regex checkk string code example

Example 1: javascript regex .test

const str = 'hello world!';
const result = /^hello/.test(str);

console.log(result); // true

/**
The test() method executes a search for a match between 
a regular expression and a specified string
*/

Example 2: js match any number string

const match = 'some/path/123'.match(/\/(\d+)/)
const id = match[1] // '123'