113 lines
3.5 KiB
JavaScript
113 lines
3.5 KiB
JavaScript
/**
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* @fileoverview Disallow or enforce spaces around equal signs in JSX attributes.
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* @author ryym
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*/
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'use strict';
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const docsUrl = require('../util/docsUrl');
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const getSourceCode = require('../util/eslint').getSourceCode;
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const report = require('../util/report');
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// ------------------------------------------------------------------------------
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// Rule Definition
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// ------------------------------------------------------------------------------
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const messages = {
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noSpaceBefore: 'There should be no space before \'=\'',
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noSpaceAfter: 'There should be no space after \'=\'',
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needSpaceBefore: 'A space is required before \'=\'',
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needSpaceAfter: 'A space is required after \'=\'',
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};
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/** @type {import('eslint').Rule.RuleModule} */
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module.exports = {
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meta: {
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docs: {
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description: 'Enforce or disallow spaces around equal signs in JSX attributes',
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category: 'Stylistic Issues',
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recommended: false,
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url: docsUrl('jsx-equals-spacing'),
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},
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fixable: 'code',
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messages,
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schema: [{
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enum: ['always', 'never'],
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}],
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},
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create(context) {
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const config = context.options[0] || 'never';
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/**
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* Determines a given attribute node has an equal sign.
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* @param {ASTNode} attrNode - The attribute node.
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* @returns {boolean} Whether or not the attriute node has an equal sign.
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*/
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function hasEqual(attrNode) {
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return attrNode.type !== 'JSXSpreadAttribute' && attrNode.value !== null;
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}
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// --------------------------------------------------------------------------
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// Public
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// --------------------------------------------------------------------------
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return {
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JSXOpeningElement(node) {
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node.attributes.forEach((attrNode) => {
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if (!hasEqual(attrNode)) {
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return;
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}
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const sourceCode = getSourceCode(context);
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const equalToken = sourceCode.getTokenAfter(attrNode.name);
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const spacedBefore = sourceCode.isSpaceBetweenTokens(attrNode.name, equalToken);
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const spacedAfter = sourceCode.isSpaceBetweenTokens(equalToken, attrNode.value);
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if (config === 'never') {
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if (spacedBefore) {
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report(context, messages.noSpaceBefore, 'noSpaceBefore', {
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node: attrNode,
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loc: equalToken.loc.start,
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fix(fixer) {
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return fixer.removeRange([attrNode.name.range[1], equalToken.range[0]]);
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},
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});
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}
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if (spacedAfter) {
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report(context, messages.noSpaceAfter, 'noSpaceAfter', {
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node: attrNode,
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loc: equalToken.loc.start,
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fix(fixer) {
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return fixer.removeRange([equalToken.range[1], attrNode.value.range[0]]);
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},
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});
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}
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} else if (config === 'always') {
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if (!spacedBefore) {
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report(context, messages.needSpaceBefore, 'needSpaceBefore', {
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node: attrNode,
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loc: equalToken.loc.start,
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fix(fixer) {
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return fixer.insertTextBefore(equalToken, ' ');
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},
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});
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}
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if (!spacedAfter) {
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report(context, messages.needSpaceAfter, 'needSpaceAfter', {
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node: attrNode,
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loc: equalToken.loc.start,
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fix(fixer) {
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return fixer.insertTextAfter(equalToken, ' ');
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},
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});
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}
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}
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});
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},
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};
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},
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};
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