v148 · removal · platform hygiene

Event Migration Scanner

Paste JavaScript code, click Scan — find every document.createEvent() call, see which interfaces Chrome 148 removed, and auto-fix them to modern constructors.

Real-world examples

Input — paste JavaScript here

// Paste code here, or pick a preset above
var evt = document.createEvent('MouseEvent');
evt.initMouseEvent('click', true, true, window, 0, 0, 0, 0, 0,
  false, false, false, false, 0, null);
element.dispatchEvent(evt);

var customEvt = document.createEvent('CustomEvent');
customEvt.initCustomEvent('myEvent', true, true, {detail: 42});
element.dispatchEvent(customEvt);

var popState = document.createEvent('PopStateEvent');
popState.initEvent('popstate', false, false);

Scan results

Click "Scan" to analyse code above.

Full interface compatibility matrix (Chrome 148)

Interface string	Chrome 148 status	Modern replacement

implementation reference

Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗

see also

implementation reference