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throw-new-error.js
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throw-new-error.js
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'use strict';
const {matches} = require('./selectors/index.js');
const {switchCallExpressionToNewExpression} = require('./fix/index.js');
const messageId = 'throw-new-error';
const messages = {
[messageId]: 'Use `new` when throwing an error.',
};
const customError = /^(?:[A-Z][\da-z]*)*Error$/;
const selector = [
'ThrowStatement',
' > ',
'CallExpression.argument',
matches([
// `throw FooError()`
[
'[callee.type="Identifier"]',
`[callee.name=/${customError.source}/]`,
].join(''),
// `throw lib.FooError()`
[
'[callee.type="MemberExpression"]',
'[callee.computed!=true]',
'[callee.property.type="Identifier"]',
`[callee.property.name=/${customError.source}/]`,
].join(''),
]),
].join('');
/** @param {import('eslint').Rule.RuleContext} context */
const create = context => ({
[selector]: node => ({
node,
messageId,
fix: fixer => switchCallExpressionToNewExpression(node, context.getSourceCode(), fixer),
}),
});
/** @type {import('eslint').Rule.RuleModule} */
module.exports = {
create,
meta: {
type: 'suggestion',
docs: {
description: 'Require `new` when throwing an error.',
},
fixable: 'code',
messages,
},
};