Sha256: 056d1e8e52899e9567f1a0f28f6ae1f470ecdb92438b74f4189cf7506570b75a
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Size: 1.57 KB
Versions: 45
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Contents
/**
* @fileoverview Rule to flag use of duplicate keys in an object.
* @author Ian Christian Myers
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: "disallow duplicate keys in object literals",
category: "Possible Errors",
recommended: true
},
schema: []
},
create: function(context) {
return {
ObjectExpression: function(node) {
// Object that will be a map of properties--safe because we will
// prefix all of the keys.
var nodeProps = Object.create(null);
node.properties.forEach(function(property) {
if (property.type !== "Property") {
return;
}
var keyName = property.key.name || property.key.value,
key = property.kind + "-" + keyName,
checkProperty = (!property.computed || property.key.type === "Literal");
if (checkProperty) {
if (nodeProps[key]) {
context.report(node, property.loc.start, "Duplicate key '{{key}}'.", { key: keyName });
} else {
nodeProps[key] = true;
}
}
});
}
};
}
};
Version data entries
45 entries across 45 versions & 2 rubygems