Why does the | in this regexp not just or the two child expressions?

Here is a snippet of the problem I am running into

console.log(/^true|false|(([-+/*^]?\d+(\.\d+)?)*)$/.test('foo'))
console.log(/^true|false$/.test('foo'))
console.log(/^([-+/*^]?\d+(\.\d+)?)*$/.test('foo'))

This works fine in other regexp testers, but js consistently fails this test. Can anyone explain what I’m doing wrong here. Thank you

>Solution :

^a|b|c$ means ^a or b or c$

So first expression should be

console.log(/^(true|false|(([-+\/*^]?\d+(\.\d+)?)*))$/.test('foo'))