JSFiddle - React, Tailwind, and code Playground

by mjmitche

HTML

<h1>
        Searching strings with Regular Expressions</h1>
    <p id="sourceText">
        I really like JavaScript. It&#39;s a fun, versatile language to program in. In fact,
        I&#39;d have to say that JavaScript is probably my all-time favorite programming
        language. I think that everyone should learn how to program in JavaScript!</p>
    <form method="post">
    <input name="Button1" type="button" value="Find" id="btnFind" /></form>

JavaScript

function findString(sourceString, patternToFind) {
        var result = sourceString.search(patternToFind);
        if (result == -1)
            alert("Pattern not found");
            else alert("pattern was found at position:" + result);
        }

        function countMatches(sourceString, patternToFind, patLength) {
        }

        function doSearch() {
            findString(document.getElementById('sourceText').innerHTML, /javascript/i);
            countMatches(document.getElementById('sourceText').innerHTML,/javascript/, 10);
        }

        window.onload = function() {
            document.getElementById('btnFind').onclick = doSearch;
        }