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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Hold Shift to Check Multiple Checkboxes</title>
</head>
<body>
<style>
html {
font-family: sans-serif;
background: #ffc600;
}
.inbox {
max-width: 400px;
margin: 50px auto;
background: white;
border-radius: 5px;
box-shadow: 10px 10px 0 rgba(0,0,0,0.1);
}
.item {
display: flex;
align-items: center;
border-bottom: 1px solid #F1F1F1;
}
.item:last-child {
border-bottom: 0;
}
input:checked + p {
background: #F9F9F9;
text-decoration: line-through;
}
input[type="checkbox"] {
margin: 20px;
}
p {
margin: 0;
padding: 20px;
transition: background 0.2s;
flex: 1;
font-family:'helvetica neue';
font-size: 20px;
font-weight: 200;
border-left: 1px solid #D1E2FF;
}
</style>
<!--
The following is a common layout you would see in an email client.
When a user clicks a checkbox, holds Shift, and then clicks another checkbox a few rows down, all the checkboxes inbetween those two checkboxes should be checked.
-->
<div class="inbox">
<div class="item">
<input type="checkbox">
<p>This is an inbox layout.</p>
</div>
<div class="item">
<input type="checkbox">
<p>Check one item</p>
</div>
<div class="item">
<input type="checkbox">
<p>Hold down your Shift key</p>
</div>
<div class="item">
<input type="checkbox">
<p>Check a lower item</p>
</div>
<div class="item">
<input type="checkbox">
<p>Everything in between should also be set to checked</p>
</div>
<div class="item">
<input type="checkbox">
<p>Try to do it without any libraries</p>
</div>
<div class="item">
<input type="checkbox">
<p>Just regular JavaScript</p>
</div>
<div class="item">
<input type="checkbox">
<p>Good Luck!</p>
</div>
<div class="item">
<input type="checkbox">
<p>Don't forget to tweet your result!</p>
</div>
</div>
<script>
const checkboxes = document.querySelectorAll('[type = "checkbox"]');
console.log(checkboxes);
let lastChecked;
function handleCheck(e) {
let inBetween = false;
if(e.shiftKey && this.checked) {
checkboxes.forEach(checkbox => {
console.log(checkbox);
if(checkbox === this || checkbox === lastChecked) {
inBetween = !inBetween;
console.log('Starting to check then in between');
}
if(inBetween) {
checkbox.checked = true;
}
});
}
lastChecked = this;
}
checkboxes.forEach(checkbox => {
checkbox.addEventListener('click', handleCheck);
})
</script>
</body>
</html>