ResizeObserver.unobserve()

The unobserve() method of the ResizeObserver interface ends the observing of a specified Element or SVGElement.

Syntax

void unobserve(target);

Parameters

target

A reference to an Element or SVGElement to be unobserved.

Return value

Void.

Exceptions

None.

Examples

The following snippet is taken from the resize-observer-text.html (see source) example:

const resizeObserver = new ResizeObserver(entries => {
  for (let entry of entries) {
    if(entry.contentBoxSize) {
      h1Elem.style.fontSize = Math.max(1.5, entry.contentBoxSize.inlineSize/200) + 'rem';
      pElem.style.fontSize = Math.max(1, entry.contentBoxSize.inlineSize/600) + 'rem';
    } else {
      h1Elem.style.fontSize = Math.max(1.5, entry.contentRect.width/200) + 'rem';
      pElem.style.fontSize = Math.max(1, entry.contentRect.width/600) + 'rem';
    }
  }
});

resizeObserver.observe(divElem);

checkbox.addEventListener('change', () => {
  if(checkbox.checked) {
    resizeObserver.observe(divElem);
  } else {
    resizeObserver.unobserve(divElem);
  }
});

Specifications

Browser compatibility