When someone interacts with a webpage, the browser sends events to the relevant JavaScript code. The touchmove event happens when a finger moves while in contact with the screen.
When touchmove happens
A finger moves while in contact with the screen.
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
<div id="demo-target" style="padding: 2rem; border: 1px solid">Touch here on a touchscreen</div>
<p id="event-status" role="status">Waiting for touchmove...</p>
<script>
const eventTarget = document.getElementById("demo-target");
const eventStatus = document.getElementById("event-status");
if (eventTarget) {
eventTarget.addEventListener("touchmove", (eventDetails) => {
eventStatus.textContent = "touchmove event received";
console.log(eventDetails.type, eventDetails.target);
});
}
</script>
Reading the code
The browser listens for touchmove 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.
Drag a finger across the target; passive listener defaults may affect preventDefault.
Pointer events work across several input devices. Touch events are tied to touch-capable platforms; when possible, prefer a pointer-based implementation with accessible keyboard controls.
Try it in your browser
Open the page, show the Console panel, and follow this test: Drag a finger across the target; passive listener defaults may affect preventDefault. Then change one thing in the example and observe whether the event still fires.
Common Beginner Mistakes
- Expecting
touchmoveto fire without its required user action or browser condition. - Drag a finger across the target; passive listener defaults may affect preventDefault.
- Adding repeated event listeners without considering cleanup or unwanted side effects.
Key Takeaways
touchmovereports a finger moves while in contact with the screen.addEventListener("touchmove", ...)listens for the event on the appropriate target.- Drag a finger across the target; passive listener defaults may affect preventDefault.