js verify regex 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: javascript boolean regex match

//RegExp.prototype.test()

str = 'ok';
regex = /ok/;

console.log(regex.test(str)) // => true