HTML selectionchange DOM Event: Reference and Examples

When someone interacts with a webpage, the browser sends events to the relevant JavaScript code. The selectionchange event happens when the document or input text selection changes.

When selectionchange happens

The document or input text selection changes.

You can listen for it using addEventListener(). That keeps event handling separate from HTML attributes such as onclick and works well with modern code organization.

A small working example

<p id="demo-target">Select this sentence or inspect the page.</p>
<p id="event-status" role="status">Waiting for selectionchange...</p>
<script>
    const eventTarget = document;
    const eventStatus = document.getElementById("event-status");

    if (eventTarget) {
        eventTarget.addEventListener("selectionchange", (eventDetails) => {
            eventStatus.textContent = "selectionchange event received";
            console.log(eventDetails.type, eventDetails.target);
        });
    }
</script>

Reading the code

The browser listens for selectionchange on the relevant target. When the event occurs, the callback receives eventDetails, updates the status message and logs the event name and target in Developer Tools.

Select text in the page and inspect document.getSelection().

Some events need a specific browser condition, another tab or window, or a Web Component to reproduce. Read the trigger steps carefully before deciding that an event handler is not working.

Try it in your browser

Open the page, show the Console panel, and follow this test: Select text in the page and inspect document.getSelection(). Then change one thing in the example and observe whether the event still fires.

Common Beginner Mistakes

• Expecting selectionchange to fire without its required user action or browser condition.
• Select text in the page and inspect document.getSelection().
• Adding repeated event listeners without considering cleanup or unwanted side effects.

Key Takeaways

• selectionchange reports the document or input text selection changes.
• addEventListener("selectionchange", ...) listens for the event on the appropriate target.
• Select text in the page and inspect document.getSelection().