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10 - Hold Shift and Check Checkboxes #17

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10 - Hold Shift and Check Checkboxes #17

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126 changes: 126 additions & 0 deletions 10 - Hold Shift and Check Checkboxes/changi.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(
'.inbox input[type="checkbox"]'
);

let lastChecked;
function handleCheck(evt) {
let inBetween = false;

if (evt.shiftKey && this.checked) {
checkboxes.forEach((checkbox) => {
if (checkbox === lastChecked || checkbox === this) {
inBetween = !inBetween;
}

if (inBetween) {
checkbox.checked = true;
}
});
}

lastChecked = this;
}

checkboxes.forEach((checkbox) => {
checkbox.addEventListener("click", handleCheck);
});
</script>
</body>
</html>