jsx-no-duplicate-props.js
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/**
* @fileoverview Enforce no duplicate props
* @author Markus Ånöstam
*/
'use strict';
// ------------------------------------------------------------------------------
// Rule Definition
// ------------------------------------------------------------------------------
module.exports = function (context) {
var configuration = context.options[0] || {};
var ignoreCase = configuration.ignoreCase || false;
return {
JSXOpeningElement: function (node) {
var props = {};
node.attributes.forEach(function(decl) {
if (decl.type === 'JSXSpreadAttribute') {
return;
}
var name = decl.name.name;
if (ignoreCase) {
name = name.toLowerCase();
}
if (props.hasOwnProperty(name)) {
context.report(decl, 'No duplicate props allowed');
} else {
props[name] = 1;
}
});
}
};
};
module.exports.schema = [{
type: 'object',
properties: {
ignoreCase: {
type: 'boolean'
}
},
additionalProperties: false
}];