JAVASCRIPT

string match method

//The match() method searches a string for a match against a regular expression, and returns the matches, as an Array object.

// ex : Search a string for "ain":

let text = "The rain in SPAIN stays mainly in the plain";
text.match(/ain/g);

// >> ain,ain,ain

//if you find this answer is useful ,
//upvote ⇑⇑ , so can the others benefit also . @mohammad alshraideh ( ͡~ ͜ʖ ͡°)

string.regex match

const str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
const regexp = /[A-E]/gi;
const matches_array = str.match(regexp);

console.log(matches_array);
// ['A', 'B', 'C', 'D', 'E', 'a', 'b', 'c', 'd', 'e']

str.match

str.match(/^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])([a-zA-Z0-9]{8,})$/)