no-throw-literal.js
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/**
* @fileoverview Rule to restrict what can be thrown as an exception.
* @author Dieter Oberkofler
*/
"use strict";
const astUtils = require("../ast-utils");
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: "disallow throwing literals as exceptions",
category: "Best Practices",
recommended: false
},
schema: []
},
create(context) {
return {
ThrowStatement(node) {
if (!astUtils.couldBeError(node.argument)) {
context.report({ node, message: "Expected an object to be thrown." });
} else if (node.argument.type === "Identifier") {
if (node.argument.name === "undefined") {
context.report({ node, message: "Do not throw undefined." });
}
}
}
};
}
};