JSFiddle - React, Tailwind, and code Playground

JavaScript

var sentenceOne = "Pretty kitty doesn't like you!";
var sentenceTwo = "Preachy cat loves you.";

alert(startsWith(sentenceOne, "Pre") === startsWith(sentenceTwo, "Pre"));

function startsWith(string, pattern) {
    return string.slice(0, pattern.length) == pattern;
}