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/** * @fileoverview Rule to enforce spacing around embedded expressions of template strings * @author Toru Nagashima * @deprecated in ESLint v8.53.0 */ "use strict"; //------------------------------------------------------------------------------ // Requirements //------------------------------------------------------------------------------ const astUtils = require("./utils/ast-utils"); //------------------------------------------------------------------------------ // Rule Definition //------------------------------------------------------------------------------ /** @type {import('../shared/types').Rule} */ module.exports = { meta: { deprecated: true, replacedBy: [], type: "layout", docs: { description: "Require or disallow spacing around embedded expressions of template strings", recommended: false, url: "https://eslint.org/docs/latest/rules/template-curly-spacing" }, fixable: "whitespace", schema: [ { enum: ["always", "never"] } ], messages: { expectedBefore: "Expected space(s) before '}'.", expectedAfter: "Expected space(s) after '${'.", unexpectedBefore: "Unexpected space(s) before '}'.", unexpectedAfter: "Unexpected space(s) after '${'." } }, create(context) { const sourceCode = context.sourceCode; const always = context.options[0] === "always"; /** * Checks spacing before `}` of a given token. * @param {Token} token A token to check. This is a Template token. * @returns {void} */ function checkSpacingBefore(token) { if (!token.value.startsWith("}")) { return; // starts with a backtick, this is the first template element in the template literal } const prevToken = sourceCode.getTokenBefore(token, { includeComments: true }), hasSpace = sourceCode.isSpaceBetween(prevToken, token); if (!astUtils.isTokenOnSameLine(prevToken, token)) { return; } if (always && !hasSpace) { context.report({ loc: { start: token.loc.start, end: { line: token.loc.start.line, column: token.loc.start.column + 1 } }, messageId: "expectedBefore", fix: fixer => fixer.insertTextBefore(token, " ") }); } if (!always && hasSpace) { context.report({ loc: { start: prevToken.loc.end, end: token.loc.start }, messageId: "unexpectedBefore", fix: fixer => fixer.removeRange([prevToken.range[1], token.range[0]]) }); } } /** * Checks spacing after `${` of a given token. * @param {Token} token A token to check. This is a Template token. * @returns {void} */ function checkSpacingAfter(token) { if (!token.value.endsWith("${")) { return; // ends with a backtick, this is the last template element in the template literal } const nextToken = sourceCode.getTokenAfter(token, { includeComments: true }), hasSpace = sourceCode.isSpaceBetween(token, nextToken); if (!astUtils.isTokenOnSameLine(token, nextToken)) { return; } if (always && !hasSpace) { context.report({ loc: { start: { line: token.loc.end.line, column: token.loc.end.column - 2 }, end: token.loc.end }, messageId: "expectedAfter", fix: fixer => fixer.insertTextAfter(token, " ") }); } if (!always && hasSpace) { context.report({ loc: { start: token.loc.end, end: nextToken.loc.start }, messageId: "unexpectedAfter", fix: fixer => fixer.removeRange([token.range[1], nextToken.range[0]]) }); } } return { TemplateElement(node) { const token = sourceCode.getFirstToken(node); checkSpacingBefore(token); checkSpacingAfter(token); } }; } };