Limited Availability DOM

moveBefore()

The moveBefore() DOM method relocates a node while preserving its state. For example, you can move the active element without losing focus, move an animated element without resetting the animation, or move an iframe without reloading its content.

Baseline Status: This feature is currently Limited (not yet Baseline). Latest engine implementation shipped on Oct 14, 2025.

Desktop Browser Engine Support

Google Chrome

133

Supported

Mozilla Firefox

144

Supported

Apple Safari

—

Unsupported

Microsoft Edge

133

Supported

Mobile Browser Engine Support

Chrome Android

133

Firefox Android

144

Safari iOS

—

Specifications and References

Specification ↗ Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

api.CustomElementRegistry.define.connectedMoveCallback_lifecycle_callback ↗ api.Document.moveBefore ↗ api.DocumentFragment.moveBefore ↗ api.Element.moveBefore ↗