[Javascript][Regex] Regex test does not select all items from a list

[javascript] RegEx g flag <> test

flag: g >> remember lastIndex

/c/ig.test('ccc') // true
/c/ig.test('ccc') // false

// vs
/c/i.test('ccc') // true
/c/i.test('ccc') // true

Don’t use g if you want to test several times Or Before another test, you should make test return false

시나리오

Senario

I want to get all items that contains my search words. I used Regex test to filter a list.

const regex = new Regex("search", "ig");

const list = [
    "abc",
    "abd",
    "a",
    "b",
];

const filteredList = list.filter((s) => regex.test(s));

// I expect ["abc", "abd"], but I got ["abc"];

Problem

only got [”abc”]

Solution

You need to remove “g” from the flags

Don’t use g if you want to test several times Or Before another test, you should make test return false

const regex = new Regex("search", "i");

const list = [
    "abc",
    "abd",
    "a",
    "b",
];

const filteredList = list.filter((s) => regex.test(s)); // ["abc", "abd"]