal. * @param {Key} left First key. * @param {Key} right Second key. * @returns {boolean} `true` if the keys are equal. */ function areEqualKeys(left, right) { if (typeof left === "string" && typeof right === "string") { // Statically computed names. return left === right; } if (Array.isArray(left) && Array.isArray(right)) { // Token lists. return areEqualTokenLists(left, right); } return false; } /** * Checks whether or not a given node is of an accessor kind ('get' or 'set'). * @param {ASTNode} node A node to check. * @returns {boolean} `true` if the node is of an accessor kind. */ function isAccessorKind(node) { return node.kind === "get" || node.kind === "set"; } /** * Checks whether or not a given node is an argument of a specified method call. * @param {ASTNode} node A node to check. * @param {number} index An expected index of the node in arguments. * @param {string} object An expected name of the object of the method. * @param {string} property An expected name of the method. * @returns {boolean} `true` if the node is an argument of the specified method call. */ function isArgumentOfMethodCall(node, index, object, property) { const parent = node.parent; return ( parent.type === "CallExpression" && astUtils.isSpecificMemberAccess(parent.callee, object, property) && parent.arguments[index] === node ); } /** * Checks whether or not a given node is a property descriptor. * @param {ASTNode} node A node to check. * @returns {boolean} `true` if the node is a property descriptor. */ function isPropertyDescriptor(node) { // Object.defineProperty(obj, "foo", {set: ...}) if (isArgumentOfMethodCall(node, 2, "Object", "defineProperty") || isArgumentOfMethodCall(node, 2, "Reflect", "defineProperty") ) { return true; } /* * Object.defineProperties(obj, {foo: {set: ...}}) * Object.create(proto, {foo: {set: ...}}) */ const grandparent = node.parent.parent; return grandparent.type === "ObjectExpression" && ( isArgumentOfMethodCall(grandparent, 1, "Object", "create") || isArgumentOfMethodCall(grandparent, 1, "Object", "defineProperties") ); } //------------------------------------------------------------------------------ // Rule Definition //------------------------------------------------------------------------------ /** @type {import('../shared/types').Rule} */ module.exports = { meta: { type: "suggestion", docs: { description: "Enforce getter and setter pairs in objects and classes", recommended: false, url: "https://eslint.org/docs/latest/rules/accessor-pairs" }, schema: [{ type: "object", properties: { getWithoutSet: { type: "boolean", default: false }, setWithoutGet: { type: "boolean", default: true }, enforceForClassMembers: { type: "boolean", default: true } }, additionalProperties: false }], messages: { missingGetterInPropertyDescriptor: "Getter is not present in property descriptor.", missingSetterInPropertyDescriptor: "Setter is not present in property descriptor.", missingGetterInObjectLiteral: "Getter is not present for {{ name }}.", missingSetterInObjectLiteral: "Setter is not present for {{ name }}.", missingGetterInClass: "Getter is not present for class {{ name }}.", missingSetterInClass: "Setter is not present for class {{ name }}." } }, create(context) { const config = context.options[0] || {}; const checkGetWithoutSet = config.getWithoutSet === true; const checkSetWithoutGet = config.setWithoutGet !== false; const enforceForClassMembers = config.enforceForClassMembers !== false; const sourceCode = context.sourceCode; /** * Reports the given node. * @param {ASTNode} node The node to report. * @param {string} messageKind "missingGetter" or "missingSetter". * @returns {void} * @private */ function report(node, messageKind) { if (node.type === "Property") { context.report({ node, messageId: `${messageKind}InObjectLiteral`, loc: astUtils.getFunctionHeadLoc(node.value, sourceCode), data: { name: astUtils.getFunctionNameWithKind(node.value) } }); } else if (node.type === "MethodDefinition") { context.report({ node, messageId: `${messageKind}InClass`, loc: astUtils.getFunctionHeadLoc(node.value, sourceCode), data: { name: astUtils.getFunctionNameWithKind(node.value) } }); } else { context.report({ node, messageId: `${messageKind}InPropertyDescriptor` }); } } /** * Reports each of the nodes in the given list using the same messageId. * @param {ASTNode[]} nodes Nodes to report. * @param {string} messageKind "missingGetter" or "missingSetter". * @returns {void} * @private */ function reportList(nodes, messageKind) { for (const node of nodes) { report(node, messageKind); } } /** * Checks accessor pairs in the given list of nodes. * @param {ASTNode[]} nodes The list to check. * @returns {void} * @private */ function checkList(nodes) { const accessors = []; let found = false; for (let i = 0; i < nodes.length; i++) { const node = nodes[i]; if (isAccessorKind(node)) { // Creates a new `AccessorData` object for the given getter or setter node. const name = astUtils.getStaticPropertyName(node); const key = (name !== null) ? name : sourceCode.getTokens(node.key); // Merges the given `AccessorData` object into the given accessors list. for (let j = 0; j < accessors.length; j++) { const accessor = accessors[j]; if (areEqualKeys(accessor.key, key)) { accessor.getters.push(...node.kind === "get" ? [node] : []); accessor.setters.push(...node.kind === "set" ? [node] : []); found = true; break; } } if (!found) { accessors.push({ key, getters: node.kind === "get" ? [node] : [], setters: node.kind === "set" ? [node] : [] }); } found = false; } } for (const { getters, setters } of accessors) { if (checkSetWithoutGet && setters.length && !getters.length) { reportList(setters, "missingGetter"); } if (checkGetWithoutSet && getters.length && !setters.length) { reportList(getters, "missingSetter"); } } } /** * Checks accessor pairs in an object literal. * @param {ASTNode} node `ObjectExpression` node to check. * @returns {void} * @private */ function checkObjectLiteral(node) { checkList(node.properties.filter(p => p.type === "Property")); } /** * Checks accessor pairs in a property descriptor. * @param {ASTNode} node Property descriptor `ObjectExpression` node to check. * @returns {void} * @private */ function checkPropertyDescriptor(node) { const namesToCheck = new Set(node.properties .filter(p => p.type === "Property" && p.kind === "init" && !p.computed) .map(({ key }) => key.name)); const hasGetter = namesToCheck.has("get"); const hasSetter = namesToCheck.has("set"); if (checkSetWithoutGet && hasSetter && !hasGetter) { report(node, "missingGetter"); } if (checkGetWithoutSet && hasGetter && !hasSetter) { report(node, "missingSetter"); } } /** * Checks the given object expression as an object literal and as a possible property descriptor. * @param {ASTNode} node `ObjectExpression` node to check. * @returns {void} * @private */ function checkObjectExpression(node) { checkObjectLiteral(node); if (isPropertyDescriptor(node)) { checkPropertyDescriptor(node); } } /** * Checks the given class body. * @param {ASTNode} node `ClassBody` node to check. * @returns {void} * @private */ function checkClassBody(node) { const methodDefinitions = node.body.filter(m => m.type === "MethodDefinition"); checkList(methodDefinitions.filter(m => m.static)); checkList(methodDefinitions.filter(m => !m.static)); } const listeners = {}; if (checkSetWithoutGet || checkGetWithoutSet) { listeners.ObjectExpression = checkObjectExpression; if (enforceForClassMembers) { listeners.ClassBody = checkClassBody; } } return listeners; } };
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