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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Understanding JavaScript's Capture</title>
</head>
<body class="bod">
<div class="one">
<div class="two">
<div class="three">
</div>
</div>
</div>
<style>
html {
box-sizing: border-box;
}
*, *:before, *:after {
box-sizing: inherit;
}
div {
width: 100%;
padding: 100px;
}
.one {
background: thistle;
}
.two {
background: mistyrose;
}
.three {
background: coral;
}
</style>
<button></button>
<script>
const divs = document.querySelectorAll('div');
function logText(e) {
console.log(this.classList.value);
e.stopPropagation(); //prevents bubbling and capturing
}
//this results in bubbling which means all three divs fire events from the bottom-up (innermost element first)
// divs.forEach(div => div.addEventListener('click', logText));
//this will turn on capture mode instead of bubbling. In simple words, the opposite of the above (firing events in top-bottom form)
// divs.forEach(div => div.addEventListener('click', logText, { capture: true }));
//this will turn off capture (which is the default)
divs.forEach(div => div.addEventListener('click', logText, { capture: false }));
//removes or unbinds the event from the element after firing it once. Useful if for example we want a sign-up or buy button to only be clicked once.
// divs.forEach(div => div.addEventListener('click', logText, { once: true }));
</script>
</body>
</html>