HTMLDetailsElement: toggle event
The toggle
event fires when the open
/closed
state of a <details>
element is toggled.
This event is not cancelable and does not bubble.
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
addEventListener("toggle", (event) => {});
ontoggle = (event) => {};
Event type
A generic Event
.
Examples
This example logs chapters that are open. Chapters are removed from the log when they are closed.
HTML
<aside id="log">
<p>Open chapters:</p>
<div data-id="ch1" hidden>I</div>
<div data-id="ch2" hidden>II</div>
<div data-id="ch3" hidden>III</div>
</aside>
<section id="summaries">
<p>Chapter summaries:</p>
<details id="ch1">
<summary>Chapter I</summary>
Philosophy reproves Boethius for the foolishness of his complaints against
Fortune. Her very nature is caprice.
</details>
<details id="ch2">
<summary>Chapter II</summary>
Philosophy in Fortune's name replies to Boethius' reproaches, and proves
that the gifts of Fortune are hers to give and to take away.
</details>
<details id="ch3">
<summary>Chapter III</summary>
Boethius falls back upon his present sense of misery. Philosophy reminds him
of the brilliancy of his former fortunes.
</details>
</section>
CSS
body {
display: flex;
flex-direction: row-reverse;
}
#log {
flex-shrink: 0;
padding-left: 3em;
}
#summaries {
flex-grow: 1;
}
JavaScript
function logItem(e) {
const item = document.querySelector(`[data-id=${e.target.id}]`);
item.toggleAttribute("hidden");
}
const chapters = document.querySelectorAll("details");
chapters.forEach((chapter) => {
chapter.addEventListener("toggle", logItem);
});
Result
Specifications
Specification |
---|
HTML Standard # event-toggle |
Browser compatibility
BCD tables only load in the browser