Run results for: closest vs querySelector

Goal: Get the target element inside the DOM Test case #1 - You don't have the target id - Find a target element through DOM via Element.closest() Test case #2 - You have the target id from your state - Find the target element via Document.querySelector()

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 131

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

querySelector

9.4M/s

closest

6.1M/s

View exact numbers

Test name	Executions per second
✓ querySelector	9,441,166 Ops/sec
closest	6,134,320 Ops/sec

HTML Preparation code:

<div><div><div>

<div data-parent="parent-id">

  <div><div>

    <div data-target="target-id">

      <div><div>

        <div data-clicked="clicked-id"></div>

      </div></div>

    </div>

  </div></div>

</div>

</div></div></div>

Script Preparation code:

var clicked = document.querySelector('[data-clicked]')
var parentEl = document.querySelector('[data-parent="parent-id"]')

Tests:

closest
clicked.closest('[data-target]')
querySelector
parentEl.querySelector('[data-target="target-id"]')