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| /** | |
| * @fileoverview Rule to disallow whitespace before properties | |
| * @author Kai Cataldo | |
| */ | |
| "use strict"; | |
| //------------------------------------------------------------------------------ | |
| // Requirements | |
| //------------------------------------------------------------------------------ | |
| const astUtils = require("./utils/ast-utils"); | |
| //------------------------------------------------------------------------------ | |
| // Rule Definition | |
| //------------------------------------------------------------------------------ | |
| module.exports = { | |
| meta: { | |
| type: "layout", | |
| docs: { | |
| description: "disallow whitespace before properties", | |
| category: "Stylistic Issues", | |
| recommended: false, | |
| url: "https://eslint.org/docs/rules/no-whitespace-before-property" | |
| }, | |
| fixable: "whitespace", | |
| schema: [] | |
| }, | |
| create(context) { | |
| const sourceCode = context.getSourceCode(); | |
| //-------------------------------------------------------------------------- | |
| // Helpers | |
| //-------------------------------------------------------------------------- | |
| /** | |
| * Reports whitespace before property token | |
| * @param {ASTNode} node the node to report in the event of an error | |
| * @param {Token} leftToken the left token | |
| * @param {Token} rightToken the right token | |
| * @returns {void} | |
| * @private | |
| */ | |
| function reportError(node, leftToken, rightToken) { | |
| const replacementText = node.computed ? "" : "."; | |
| context.report({ | |
| node, | |
| message: "Unexpected whitespace before property {{propName}}.", | |
| data: { | |
| propName: sourceCode.getText(node.property) | |
| }, | |
| fix(fixer) { | |
| if (!node.computed && astUtils.isDecimalInteger(node.object)) { | |
| /* | |
| * If the object is a number literal, fixing it to something like 5.toString() would cause a SyntaxError. | |
| * Don't fix this case. | |
| */ | |
| return null; | |
| } | |
| return fixer.replaceTextRange([leftToken.range[1], rightToken.range[0]], replacementText); | |
| } | |
| }); | |
| } | |
| //-------------------------------------------------------------------------- | |
| // Public | |
| //-------------------------------------------------------------------------- | |
| return { | |
| MemberExpression(node) { | |
| let rightToken; | |
| let leftToken; | |
| if (!astUtils.isTokenOnSameLine(node.object, node.property)) { | |
| return; | |
| } | |
| if (node.computed) { | |
| rightToken = sourceCode.getTokenBefore(node.property, astUtils.isOpeningBracketToken); | |
| leftToken = sourceCode.getTokenBefore(rightToken); | |
| } else { | |
| rightToken = sourceCode.getFirstToken(node.property); | |
| leftToken = sourceCode.getTokenBefore(rightToken, 1); | |
| } | |
| if (sourceCode.isSpaceBetweenTokens(leftToken, rightToken)) { | |
| reportError(node, leftToken, rightToken); | |
| } | |
| } | |
| }; | |
| } | |
| }; |