/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @emails react-core
*/
'use strict';
module.exports = {
meta: {
schema: [],
},
create(context) {
function report(node, name, msg) {
context.report(node, `Do not use the ${name} constructor. ${msg}`);
}
function check(node) {
const name = node.callee.name;
switch (name) {
case 'Boolean':
report(
node,
name,
'To cast a value to a boolean, use double negation: !!value'
);
break;
case 'String':
if (node.type === 'NewExpression') {
context.report(
node,
"Do not use `new String()`. Use String() without new (or '' + value for perf-sensitive code)."
);
}
break;
case 'Number':
report(
node,
name,
'To cast a value to a number, use the plus operator: +value'
);
break;
}
}
return {
CallExpression: check,
NewExpression: check,
};
},
};