78 lines
1.7 KiB
JavaScript
78 lines
1.7 KiB
JavaScript
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/**
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* @fileoverview Enforce no duplicate props
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* @author Markus Ånöstam
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*/
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'use strict';
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const has = require('hasown');
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const docsUrl = require('../util/docsUrl');
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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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noDuplicateProps: 'No duplicate props allowed',
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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: 'Disallow duplicate properties in JSX',
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category: 'Possible Errors',
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recommended: true,
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url: docsUrl('jsx-no-duplicate-props'),
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},
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messages,
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schema: [{
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type: 'object',
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properties: {
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ignoreCase: {
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type: 'boolean',
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},
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},
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additionalProperties: false,
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}],
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},
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create(context) {
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const configuration = context.options[0] || {};
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const ignoreCase = configuration.ignoreCase || false;
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return {
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JSXOpeningElement(node) {
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const props = {};
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node.attributes.forEach((decl) => {
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if (decl.type === 'JSXSpreadAttribute') {
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return;
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}
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let name = decl.name.name;
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if (typeof name !== 'string') {
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return;
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}
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if (ignoreCase) {
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name = name.toLowerCase();
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}
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if (has(props, name)) {
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report(context, messages.noDuplicateProps, 'noDuplicateProps', {
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node: decl,
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});
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} else {
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props[name] = 1;
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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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