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10-dom-projects.html
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10-dom-projects.html
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<!DOCTYPE html>
<head>
<title>DOM Projects</title>
<style>
body {
font-family: Arial;
}
.subscribe-button {
border: none;
background-color: black;
color: white;
border-radius: 2px;
padding-top: 10px;
padding-bottom: 10px;
padding-right: 15px;
padding-left: 15px;
font-weight: bold;
border-radius: 50px;
cursor: pointer;
margin-bottom: 30px;
}
.is-subscribed {
background-color: rgb(240, 240, 240);;
color: black;
}
.cost-input {
font-size: 15px;
padding: 10px;
}
.calculate-button {
background-color: green;
color: white;
border: none;
font-size: 15px;
padding: 12px 15px;
cursor: pointer;
}
</style>
</head>
<body>
<p> YouTube Subscribe Button</p>
<button onclick="
Subscribe();
" class="js-subscribe-button subscribe-button" >Subscribe</button>
<p>
Amazon Shipping Calculator
</p>
<input placeholder="Cost of order" class="js-cost-input cost-input" onkeydown="
handleCostKeydown(event);
">
<button onclick="
calculateTotal();
" class="calculate-button">Calculate</button>
<p class="js-total-cost"></p>
<script>
// number to string
String(25);
// dont do math in the following way:
// console.log('25'-5);
// console.log('25'+5);
// window represents everything in the window of the browser
// document means the following:
window.document
// consolee.log is actually the following:
window.console.log('window');
function handleCostKeydown(event) {
if(event.key === 'Enter'){
calculateTotal();
}
}
function calculateTotal() {
const inputElement = document.querySelector('.js-cost-input');
// we use innerHTML to get the inner HTML text in js, but since input element doesnt have any text we use .value
// when we get value from DOM it is a string >> so we have to switch from string to number:
let cost = Number(inputElement.value);
if (cost < 40) {
cost = cost + 10;
}
document.querySelector('.js-total-cost')
.innerHTML = `$${cost}`;
}
function Subscribe() {
const buttonElement = document.querySelector('.js-subscribe-button');
// inner Text gets u the text so there is no problem if there are extra spaces before or after the name.
if(buttonElement.innerText === 'Subscribe'){
buttonElement.innerHTML = 'Subscribed';
buttonElement.classList.add('is-subscribed');
}
else{
buttonElement.innerHTML = 'Subscribe';
buttonElement.classList.remove('is-subscribed');
}
}
</script>
</body>
</html>