js functions

// find sub string
const string = "foo";
const substring = "oo";
console.log(string.includes(substring)); // true

// replace string
let text = "Visit Microsoft!";
let result = text.replace("Microsoft", "W3Schools");

//regex for height
var regex = /\d\'\d\'\'/; //Example: 5'7''
var regex1 = /\d\'\d\d\'\'/; //Example: 5'11''
if (regex.test(height) === true || regex1.test(height) === true ) {
    new_height = height;
}