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Versions: 43
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Contents
/**
* @fileoverview Enforce no duplicate props
* @author Markus Ånöstam
*/
'use strict';
const has = require('has');
const docsUrl = require('../util/docsUrl');
// ------------------------------------------------------------------------------
// Rule Definition
// ------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: 'Enforce no duplicate props',
category: 'Possible Errors',
recommended: true,
url: docsUrl('jsx-no-duplicate-props')
},
schema: [{
type: 'object',
properties: {
ignoreCase: {
type: 'boolean'
}
},
additionalProperties: false
}]
},
create: function (context) {
const configuration = context.options[0] || {};
const ignoreCase = configuration.ignoreCase || false;
return {
JSXOpeningElement: function (node) {
const props = {};
node.attributes.forEach(decl => {
if (decl.type === 'JSXSpreadAttribute') {
return;
}
let name = decl.name.name;
if (typeof name !== 'string') {
return;
}
if (ignoreCase) {
name = name.toLowerCase();
}
if (has(props, name)) {
context.report({
node: decl,
message: 'No duplicate props allowed'
});
} else {
props[name] = 1;
}
});
}
};
}
};
Version data entries
43 entries across 43 versions & 1 rubygems