Gecko [ c.stage.kornherr.net ]

Name	Size	Permission	Date
utils	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
accessor-pairs.js	12.41 KB	-rw-r--r--	2019-09-14 01:35
array-bracket-newline.js	9.43 KB	-rw-r--r--	2019-09-14 01:35
array-bracket-spacing.js	8.85 KB	-rw-r--r--	2019-09-14 01:35
array-callback-return.js	7.98 KB	-rw-r--r--	2019-09-14 01:35
array-element-newline.js	9.22 KB	-rw-r--r--	2023-12-15 20:21
arrow-body-style.js	10.27 KB	-rw-r--r--	2019-09-14 01:35
arrow-parens.js	6.38 KB	-rw-r--r--	2019-09-14 01:35
arrow-spacing.js	5.08 KB	-rw-r--r--	2019-09-14 01:35
block-scoped-var.js	3.58 KB	-rw-r--r--	2019-09-14 01:35
block-spacing.js	4.99 KB	-rw-r--r--	2019-09-14 01:35
brace-style.js	7.71 KB	-rw-r--r--	2019-09-14 01:35
callback-return.js	6.33 KB	-rw-r--r--	2019-09-14 01:35
camelcase.js	8.29 KB	-rw-r--r--	2019-09-14 01:35
capitalized-comments.js	10.68 KB	-rw-r--r--	2023-12-15 20:21
class-methods-use-this.js	3.81 KB	-rw-r--r--	2019-09-14 01:35
comma-dangle.js	11.75 KB	-rw-r--r--	2019-09-14 01:35
comma-spacing.js	6.53 KB	-rw-r--r--	2019-09-14 01:35
comma-style.js	11.78 KB	-rw-r--r--	2019-09-14 01:35
complexity.js	4.94 KB	-rw-r--r--	2019-09-14 01:35
computed-property-spacing.js	7.17 KB	-rw-r--r--	2019-09-14 01:35
consistent-return.js	6.59 KB	-rw-r--r--	2019-09-14 01:35
consistent-this.js	4.86 KB	-rw-r--r--	2019-09-14 01:35
constructor-super.js	13.49 KB	-rw-r--r--	2019-09-14 01:35
curly.js	16.24 KB	-rw-r--r--	2019-09-14 01:35
default-case.js	2.76 KB	-rw-r--r--	2019-09-14 01:35
default-param-last.js	1.5 KB	-rw-r--r--	2019-09-14 01:35
dot-location.js	3.34 KB	-rw-r--r--	2019-09-14 01:35
dot-notation.js	6.47 KB	-rw-r--r--	2019-09-14 01:35
eol-last.js	3.79 KB	-rw-r--r--	2019-09-14 01:35
eqeqeq.js	5.55 KB	-rw-r--r--	2023-12-15 20:21
for-direction.js	4.27 KB	-rw-r--r--	2019-09-14 01:35
func-call-spacing.js	7.29 KB	-rw-r--r--	2019-09-14 01:35
func-name-matching.js	9.84 KB	-rw-r--r--	2023-12-15 20:21
func-names.js	6.09 KB	-rw-r--r--	2023-12-15 20:21
func-style.js	2.84 KB	-rw-r--r--	2019-09-14 01:35
function-call-argument-newline.js	4.13 KB	-rw-r--r--	2019-09-14 01:35
function-paren-newline.js	11.15 KB	-rw-r--r--	2019-09-14 01:35
generator-star-spacing.js	6.98 KB	-rw-r--r--	2019-09-14 01:35
getter-return.js	6.02 KB	-rw-r--r--	2019-09-14 01:35
global-require.js	2.3 KB	-rw-r--r--	2019-09-14 01:35
guard-for-in.js	2.3 KB	-rw-r--r--	2019-09-14 01:35
handle-callback-err.js	2.92 KB	-rw-r--r--	2019-09-14 01:35
id-blacklist.js	4.05 KB	-rw-r--r--	2019-09-14 01:35
id-length.js	4.12 KB	-rw-r--r--	2019-09-14 01:35
id-match.js	8.14 KB	-rw-r--r--	2019-09-14 01:35
implicit-arrow-linebreak.js	2.79 KB	-rw-r--r--	2019-09-14 01:35
indent-legacy.js	44.45 KB	-rw-r--r--	2019-09-14 01:35
indent.js	68.68 KB	-rw-r--r--	2019-09-14 01:35
index.js	16.34 KB	-rw-r--r--	2019-09-14 01:35
init-declarations.js	4.37 KB	-rw-r--r--	2019-09-14 01:35
jsx-quotes.js	2.89 KB	-rw-r--r--	2019-09-14 01:35
key-spacing.js	24.82 KB	-rw-r--r--	2019-09-14 01:35
keyword-spacing.js	21.2 KB	-rw-r--r--	2019-09-14 01:35
line-comment-position.js	4.08 KB	-rw-r--r--	2019-09-14 01:35
linebreak-style.js	3.17 KB	-rw-r--r--	2019-09-14 01:35
lines-around-comment.js	15.54 KB	-rw-r--r--	2019-09-14 01:35
lines-around-directive.js	7.58 KB	-rw-r--r--	2019-09-14 01:35
lines-between-class-members.js	5.05 KB	-rw-r--r--	2019-09-14 01:35
max-classes-per-file.js	1.73 KB	-rw-r--r--	2019-09-14 01:35
max-depth.js	4.59 KB	-rw-r--r--	2019-09-14 01:35
max-len.js	13.8 KB	-rw-r--r--	2019-09-14 01:35
max-lines-per-function.js	6.89 KB	-rw-r--r--	2019-09-14 01:35
max-lines.js	4.59 KB	-rw-r--r--	2019-09-14 01:35
max-nested-callbacks.js	3.47 KB	-rw-r--r--	2019-09-14 01:35
max-params.js	3.07 KB	-rw-r--r--	2019-09-14 01:35
max-statements-per-line.js	7.31 KB	-rw-r--r--	2019-09-14 01:35
max-statements.js	5.4 KB	-rw-r--r--	2019-09-14 01:35
multiline-comment-style.js	14.42 KB	-rw-r--r--	2019-09-14 01:35
multiline-ternary.js	3.42 KB	-rw-r--r--	2019-09-14 01:35
new-cap.js	9.44 KB	-rw-r--r--	2019-09-14 01:35
new-parens.js	3.14 KB	-rw-r--r--	2019-09-14 01:35
newline-after-var.js	9.6 KB	-rw-r--r--	2019-09-14 01:35
newline-before-return.js	7.89 KB	-rw-r--r--	2019-09-14 01:35
newline-per-chained-call.js	3.56 KB	-rw-r--r--	2019-09-14 01:35
no-alert.js	3.96 KB	-rw-r--r--	2019-09-14 01:35
no-array-constructor.js	1.36 KB	-rw-r--r--	2019-09-14 01:35
no-async-promise-executor.js	1.1 KB	-rw-r--r--	2019-09-14 01:35
no-await-in-loop.js	2.72 KB	-rw-r--r--	2019-09-14 01:35
no-bitwise.js	3.51 KB	-rw-r--r--	2019-09-14 01:35
no-buffer-constructor.js	1.31 KB	-rw-r--r--	2019-09-14 01:35
no-caller.js	1.17 KB	-rw-r--r--	2019-09-14 01:35
no-case-declarations.js	1.82 KB	-rw-r--r--	2019-09-14 01:35
no-catch-shadow.js	2.44 KB	-rw-r--r--	2019-09-14 01:35
no-class-assign.js	1.67 KB	-rw-r--r--	2019-09-14 01:35
no-compare-neg-zero.js	1.9 KB	-rw-r--r--	2019-09-14 01:35
no-cond-assign.js	5.04 KB	-rw-r--r--	2019-09-14 01:35
no-confusing-arrow.js	2.55 KB	-rw-r--r--	2019-09-14 01:35
no-console.js	4.21 KB	-rw-r--r--	2019-09-14 01:35
no-const-assign.js	1.46 KB	-rw-r--r--	2019-09-14 01:35
no-constant-condition.js	8.48 KB	-rw-r--r--	2019-09-14 01:35
no-continue.js	875 B	-rw-r--r--	2019-09-14 01:35
no-control-regex.js	3.14 KB	-rw-r--r--	2019-09-14 01:35
no-debugger.js	947 B	-rw-r--r--	2019-09-14 01:35
no-delete-var.js	965 B	-rw-r--r--	2019-09-14 01:35
no-div-regex.js	1.42 KB	-rw-r--r--	2019-09-14 01:35
no-dupe-args.js	2.3 KB	-rw-r--r--	2019-09-14 01:35
no-dupe-class-members.js	3.58 KB	-rw-r--r--	2019-09-14 01:35
no-dupe-keys.js	3.87 KB	-rw-r--r--	2019-09-14 01:35
no-duplicate-case.js	1.36 KB	-rw-r--r--	2019-09-14 01:35
no-duplicate-imports.js	4.43 KB	-rw-r--r--	2019-09-14 01:35
no-else-return.js	15.74 KB	-rw-r--r--	2019-09-14 01:35
no-empty-character-class.js	1.91 KB	-rw-r--r--	2019-09-14 01:35
no-empty-function.js	4.61 KB	-rw-r--r--	2019-09-14 01:35
no-empty-pattern.js	1.15 KB	-rw-r--r--	2019-09-14 01:35
no-empty.js	2.44 KB	-rw-r--r--	2019-09-14 01:35
no-eq-null.js	1.21 KB	-rw-r--r--	2019-09-14 01:35
no-eval.js	9.31 KB	-rw-r--r--	2019-09-14 01:35
no-ex-assign.js	1.37 KB	-rw-r--r--	2019-09-14 01:35
no-extend-native.js	6.95 KB	-rw-r--r--	2019-09-14 01:35
no-extra-bind.js	5.71 KB	-rw-r--r--	2019-09-14 01:35
no-extra-boolean-cast.js	6.52 KB	-rw-r--r--	2019-09-14 01:35
no-extra-label.js	4.76 KB	-rw-r--r--	2019-09-14 01:35
no-extra-parens.js	39.11 KB	-rw-r--r--	2019-09-14 01:35
no-extra-semi.js	4.11 KB	-rw-r--r--	2019-09-14 01:35
no-fallthrough.js	4.78 KB	-rw-r--r--	2019-09-14 01:35
no-floating-decimal.js	2.33 KB	-rw-r--r--	2019-09-14 01:35
no-func-assign.js	1.96 KB	-rw-r--r--	2019-09-14 01:35
no-global-assign.js	2.76 KB	-rw-r--r--	2019-09-14 01:35
no-implicit-coercion.js	10.06 KB	-rw-r--r--	2019-09-14 01:35
no-implicit-globals.js	1.78 KB	-rw-r--r--	2019-09-14 01:35
no-implied-eval.js	5.99 KB	-rw-r--r--	2019-09-14 01:35
no-import-assign.js	6.92 KB	-rw-r--r--	2019-09-14 01:35
no-inline-comments.js	2.19 KB	-rw-r--r--	2019-09-14 01:35
no-inner-declarations.js	2.59 KB	-rw-r--r--	2019-09-14 01:35
no-invalid-regexp.js	4.01 KB	-rw-r--r--	2019-09-14 01:35
no-invalid-this.js	3.74 KB	-rw-r--r--	2019-09-14 01:35
no-irregular-whitespace.js	8.72 KB	-rw-r--r--	2019-09-14 01:35
no-iterator.js	1.08 KB	-rw-r--r--	2019-09-14 01:35
no-label-var.js	2.13 KB	-rw-r--r--	2019-09-14 01:35
no-labels.js	4.22 KB	-rw-r--r--	2019-09-14 01:35
no-lone-blocks.js	3.68 KB	-rw-r--r--	2019-09-14 01:35
no-lonely-if.js	3.62 KB	-rw-r--r--	2019-09-14 01:35
no-loop-func.js	6.16 KB	-rw-r--r--	2019-09-14 01:35
no-magic-numbers.js	5.8 KB	-rw-r--r--	2019-09-14 01:35
no-misleading-character-class.js	6.05 KB	-rw-r--r--	2019-09-14 01:35
no-mixed-operators.js	8.21 KB	-rw-r--r--	2019-09-14 01:35
no-mixed-requires.js	6.91 KB	-rw-r--r--	2019-09-14 01:35
no-mixed-spaces-and-tabs.js	4.54 KB	-rw-r--r--	2019-09-14 01:35
no-multi-assign.js	1.18 KB	-rw-r--r--	2019-09-14 01:35
no-multi-spaces.js	4.85 KB	-rw-r--r--	2019-09-14 01:35
no-multi-str.js	1.64 KB	-rw-r--r--	2019-09-14 01:35
no-multiple-empty-lines.js	5.75 KB	-rw-r--r--	2019-09-14 01:35
no-native-reassign.js	2.86 KB	-rw-r--r--	2019-09-14 01:35
no-negated-condition.js	2.68 KB	-rw-r--r--	2019-09-14 01:35
no-negated-in-lhs.js	1.08 KB	-rw-r--r--	2019-09-14 01:35
no-nested-ternary.js	986 B	-rw-r--r--	2019-09-14 01:35
no-new-func.js	1.24 KB	-rw-r--r--	2019-09-14 01:35
no-new-object.js	923 B	-rw-r--r--	2019-09-14 01:35
no-new-require.js	960 B	-rw-r--r--	2019-09-14 01:35
no-new-symbol.js	1.27 KB	-rw-r--r--	2019-09-14 01:35
no-new-wrappers.js	1.05 KB	-rw-r--r--	2019-09-14 01:35
no-new.js	913 B	-rw-r--r--	2019-09-14 01:35
no-obj-calls.js	1.84 KB	-rw-r--r--	2019-09-14 01:35
no-octal-escape.js	1.42 KB	-rw-r--r--	2019-09-14 01:35
no-octal.js	886 B	-rw-r--r--	2019-09-14 01:35
no-param-reassign.js	6.8 KB	-rw-r--r--	2019-09-14 01:35
no-path-concat.js	1.44 KB	-rw-r--r--	2019-09-14 01:35
no-plusplus.js	1.66 KB	-rw-r--r--	2019-09-14 01:35
no-process-env.js	1.01 KB	-rw-r--r--	2019-09-14 01:35
no-process-exit.js	1.08 KB	-rw-r--r--	2019-09-14 01:35
no-proto.js	1.07 KB	-rw-r--r--	2019-09-14 01:35
no-prototype-builtins.js	1.63 KB	-rw-r--r--	2019-09-14 01:35
no-redeclare.js	5.6 KB	-rw-r--r--	2019-09-14 01:35
no-regex-spaces.js	3.73 KB	-rw-r--r--	2019-09-14 01:35
no-restricted-globals.js	3.76 KB	-rw-r--r--	2019-09-14 01:35
no-restricted-imports.js	11.43 KB	-rw-r--r--	2023-12-15 20:21
no-restricted-modules.js	5.9 KB	-rw-r--r--	2023-12-15 20:21
no-restricted-properties.js	6.46 KB	-rw-r--r--	2019-09-14 01:35
no-restricted-syntax.js	1.97 KB	-rw-r--r--	2019-09-14 01:35
no-return-assign.js	2.49 KB	-rw-r--r--	2019-09-14 01:35
no-return-await.js	3.73 KB	-rw-r--r--	2019-09-14 01:35
no-script-url.js	1.05 KB	-rw-r--r--	2019-09-14 01:35
no-self-assign.js	6.79 KB	-rw-r--r--	2019-09-14 01:35
no-self-compare.js	1.72 KB	-rw-r--r--	2019-09-14 01:35
no-sequences.js	3.94 KB	-rw-r--r--	2019-09-14 01:35
no-shadow-restricted-names.js	2 KB	-rw-r--r--	2019-09-14 01:35
no-shadow.js	6.81 KB	-rw-r--r--	2019-09-14 01:35
no-spaced-func.js	2.34 KB	-rw-r--r--	2019-09-14 01:35
no-sparse-arrays.js	1.07 KB	-rw-r--r--	2019-09-14 01:35
no-sync.js	1.52 KB	-rw-r--r--	2019-09-14 01:35
no-tabs.js	2.01 KB	-rw-r--r--	2019-09-14 01:35
no-template-curly-in-string.js	1.04 KB	-rw-r--r--	2019-09-14 01:35
no-ternary.js	793 B	-rw-r--r--	2019-09-14 01:35
no-this-before-super.js	9.95 KB	-rw-r--r--	2019-09-14 01:35
no-throw-literal.js	1.26 KB	-rw-r--r--	2019-09-14 01:35
no-trailing-spaces.js	6.13 KB	-rw-r--r--	2019-09-14 01:35
no-undef-init.js	2.01 KB	-rw-r--r--	2019-09-14 01:35
no-undef.js	2.24 KB	-rw-r--r--	2019-09-14 01:35
no-undefined.js	2.07 KB	-rw-r--r--	2019-09-14 01:35
no-underscore-dangle.js	7.44 KB	-rw-r--r--	2019-09-14 01:35
no-unexpected-multiline.js	3.59 KB	-rw-r--r--	2019-09-14 01:35
no-unmodified-loop-condition.js	11.65 KB	-rw-r--r--	2019-09-14 01:35
no-unneeded-ternary.js	6.58 KB	-rw-r--r--	2019-09-14 01:35
no-unreachable.js	6.29 KB	-rw-r--r--	2019-09-14 01:35
no-unsafe-finally.js	3.87 KB	-rw-r--r--	2019-09-14 01:35
no-unsafe-negation.js	2.36 KB	-rw-r--r--	2019-09-14 01:35
no-unused-expressions.js	4.7 KB	-rw-r--r--	2019-09-14 01:35
no-unused-labels.js	3.22 KB	-rw-r--r--	2019-09-14 01:35
no-unused-vars.js	23.08 KB	-rw-r--r--	2019-09-14 01:35
no-use-before-define.js	7.45 KB	-rw-r--r--	2019-09-14 01:35
no-useless-call.js	2.78 KB	-rw-r--r--	2019-09-14 01:35
no-useless-catch.js	1.55 KB	-rw-r--r--	2019-09-14 01:35
no-useless-computed-key.js	3.19 KB	-rw-r--r--	2019-09-14 01:35
no-useless-concat.js	3.16 KB	-rw-r--r--	2019-09-14 01:35
no-useless-constructor.js	5.46 KB	-rw-r--r--	2019-09-14 01:35
no-useless-escape.js	8.98 KB	-rw-r--r--	2019-09-14 01:35
no-useless-rename.js	5.08 KB	-rw-r--r--	2019-09-14 01:35
no-useless-return.js	11.77 KB	-rw-r--r--	2019-09-14 01:35
no-var.js	12.13 KB	-rw-r--r--	2019-09-14 01:35
no-void.js	1.03 KB	-rw-r--r--	2019-09-14 01:35
no-warning-comments.js	5.4 KB	-rw-r--r--	2019-09-14 01:35
no-whitespace-before-property.js	3.33 KB	-rw-r--r--	2019-09-14 01:35
no-with.js	784 B	-rw-r--r--	2019-09-14 01:35
nonblock-statement-body-position.js	4.41 KB	-rw-r--r--	2023-12-15 20:21
object-curly-newline.js	10.69 KB	-rw-r--r--	2019-09-14 01:35
object-curly-spacing.js	11.27 KB	-rw-r--r--	2019-09-14 01:35
object-property-newline.js	3.59 KB	-rw-r--r--	2019-09-14 01:35
object-shorthand.js	20.66 KB	-rw-r--r--	2019-09-14 01:35
one-var-declaration-per-line.js	2.74 KB	-rw-r--r--	2019-09-14 01:35
one-var.js	21 KB	-rw-r--r--	2019-09-14 01:35
operator-assignment.js	7.73 KB	-rw-r--r--	2019-09-14 01:35
operator-linebreak.js	10.01 KB	-rw-r--r--	2019-09-14 01:35
padded-blocks.js	10.05 KB	-rw-r--r--	2019-09-14 01:35
padding-line-between-statements.js	20 KB	-rw-r--r--	2023-12-15 20:21
prefer-arrow-callback.js	11.17 KB	-rw-r--r--	2019-09-14 01:35
prefer-const.js	16.69 KB	-rw-r--r--	2019-09-14 01:35
prefer-destructuring.js	9.7 KB	-rw-r--r--	2019-09-14 01:35
prefer-named-capture-group.js	3.94 KB	-rw-r--r--	2019-09-14 01:35
prefer-numeric-literals.js	3.73 KB	-rw-r--r--	2019-09-14 01:35
prefer-object-spread.js	9.05 KB	-rw-r--r--	2019-09-14 01:35
prefer-promise-reject-errors.js	5.41 KB	-rw-r--r--	2019-09-14 01:35
prefer-reflect.js	4.5 KB	-rw-r--r--	2019-09-14 01:35
prefer-regex-literals.js	4.4 KB	-rw-r--r--	2019-09-14 01:35
prefer-rest-params.js	3.22 KB	-rw-r--r--	2019-09-14 01:35
prefer-spread.js	2.77 KB	-rw-r--r--	2019-09-14 01:35
prefer-template.js	11.18 KB	-rw-r--r--	2019-09-14 01:35
quote-props.js	11.41 KB	-rw-r--r--	2019-09-14 01:35
quotes.js	11.48 KB	-rw-r--r--	2019-09-14 01:35
radix.js	5.16 KB	-rw-r--r--	2019-09-14 01:35
require-atomic-updates.js	9.51 KB	-rw-r--r--	2019-09-14 01:35
require-await.js	3.04 KB	-rw-r--r--	2019-09-14 01:35
require-jsdoc.js	3.65 KB	-rw-r--r--	2019-09-14 01:35
require-unicode-regexp.js	1.94 KB	-rw-r--r--	2019-09-14 01:35
require-yield.js	2.01 KB	-rw-r--r--	2019-09-14 01:35
rest-spread-spacing.js	3.93 KB	-rw-r--r--	2019-09-14 01:35
semi-spacing.js	7.62 KB	-rw-r--r--	2019-09-14 01:35
semi-style.js	4.98 KB	-rw-r--r--	2019-09-14 01:35
semi.js	11.56 KB	-rw-r--r--	2019-09-14 01:35
sort-imports.js	9.08 KB	-rw-r--r--	2019-09-14 01:35
sort-keys.js	7.64 KB	-rw-r--r--	2023-12-15 20:21
sort-vars.js	3.97 KB	-rw-r--r--	2019-09-14 01:35
space-before-blocks.js	5.59 KB	-rw-r--r--	2019-09-14 01:35
space-before-function-paren.js	5.56 KB	-rw-r--r--	2019-09-14 01:35
space-in-parens.js	10.41 KB	-rw-r--r--	2019-09-14 01:35
space-infix-ops.js	5.35 KB	-rw-r--r--	2019-09-14 01:35
space-unary-ops.js	12.3 KB	-rw-r--r--	2019-09-14 01:35
spaced-comment.js	12.27 KB	-rw-r--r--	2019-09-14 01:35
strict.js	10.31 KB	-rw-r--r--	2019-09-14 01:35
switch-colon-spacing.js	5.2 KB	-rw-r--r--	2019-09-14 01:35
symbol-description.js	1.98 KB	-rw-r--r--	2019-09-14 01:35
template-curly-spacing.js	4.06 KB	-rw-r--r--	2019-09-14 01:35
template-tag-spacing.js	2.79 KB	-rw-r--r--	2019-09-14 01:35
unicode-bom.js	2.15 KB	-rw-r--r--	2019-09-14 01:35
use-isnan.js	1.01 KB	-rw-r--r--	2019-09-14 01:35
valid-jsdoc.js	20.04 KB	-rw-r--r--	2019-09-14 01:35
valid-typeof.js	2.97 KB	-rw-r--r--	2019-09-14 01:35
vars-on-top.js	4.94 KB	-rw-r--r--	2019-09-14 01:35
wrap-iife.js	5.91 KB	-rw-r--r--	2019-09-14 01:35
wrap-regex.js	1.86 KB	-rw-r--r--	2019-09-14 01:35
yield-star-spacing.js	4.22 KB	-rw-r--r--	2019-09-14 01:35
yoda.js	11.41 KB	-rw-r--r--	2019-09-14 01:35

Rename

/**
 * @fileoverview Rule to forbid or enforce dangling commas.
 * @author Ian Christian Myers
 */

"use strict";

//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------

const lodash = require("lodash");
const astUtils = require("./utils/ast-utils");

//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------

const DEFAULT_OPTIONS = Object.freeze({
    arrays: "never",
    objects: "never",
    imports: "never",
    exports: "never",
    functions: "never"
});

/**
 * Checks whether or not a trailing comma is allowed in a given node.
 * If the `lastItem` is `RestElement` or `RestProperty`, it disallows trailing commas.
 *
 * @param {ASTNode} lastItem - The node of the last element in the given node.
 * @returns {boolean} `true` if a trailing comma is allowed.
 */
function isTrailingCommaAllowed(lastItem) {
    return !(
        lastItem.type === "RestElement" ||
        lastItem.type === "RestProperty" ||
        lastItem.type === "ExperimentalRestProperty"
    );
}

/**
 * Normalize option value.
 *
 * @param {string|Object|undefined} optionValue - The 1st option value to normalize.
 * @returns {Object} The normalized option value.
 */
function normalizeOptions(optionValue) {
    if (typeof optionValue === "string") {
        return {
            arrays: optionValue,
            objects: optionValue,
            imports: optionValue,
            exports: optionValue,

// For backward compatibility, always ignore functions.
            functions: "ignore"
        };
    }
    if (typeof optionValue === "object" && optionValue !== null) {
        return {
            arrays: optionValue.arrays || DEFAULT_OPTIONS.arrays,
            objects: optionValue.objects || DEFAULT_OPTIONS.objects,
            imports: optionValue.imports || DEFAULT_OPTIONS.imports,
            exports: optionValue.exports || DEFAULT_OPTIONS.exports,
            functions: optionValue.functions || DEFAULT_OPTIONS.functions
        };
    }

return DEFAULT_OPTIONS;
}

//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------

module.exports = {
    meta: {
        type: "layout",

docs: {
            description: "require or disallow trailing commas",
            category: "Stylistic Issues",
            recommended: false,
            url: "https://eslint.org/docs/rules/comma-dangle"
        },

fixable: "code",

schema: {
            definitions: {
                value: {
                    enum: [
                        "always-multiline",
                        "always",
                        "never",
                        "only-multiline"
                    ]
                },
                valueWithIgnore: {
                    enum: [
                        "always-multiline",
                        "always",
                        "ignore",
                        "never",
                        "only-multiline"
                    ]
                }
            },
            type: "array",
            items: [
                {
                    oneOf: [
                        {
                            $ref: "#/definitions/value"
                        },
                        {
                            type: "object",
                            properties: {
                                arrays: { $ref: "#/definitions/valueWithIgnore" },
                                objects: { $ref: "#/definitions/valueWithIgnore" },
                                imports: { $ref: "#/definitions/valueWithIgnore" },
                                exports: { $ref: "#/definitions/valueWithIgnore" },
                                functions: { $ref: "#/definitions/valueWithIgnore" }
                            },
                            additionalProperties: false
                        }
                    ]
                }
            ]
        },

messages: {
            unexpected: "Unexpected trailing comma.",
            missing: "Missing trailing comma."
        }
    },

create(context) {
        const options = normalizeOptions(context.options[0]);
        const sourceCode = context.getSourceCode();

/**
         * Gets the last item of the given node.
         * @param {ASTNode} node - The node to get.
         * @returns {ASTNode|null} The last node or null.
         */
        function getLastItem(node) {
            switch (node.type) {
                case "ObjectExpression":
                case "ObjectPattern":
                    return lodash.last(node.properties);
                case "ArrayExpression":
                case "ArrayPattern":
                    return lodash.last(node.elements);
                case "ImportDeclaration":
                case "ExportNamedDeclaration":
                    return lodash.last(node.specifiers);
                case "FunctionDeclaration":
                case "FunctionExpression":
                case "ArrowFunctionExpression":
                    return lodash.last(node.params);
                case "CallExpression":
                case "NewExpression":
                    return lodash.last(node.arguments);
                default:
                    return null;
            }
        }

/**
         * Gets the trailing comma token of the given node.
         * If the trailing comma does not exist, this returns the token which is
         * the insertion point of the trailing comma token.
         *
         * @param {ASTNode} node - The node to get.
         * @param {ASTNode} lastItem - The last item of the node.
         * @returns {Token} The trailing comma token or the insertion point.
         */
        function getTrailingToken(node, lastItem) {
            switch (node.type) {
                case "ObjectExpression":
                case "ArrayExpression":
                case "CallExpression":
                case "NewExpression":
                    return sourceCode.getLastToken(node, 1);
                default: {
                    const nextToken = sourceCode.getTokenAfter(lastItem);

if (astUtils.isCommaToken(nextToken)) {
                        return nextToken;
                    }
                    return sourceCode.getLastToken(lastItem);
                }
            }
        }

/**
         * Checks whether or not a given node is multiline.
         * This rule handles a given node as multiline when the closing parenthesis
         * and the last element are not on the same line.
         *
         * @param {ASTNode} node - A node to check.
         * @returns {boolean} `true` if the node is multiline.
         */
        function isMultiline(node) {
            const lastItem = getLastItem(node);

if (!lastItem) {
                return false;
            }

const penultimateToken = getTrailingToken(node, lastItem);
            const lastToken = sourceCode.getTokenAfter(penultimateToken);

return lastToken.loc.end.line !== penultimateToken.loc.end.line;
        }

/**
         * Reports a trailing comma if it exists.
         *
         * @param {ASTNode} node - A node to check. Its type is one of
         *   ObjectExpression, ObjectPattern, ArrayExpression, ArrayPattern,
         *   ImportDeclaration, and ExportNamedDeclaration.
         * @returns {void}
         */
        function forbidTrailingComma(node) {
            const lastItem = getLastItem(node);

if (!lastItem || (node.type === "ImportDeclaration" && lastItem.type !== "ImportSpecifier")) {
                return;
            }

const trailingToken = getTrailingToken(node, lastItem);

if (astUtils.isCommaToken(trailingToken)) {
                context.report({
                    node: lastItem,
                    loc: trailingToken.loc.start,
                    messageId: "unexpected",
                    fix(fixer) {
                        return fixer.remove(trailingToken);
                    }
                });
            }
        }

/**
         * Reports the last element of a given node if it does not have a trailing
         * comma.
         *
         * If a given node is `ArrayPattern` which has `RestElement`, the trailing
         * comma is disallowed, so report if it exists.
         *
         * @param {ASTNode} node - A node to check. Its type is one of
         *   ObjectExpression, ObjectPattern, ArrayExpression, ArrayPattern,
         *   ImportDeclaration, and ExportNamedDeclaration.
         * @returns {void}
         */
        function forceTrailingComma(node) {
            const lastItem = getLastItem(node);

if (!lastItem || (node.type === "ImportDeclaration" && lastItem.type !== "ImportSpecifier")) {
                return;
            }
            if (!isTrailingCommaAllowed(lastItem)) {
                forbidTrailingComma(node);
                return;
            }

const trailingToken = getTrailingToken(node, lastItem);

if (trailingToken.value !== ",") {
                context.report({
                    node: lastItem,
                    loc: trailingToken.loc.end,
                    messageId: "missing",
                    fix(fixer) {
                        return fixer.insertTextAfter(trailingToken, ",");
                    }
                });
            }
        }

/**
         * If a given node is multiline, reports the last element of a given node
         * when it does not have a trailing comma.
         * Otherwise, reports a trailing comma if it exists.
         *
         * @param {ASTNode} node - A node to check. Its type is one of
         *   ObjectExpression, ObjectPattern, ArrayExpression, ArrayPattern,
         *   ImportDeclaration, and ExportNamedDeclaration.
         * @returns {void}
         */
        function forceTrailingCommaIfMultiline(node) {
            if (isMultiline(node)) {
                forceTrailingComma(node);
            } else {
                forbidTrailingComma(node);
            }
        }

/**
         * Only if a given node is not multiline, reports the last element of a given node
         * when it does not have a trailing comma.
         * Otherwise, reports a trailing comma if it exists.
         *
         * @param {ASTNode} node - A node to check. Its type is one of
         *   ObjectExpression, ObjectPattern, ArrayExpression, ArrayPattern,
         *   ImportDeclaration, and ExportNamedDeclaration.
         * @returns {void}
         */
        function allowTrailingCommaIfMultiline(node) {
            if (!isMultiline(node)) {
                forbidTrailingComma(node);
            }
        }

const predicate = {
            always: forceTrailingComma,
            "always-multiline": forceTrailingCommaIfMultiline,
            "only-multiline": allowTrailingCommaIfMultiline,
            never: forbidTrailingComma,
            ignore: lodash.noop
        };

return {
            ObjectExpression: predicate[options.objects],
            ObjectPattern: predicate[options.objects],

ArrayExpression: predicate[options.arrays],
            ArrayPattern: predicate[options.arrays],

ImportDeclaration: predicate[options.imports],

ExportNamedDeclaration: predicate[options.exports],

FunctionDeclaration: predicate[options.functions],
            FunctionExpression: predicate[options.functions],
            ArrowFunctionExpression: predicate[options.functions],
            CallExpression: predicate[options.functions],
            NewExpression: predicate[options.functions]
        };
    }
};