HTMLButtonElement: interestForElement property

Value

An Element object instance, or null if the associated <button> element does not have a target element set.

Examples

Basic interestForElement usage

In this example, we use a <button> element's interestForElement property to set its target element and then retrieve the target element's tagName. The tagName is then printed in the <button> element's text content.

HTML

We include a <button> element and a <div> element. We turn the <div> element into a popover by setting a popover attribute on it.

<button href="#">a button</button>
<div id="mypopover" popover>I am a <code>&lt;div&gt;</code> element.</div>

JavaScript

We get references to the <button> and <div> elements in script, then declare an interest invoker-target relationship between the <button> and the <div> by setting the <button> element's interestForElement property equal to a reference to the <div>. We then set the button's text content equal to a string containing the target element's tagName, retrieved via invoker.interestForElement.tagName.

const invoker = document.querySelector("button");
const popover = document.querySelector("div");

invoker.interestForElement = popover;

invoker.textContent = `My target is a ${invoker.interestForElement.tagName} element`;

Result

The example renders like this:

Try showing interest in the button (for example, by hovering or focusing it) to make the <div> appear.

Specifications

Browser compatibility

See also

• Using interest invokers
• The Popover API