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("./utils/ast-utils");
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = {
meta: {
type: "suggestion",
docs: {
description: "disallow throwing literals as exceptions",
category: "Best Practices",
recommended: false,
url: "https://eslint.org/docs/rules/no-throw-literal"
},
schema: [],
messages: {
object: "Expected an error object to be thrown.",
undef: "Do not throw undefined."
}
},
create(context) {
return {
ThrowStatement(node) {
if (!astUtils.couldBeError(node.argument)) {
context.report({ node, messageId: "object" });
} else if (node.argument.type === "Identifier") {
if (node.argument.name === "undefined") {
context.report({ node, messageId: "undef" });
}
}
}
};
}
};