Showing 220 of 225 total issues
This overload and the one on line 185 can be combined into one signature taking number | string
. Open
export function downwardFiles(startDirectory: string): AsyncIterable<string>;
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Rule: unified-signatures
Warns for any two overloads that could be unified into one by using a union or an optional/rest parameter.
Notes
- TypeScript Only
Config
Not configurable.
Examples
"unified-signatures": true
For more information see this page.
" should be ' Open
import { isDirectory, isDirectorySync } from "./stat.js";
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- Exclude checks
Rule: quotemark
Enforces quote character for string literals.
Notes
- Has Fix
Config
Five arguments may be optionally provided:
-
"single"
enforces single quotes. -
"double"
enforces double quotes. -
"backtick"
enforces backticks. -
"jsx-single"
enforces single quotes for JSX attributes. -
"jsx-double"
enforces double quotes for JSX attributes. -
"avoid-template"
forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if"avoid-escape"
is enabled and both single and double quotes are present in the string (the latter option takes precedence). -
"avoid-escape"
allows you to use the "other" quotemark in cases where escaping would normally be required. For example,[true, "double", "avoid-escape"]
would not report a failure on the string literal'Hello "World"'
.
Examples
"quotemark": true,single,avoid-escape,avoid-template
"quotemark": true,single,jsx-double
Schema
{
"type": "array",
"items": {
"type": "string",
"enum": [
"single",
"double",
"backtick",
"jsx-single",
"jsx-double",
"avoid-escape",
"avoid-template"
]
},
"minLength": 0,
"maxLength": 5
}
For more information see this page.
Shadowed name: 'filter' Open
for (const filter of filters) {
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Rule: no-shadowed-variable
Disallows shadowing variable declarations.
Rationale
When a variable in a local scope and a variable in the containing scope have the same name, shadowing occurs. Shadowing makes it impossible to access the variable in the containing scope and obscures to what value an identifier actually refers. Compare the following snippets:
const a = 'no shadow';
function print() {
console.log(a);
}
print(); // logs 'no shadow'.
const a = 'no shadow';
function print() {
const a = 'shadow'; // TSLint will complain here.
console.log(a);
}
print(); // logs 'shadow'.
ESLint has an equivalent rule. For more background information, refer to this MDN closure doc.
Config
You can optionally pass an object to disable checking for certain kinds of declarations.
Possible keys are "class"
, "enum"
, "function"
, "import"
, "interface"
, "namespace"
, "typeAlias"
and "typeParameter"
. You can also pass "underscore
" to ignore variable names that begin with _
.
Just set the value to false
for the check you want to disable.
All checks default to true
, i.e. are enabled by default.
Note that you cannot disable variables and parameters.
The option "temporalDeadZone"
defaults to true
which shows errors when shadowing block scoped declarations in their
temporal dead zone. When set to false
parameters, classes, enums and variables declared
with let
or const
are not considered shadowed if the shadowing occurs within their
temporal dead zone.
The following example shows how the "temporalDeadZone"
option changes the linting result:
function fn(value) {
if (value) {
const tmp = value; // no error on this line if "temporalDeadZone" is false
return tmp;
}
let tmp = undefined;
if (!value) {
const tmp = value; // this line always contains an error
return tmp;
}
}
Examples
"no-shadowed-variable": true
"no-shadowed-variable": true,[object Object]
Schema
{
"type": "object",
"properties": {
"class": {
"type": "boolean"
},
"enum": {
"type": "boolean"
},
"function": {
"type": "boolean"
},
"import": {
"type": "boolean"
},
"interface": {
"type": "boolean"
},
"namespace": {
"type": "boolean"
},
"typeAlias": {
"type": "boolean"
},
"typeParameter": {
"type": "boolean"
},
"temporalDeadZone": {
"type": "boolean"
},
"underscore": {
"type": "boolean"
}
}
}
For more information see this page.
" should be ' Open
const specialCharacters = [".", sep];
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- Exclude checks
Rule: quotemark
Enforces quote character for string literals.
Notes
- Has Fix
Config
Five arguments may be optionally provided:
-
"single"
enforces single quotes. -
"double"
enforces double quotes. -
"backtick"
enforces backticks. -
"jsx-single"
enforces single quotes for JSX attributes. -
"jsx-double"
enforces double quotes for JSX attributes. -
"avoid-template"
forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if"avoid-escape"
is enabled and both single and double quotes are present in the string (the latter option takes precedence). -
"avoid-escape"
allows you to use the "other" quotemark in cases where escaping would normally be required. For example,[true, "double", "avoid-escape"]
would not report a failure on the string literal'Hello "World"'
.
Examples
"quotemark": true,single,avoid-escape,avoid-template
"quotemark": true,single,jsx-double
Schema
{
"type": "array",
"items": {
"type": "string",
"enum": [
"single",
"double",
"backtick",
"jsx-single",
"jsx-double",
"avoid-escape",
"avoid-template"
]
},
"minLength": 0,
"maxLength": 5
}
For more information see this page.
" should be ' Open
} from "./files.js";
- Read upRead up
- Exclude checks
Rule: quotemark
Enforces quote character for string literals.
Notes
- Has Fix
Config
Five arguments may be optionally provided:
-
"single"
enforces single quotes. -
"double"
enforces double quotes. -
"backtick"
enforces backticks. -
"jsx-single"
enforces single quotes for JSX attributes. -
"jsx-double"
enforces double quotes for JSX attributes. -
"avoid-template"
forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if"avoid-escape"
is enabled and both single and double quotes are present in the string (the latter option takes precedence). -
"avoid-escape"
allows you to use the "other" quotemark in cases where escaping would normally be required. For example,[true, "double", "avoid-escape"]
would not report a failure on the string literal'Hello "World"'
.
Examples
"quotemark": true,single,avoid-escape,avoid-template
"quotemark": true,single,jsx-double
Schema
{
"type": "array",
"items": {
"type": "string",
"enum": [
"single",
"double",
"backtick",
"jsx-single",
"jsx-double",
"avoid-escape",
"avoid-template"
]
},
"minLength": 0,
"maxLength": 5
}
For more information see this page.
" should be ' Open
import { isDirectory, isDirectorySync } from "./stat.js";
- Read upRead up
- Exclude checks
Rule: quotemark
Enforces quote character for string literals.
Notes
- Has Fix
Config
Five arguments may be optionally provided:
-
"single"
enforces single quotes. -
"double"
enforces double quotes. -
"backtick"
enforces backticks. -
"jsx-single"
enforces single quotes for JSX attributes. -
"jsx-double"
enforces double quotes for JSX attributes. -
"avoid-template"
forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if"avoid-escape"
is enabled and both single and double quotes are present in the string (the latter option takes precedence). -
"avoid-escape"
allows you to use the "other" quotemark in cases where escaping would normally be required. For example,[true, "double", "avoid-escape"]
would not report a failure on the string literal'Hello "World"'
.
Examples
"quotemark": true,single,avoid-escape,avoid-template
"quotemark": true,single,jsx-double
Schema
{
"type": "array",
"items": {
"type": "string",
"enum": [
"single",
"double",
"backtick",
"jsx-single",
"jsx-double",
"avoid-escape",
"avoid-template"
]
},
"minLength": 0,
"maxLength": 5
}
For more information see this page.
" should be ' Open
startPath = ".",
- Read upRead up
- Exclude checks
Rule: quotemark
Enforces quote character for string literals.
Notes
- Has Fix
Config
Five arguments may be optionally provided:
-
"single"
enforces single quotes. -
"double"
enforces double quotes. -
"backtick"
enforces backticks. -
"jsx-single"
enforces single quotes for JSX attributes. -
"jsx-double"
enforces double quotes for JSX attributes. -
"avoid-template"
forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if"avoid-escape"
is enabled and both single and double quotes are present in the string (the latter option takes precedence). -
"avoid-escape"
allows you to use the "other" quotemark in cases where escaping would normally be required. For example,[true, "double", "avoid-escape"]
would not report a failure on the string literal'Hello "World"'
.
Examples
"quotemark": true,single,avoid-escape,avoid-template
"quotemark": true,single,jsx-double
Schema
{
"type": "array",
"items": {
"type": "string",
"enum": [
"single",
"double",
"backtick",
"jsx-single",
"jsx-double",
"avoid-escape",
"avoid-template"
]
},
"minLength": 0,
"maxLength": 5
}
For more information see this page.
" should be ' Open
} else if (typeof directories === "function") {
- Read upRead up
- Exclude checks
Rule: quotemark
Enforces quote character for string literals.
Notes
- Has Fix
Config
Five arguments may be optionally provided:
-
"single"
enforces single quotes. -
"double"
enforces double quotes. -
"backtick"
enforces backticks. -
"jsx-single"
enforces single quotes for JSX attributes. -
"jsx-double"
enforces double quotes for JSX attributes. -
"avoid-template"
forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if"avoid-escape"
is enabled and both single and double quotes are present in the string (the latter option takes precedence). -
"avoid-escape"
allows you to use the "other" quotemark in cases where escaping would normally be required. For example,[true, "double", "avoid-escape"]
would not report a failure on the string literal'Hello "World"'
.
Examples
"quotemark": true,single,avoid-escape,avoid-template
"quotemark": true,single,jsx-double
Schema
{
"type": "array",
"items": {
"type": "string",
"enum": [
"single",
"double",
"backtick",
"jsx-single",
"jsx-double",
"avoid-escape",
"avoid-template"
]
},
"minLength": 0,
"maxLength": 5
}
For more information see this page.
This overload and the one on line 527 can be combined into one signature taking number | string
. Open
endDirectory: string,
- Read upRead up
- Exclude checks
Rule: unified-signatures
Warns for any two overloads that could be unified into one by using a union or an optional/rest parameter.
Notes
- TypeScript Only
Config
Not configurable.
Examples
"unified-signatures": true
For more information see this page.
Shadowed name: 'filter' Open
for (const filter of filters) {
- Read upRead up
- Exclude checks
Rule: no-shadowed-variable
Disallows shadowing variable declarations.
Rationale
When a variable in a local scope and a variable in the containing scope have the same name, shadowing occurs. Shadowing makes it impossible to access the variable in the containing scope and obscures to what value an identifier actually refers. Compare the following snippets:
const a = 'no shadow';
function print() {
console.log(a);
}
print(); // logs 'no shadow'.
const a = 'no shadow';
function print() {
const a = 'shadow'; // TSLint will complain here.
console.log(a);
}
print(); // logs 'shadow'.
ESLint has an equivalent rule. For more background information, refer to this MDN closure doc.
Config
You can optionally pass an object to disable checking for certain kinds of declarations.
Possible keys are "class"
, "enum"
, "function"
, "import"
, "interface"
, "namespace"
, "typeAlias"
and "typeParameter"
. You can also pass "underscore
" to ignore variable names that begin with _
.
Just set the value to false
for the check you want to disable.
All checks default to true
, i.e. are enabled by default.
Note that you cannot disable variables and parameters.
The option "temporalDeadZone"
defaults to true
which shows errors when shadowing block scoped declarations in their
temporal dead zone. When set to false
parameters, classes, enums and variables declared
with let
or const
are not considered shadowed if the shadowing occurs within their
temporal dead zone.
The following example shows how the "temporalDeadZone"
option changes the linting result:
function fn(value) {
if (value) {
const tmp = value; // no error on this line if "temporalDeadZone" is false
return tmp;
}
let tmp = undefined;
if (!value) {
const tmp = value; // this line always contains an error
return tmp;
}
}
Examples
"no-shadowed-variable": true
"no-shadowed-variable": true,[object Object]
Schema
{
"type": "object",
"properties": {
"class": {
"type": "boolean"
},
"enum": {
"type": "boolean"
},
"function": {
"type": "boolean"
},
"import": {
"type": "boolean"
},
"interface": {
"type": "boolean"
},
"namespace": {
"type": "boolean"
},
"typeAlias": {
"type": "boolean"
},
"typeParameter": {
"type": "boolean"
},
"temporalDeadZone": {
"type": "boolean"
},
"underscore": {
"type": "boolean"
}
}
}
For more information see this page.
" should be ' Open
export { isFile, isDirectory, isFileSync, isDirectorySync } from "./stat.js";
- Read upRead up
- Exclude checks
Rule: quotemark
Enforces quote character for string literals.
Notes
- Has Fix
Config
Five arguments may be optionally provided:
-
"single"
enforces single quotes. -
"double"
enforces double quotes. -
"backtick"
enforces backticks. -
"jsx-single"
enforces single quotes for JSX attributes. -
"jsx-double"
enforces double quotes for JSX attributes. -
"avoid-template"
forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if"avoid-escape"
is enabled and both single and double quotes are present in the string (the latter option takes precedence). -
"avoid-escape"
allows you to use the "other" quotemark in cases where escaping would normally be required. For example,[true, "double", "avoid-escape"]
would not report a failure on the string literal'Hello "World"'
.
Examples
"quotemark": true,single,avoid-escape,avoid-template
"quotemark": true,single,jsx-double
Schema
{
"type": "array",
"items": {
"type": "string",
"enum": [
"single",
"double",
"backtick",
"jsx-single",
"jsx-double",
"avoid-escape",
"avoid-template"
]
},
"minLength": 0,
"maxLength": 5
}
For more information see this page.
Unexpected tabs found. Open
See: https://chevrotain.io/docs/guide/resolving_lexer_errors.html#REGEXP_PARSING for details.`),(0,bs.PRINT_ERROR)(Bn.failedOptimizationPrefixMsg+`
- Exclude checks
Unexpected tabs found. Open
For details See: https://chevrotain.io/docs/guide/resolving_lexer_errors.html#MISSING_LINE_TERM_CHARS`);if(r.safeMode&&r.ensureOptimizations)throw Error('"safeMode" and "ensureOptimizations" flags are mutually exclusive.');i.trackStartLines=/full|onlyStart/i.test(i.config.positionTracking),i.trackEndLines=/full/i.test(i.config.positionTracking),(0,lr.isArray)(e)?(s={modes:{}},s.modes[so.DEFAULT_MODE]=(0,lr.cloneArr)(e),s[so.DEFAULT_MODE]=so.DEFAULT_MODE):(o=!1,s=(0,lr.cloneObj)(e))}),i.config.skipValidations===!1&&(i.TRACE_INIT("performRuntimeChecks",function(){i.lexerDefinitionErrors=i.lexerDefinitionErrors.concat((0,so.performRuntimeChecks)(s,i.trackStartLines,i.config.lineTerminatorCharacters))}),i.TRACE_INIT("performWarningRuntimeChecks",function(){i.lexerDefinitionWarning=i.lexerDefinitionWarning.concat((0,so.performWarningRuntimeChecks)(s,i.trackStartLines,i.config.lineTerminatorCharacters))})),s.modes=s.modes?s.modes:{},(0,lr.forEach)(s.modes,function(u,g){s.modes[g]=(0,lr.reject)(u,function(f){return(0,lr.isUndefined)(f)})});var a=(0,lr.keys)(s.modes);if((0,lr.forEach)(s.modes,function(u,g){i.TRACE_INIT("Mode: <"+g+"> processing",function(){if(i.modes.push(g),i.config.skipValidations===!1&&i.TRACE_INIT("validatePatterns",function(){i.lexerDefinitionErrors=i.lexerDefinitionErrors.concat((0,so.validatePatterns)(u,a))}),(0,lr.isEmpty)(i.lexerDefinitionErrors)){(0,wIe.augmentTokenTypes)(u);var f;i.TRACE_INIT("analyzeTokenTypes",function(){f=(0,so.analyzeTokenTypes)(u,{lineTerminatorCharacters:i.config.lineTerminatorCharacters,positionTracking:r.positionTracking,ensureOptimizations:r.ensureOptimizations,safeMode:r.safeMode,tracer:i.TRACE_INIT.bind(i)})}),i.patternIdxToConfig[g]=f.patternIdxToConfig,i.charCodeToPatternIdxToConfig[g]=f.charCodeToPatternIdxToConfig,i.emptyGroups=(0,lr.merge)(i.emptyGroups,f.emptyGroups),i.hasCustom=f.hasCustom||i.hasCustom,i.canModeBeOptimized[g]=f.canBeOptimized}})}),i.defaultMode=s.defaultMode,!(0,lr.isEmpty)(i.lexerDefinitionErrors)&&!i.config.deferDefinitionErrorsHandling){var l=(0,lr.map)(i.lexerDefinitionErrors,function(u){return u.message}),c=l.join(`-----------------------
- Exclude checks
Unexpected tabs found. Open
This error was thrown during the "grammar recording phase" For more info see:
- Exclude checks
Unexpected tabs found. Open
For further details.`);this.skipValidations=(0,an.has)(r,"skipValidations")?r.skipValidations:Er.DEFAULT_PARSER_CONFIG.skipValidations}return t.performSelfAnalysis=function(e){throw Error("The **static** `performSelfAnalysis` method has been deprecated. \nUse the **instance** method with the same name instead.")},t.prototype.performSelfAnalysis=function(){var e=this;this.TRACE_INIT("performSelfAnalysis",function(){var r;e.selfAnalysisDone=!0;var i=e.className;e.TRACE_INIT("toFastProps",function(){(0,an.toFastProperties)(e)}),e.TRACE_INIT("Grammar Recording",function(){try{e.enableRecording(),(0,an.forEach)(e.definedRulesNames,function(s){var o=e[s],a=o.originalGrammarAction,l=void 0;e.TRACE_INIT(s+" Rule",function(){l=e.topLevelRuleRecord(s,a)}),e.gastProductionsCache[s]=l})}finally{e.disableRecording()}});var n=[];if(e.TRACE_INIT("Grammar Resolving",function(){n=(0,pY.resolveGrammar)({rules:(0,an.values)(e.gastProductionsCache)}),e.definitionErrors=e.definitionErrors.concat(n)}),e.TRACE_INIT("Grammar Validations",function(){if((0,an.isEmpty)(n)&&e.skipValidations===!1){var s=(0,pY.validateGrammar)({rules:(0,an.values)(e.gastProductionsCache),maxLookahead:e.maxLookahead,tokenTypes:(0,an.values)(e.tokensMap),errMsgProvider:hY.defaultGrammarValidatorErrorProvider,grammarName:i});e.definitionErrors=e.definitionErrors.concat(s)}}),(0,an.isEmpty)(e.definitionErrors)&&(e.recoveryEnabled&&e.TRACE_INIT("computeAllProdsFollows",function(){var s=(0,Iwe.computeAllProdsFollows)((0,an.values)(e.gastProductionsCache));e.resyncFollows=s}),e.TRACE_INIT("ComputeLookaheadFunctions",function(){e.preComputeLookaheadFunctions((0,an.values)(e.gastProductionsCache))})),!t.DEFER_DEFINITION_ERRORS_HANDLING&&!(0,an.isEmpty)(e.definitionErrors))throw r=(0,an.map)(e.definitionErrors,function(s){return s.message}),new Error(`Parser Definition Errors detected:
- Exclude checks
Unexpected trailing spaces found. Open
<div id="diagrams" align="center"></div>
- Exclude checks
Unexpected tabs found. Open
For details See: https://chevrotain.io/docs/guide/resolving_lexer_errors.html#UNICODE_OPTIMIZE`);else{var W=(0,gg.getOptimizedStartCodesIndices)(x.PATTERN,e.ensureOptimizations);(0,Ne.isEmpty)(W)&&(y=!1),(0,Ne.forEach)(W,function(ee){Lv(S,ee,m[M])})}else e.ensureOptimizations&&(0,Ne.PRINT_ERROR)(""+gg.failedOptimizationPrefixMsg+(" TokenType: <"+x.name+`> is using a custom token pattern without providing <start_chars_hint> parameter.
- Exclude checks
Unexpected tabs found. Open
For details See: https://chevrotain.io/docs/guide/resolving_lexer_errors.html#CUSTOM_OPTIMIZE`),y=!1;return S},[])}),r("ArrayPacking",function(){Q=(0,Ne.packArray)(Q)}),{emptyGroups:p,patternIdxToConfig:m,charCodeToPatternIdxToConfig:Q,hasCustom:n,canBeOptimized:y}}Ze.analyzeTokenTypes=AIe;function cIe(t,e){var r=[],i=nj(t);r=r.concat(i.errors);var n=sj(i.valid),s=n.valid;return r=r.concat(n.errors),r=r.concat(lIe(s)),r=r.concat(oj(s)),r=r.concat(aj(s,e)),r=r.concat(Aj(s)),r}Ze.validatePatterns=cIe;function lIe(t){var e=[],r=(0,Ne.filter)(t,function(i){return(0,Ne.isRegExp)(i[Lo])});return e=e.concat(lj(r)),e=e.concat(uj(r)),e=e.concat(gj(r)),e=e.concat(fj(r)),e=e.concat(cj(r)),e}function nj(t){var e=(0,Ne.filter)(t,function(n){return!(0,Ne.has)(n,Lo)}),r=(0,Ne.map)(e,function(n){return{message:"Token Type: ->"+n.name+"<- missing static 'PATTERN' property",type:Ar.LexerDefinitionErrorType.MISSING_PATTERN,tokenTypes:[n]}}),i=(0,Ne.difference)(t,e);return{errors:r,valid:i}}Ze.findMissingPatterns=nj;function sj(t){var e=(0,Ne.filter)(t,function(n){var s=n[Lo];return!(0,Ne.isRegExp)(s)&&!(0,Ne.isFunction)(s)&&!(0,Ne.has)(s,"exec")&&!(0,Ne.isString)(s)}),r=(0,Ne.map)(e,function(n){return{message:"Token Type: ->"+n.name+"<- static 'PATTERN' can only be a RegExp, a Function matching the {CustomPatternMatcherFunc} type or an Object matching the {ICustomPattern} interface.",type:Ar.LexerDefinitionErrorType.INVALID_PATTERN,tokenTypes:[n]}}),i=(0,Ne.difference)(t,e);return{errors:r,valid:i}}Ze.findInvalidPatterns=sj;var uIe=/[^\\][\$]/;function lj(t){var e=function(n){ZH(s,n);function s(){var o=n!==null&&n.apply(this,arguments)||this;return o.found=!1,o}return s.prototype.visitEndAnchor=function(o){this.found=!0},s}($H.BaseRegExpVisitor),r=(0,Ne.filter)(t,function(n){var s=n[Lo];try{var o=(0,ej.getRegExpAst)(s),a=new e;return a.visit(o),a.found}catch(l){return uIe.test(s.source)}}),i=(0,Ne.map)(r,function(n){return{message:`Unexpected RegExp Anchor Error:
- Exclude checks
Unexpected tabs found. Open
`+(""+s.join(`
- Exclude checks
Unexpected tabs found. Open
is no longer a Token vector (since v4.0).`);if(typeof e[0].startOffset=="number")throw Error(`The Parser constructor no longer accepts a token vector as the first argument.
- Exclude checks