109 lines
3.3 KiB
JavaScript
109 lines
3.3 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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// ------------------------------------------------------------------------------
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// Rule Definition
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// ------------------------------------------------------------------------------
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module.exports = {
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meta: {
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docs: {
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description: 'Disallow or enforce 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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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];
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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 = context.getSourceCode();
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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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switch (config) {
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default:
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case 'never':
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if (spacedBefore) {
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context.report({
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node: attrNode,
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loc: equalToken.loc.start,
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message: 'There should be no space before \'=\'',
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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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context.report({
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node: attrNode,
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loc: equalToken.loc.start,
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message: 'There should be no space after \'=\'',
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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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break;
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case 'always':
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if (!spacedBefore) {
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context.report({
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node: attrNode,
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loc: equalToken.loc.start,
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message: 'A space is required before \'=\'',
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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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context.report({
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node: attrNode,
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loc: equalToken.loc.start,
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message: 'A space is required after \'=\'',
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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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break;
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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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