Typing Test Project in JavaScript

This JavaScript project creates a web-based typing test. It allows you to check your typing speed and accuracy.It works by measuring the time it takes to type a given text and comparing it with the original text.

The core functionality includes starting a timer when you begin typing, comparing your input to the provided text, and displaying the time and accuracy.

It’s helpful for those looking to improve their typing speed and accuracy by providing real-time feedback.

How to Create a Typing Test App in JavaScript

1. First create the HTML structure for the typing test app as follows. It sets up the structure of the typing test application. You can customize the title, header, and test text as per your preference.

<header class="masthead">
        <h1>Test Your Typing Speed</h1>
    </header>
    <main class="main">
        <article class="intro">
            <p>DO IT. DO IT NOW.</p>
        </article><!-- .intro -->
        <section class="test-area">
            <div id="origin-text">
  <p>Why do they call me Mr. Happy?</p>
            </div><!-- #origin-text -->

            <div class="test-wrapper">
                <textarea id="test-area" name="textarea" rows="6" placeholder="The clock starts when you start typing."></textarea>
            </div><!-- .test-wrapper -->

            <div class="meta">
                <section id="clock">
                    <div class="timer">00:00:00</div>
                </section>

                <button id="reset">Start over</button>
            </div><!-- .meta -->
        </section><!-- .test-area -->
    </main>

2. The CSS code (style.css) is responsible for the visual styling of the application. Make sure to include it in the HTML file within the <head> section. You can modify the styles to match your design preferences.

body,
button,
input,
select,
textarea {
	font-family: 'Source Sans Pro', 'Helvetica', Arial, sans-serif;
	font-size: 18px;
	line-height: 1.5;
}

h1,
h2,
h3,
h4,
h5,
h6 {
	clear: both;
}

p {
	margin-bottom: 1.5em;
}

b,
strong {
	font-weight: bold;
}

dfn,
cite,
em,
i {
	font-style: italic;
}

blockquote {
	margin: 0 1.5em;
}

address {
	margin: 0 0 1.5em;
}

pre {
	background: #eee;
	font-family: "Courier 10 Pitch", Courier, monospace;
	font-size: 15px;
	font-size: 1.5rem;
	line-height: 1.6;
	margin-bottom: 1.6em;
	max-width: 100%;
	overflow: auto;
	padding: 1.6em;
}

code,
kbd,
tt,
var {
	font: 15px Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace;
}

abbr,
acronym {
	border-bottom: 1px dotted #666;
	cursor: help;
}

mark,
ins {
	background: #fff9c0;
	text-decoration: none;
}

sup,
sub {
	font-size: 75%;
	height: 0;
	line-height: 0;
	position: relative;
	vertical-align: baseline;
}

sup {
	bottom: 1ex;
}

sub {
	top: .5ex;
}

small {
	font-size: 75%;
}

big {
	font-size: 125%;
}

/*--------------------------------------------------------------
Layout
--------------------------------------------------------------*/
body {
    margin: 0;
    padding: 0;
}

.masthead {
    padding: 1em 2em;
    background-color: #0D1B2E;
    color: white;
}

.masthead h1 {
    text-align: center;
}

.intro {
    padding: 2em 2em;
    color: #ffffff;
    background: #429890;
}


.intro p,
.test-area {
    margin: 0 auto;
    max-width: 550px;
}

.test-area {
    margin-bottom: 4em;
    padding: 0 2em;
}

.test-wrapper {
    border: 10px solid grey;
    border-radius: 10px;
}

#origin-text {
    margin: 1em 0;
    padding: 1em 1em 0;
    background-color: #ededed;
}

#origin-text p {
    margin: 0;
    padding-bottom: 1em;
}

.test-wrapper {
    display: flex;
}

.test-wrapper textarea {
    flex: 1;
}

.meta {
    margin-top: 1em;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.timer {
    font-size: 3em;
    font-weight: bold;
}

#reset {
    padding: .5em 1em;
    font-size: 1.2em;
    font-weight: bold;
    color: #E95D0F;
    background: white ;
    border: 10px solid #E95D0F;
}

#reset:hover {
    color: white;
    background-color: #E95D0F;
}

3. Finally, add the following JavaScript code to your project. It contains the logic for the typing test. It’s essential to understand how it works:

const testWrapper = document.querySelector(".test-wrapper");
const testArea = document.querySelector("#test-area");
const originText = document.querySelector("#origin-text p").innerHTML;
const resetButton = document.querySelector("#reset");
const theTimer = document.querySelector(".timer");


var timer = [0,0,0,0];
var interval;
var timerRunning = false;

// Add leading zero to numbers 9 or below (purely for aesthetics):
function leadingZero(time) {
    
    if (time <= 9) {
        
        time = "0" + time;
    }
    
    return time;
}

// Run a standard minute/second/hundredths timer:
function runTimer() {
    
    let currentTime = leadingZero(timer[0]) + ":" + leadingZero(timer[1]) + ":" + leadingZero(timer[2]);
    
    theTimer.innerHTML = currentTime;
    timer[3]++;
    
    timer[0] = Math.floor((timer[3]/100)/60);
    timer[1] = Math.floor((timer[3]/100) - (timer[0] * 60));
    timer[2] = Math.floor(timer[3] - (timer[1] * 100) - (timer[0] * 6000));
}

// Match the text entered with the provided text on the page:
function spellCheck() {
    
    let textEntered = testArea.value;
    let originTextMatch = originText.substring(0, textEntered.length);
    
    if(textEntered == originText) {
        
        clearInterval(interval);
        
        testWrapper.style.borderColor = "#339900";
        
    } else {
        
        if(textEntered  == originTextMatch) {
            
            testWrapper.style.borderColor = "#E55400";
        } else {
            
            testWrapper.style.borderColor = "#FF0000";
        }
    }
    
}

// Start the timer:
function start() {
    
    let textEnteredLength = testArea.value.length;
    
    if (textEnteredLength === 0 && !timerRunning ){
        
        timerRunning = true;
        interval = setInterval(runTimer, 10);
    }
    
    console.log(textEnteredLength);
}

// Reset everything:
function reset() {
    
    clearInterval(interval);
    interval = null;
    
    timer = [0,0,0,0];
    timerRunning = false;
    
    testArea.value = "";
    theTimer.innerHTML = "00:00:00";
    testWrapper.style.borderColor = "grey";
}


// Event listeners for keyboard input and the reset button:
testArea.addEventListener("keypress", start, false);
testArea.addEventListener("keyup", spellCheck, false );
resetButton.addEventListener("click", reset, false);

That’s all! hopefully, you have successfully created a Typing test Project in JavaScript. If you have any questions or suggestions, feel free to comment below.

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Code Snippet:	Javascript Speed Type Test
Author:	Mike Batruch
Published:	January 10, 2024
Last Updated:	January 22, 2024
Downloads:	629

License:	MIT
Edit Code online:	View on CodePen

How to Create a Typing Test App in JavaScript

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