In this lab, I followed the instruction from JavaScript30 and recreated the Key Sequence Detection activity. First off, I made the HTML, CSS, and JavaScript files. Secondly, the <html>, <head>, <body>, <meta>, and <title> tags were already inserted in the HTML file. Thirdly, I typed in <link rel="stylesheet" type="text/css" href="Lab_26.css"> inside the <head> tags to link the CSS file with my HTML file. Fourthly, I typed in <script src="Lab_26.js" type="text/javascript"></script> inside the <body> tags which linked my JavaScript file with my HTML file. Inside the <body> tags, I typed the heading for the lab which has my name, date, and lab number with <div id="heading"><h1>Lab 19</h1><h2>Wei Jian Zhen</h2><h3>12/24/2019</h3></div>. Lastly, I made the copyright notice with <p> and <div> tags. For the CSS I did html {width: 100%; height: auto;} body {background-color: #00FFA8; min-width: 100%; min-height: 100%;} to give the webpage a background color and make the webpage responsive to screen size changes. #heading {text-align: center; font-size: 16px;} to center the heading of the lab. #copyright {font-size: 16px; font-family: Baskerville, "Palatino Linotype", Palatino, "Century Schoolbook L", "Times New Roman", "serif"; font-weight: normal; padding-left: 1%; padding-right: 1%;} to change the font of the copyright notice. Next I typed in .hint {text-align: center; font-size: 24px; margin: 0;} .highlight {background-color: yellow; text-decoration: underline;} to highlight the hints. For the JavaScript, I put:
const pressed = [];
const secretCode = 'march';
window.addEventListener('keyup', (e) => {
console.log(e.key);
pressed.push(e.key);
pressed.splice(-secretCode.length - 1, pressed.length - secretCode.length);
if (pressed.join('').includes(secretCode)) {
console.log('DING DING!');
cornify_add();
}
console.log(pressed);
});
to make the secret code activate when pressed the certain keys. Knowing how to use key sequence detection is useful to a web designer in registering user input.
Link:
http://techteach.us/Web2020/ZWeiJian/WCP/Labs/Lab_26/Lab_26.html
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