Warning Error

  • Resolved hjean

    (@hjean)


    1 year ago


    Hi Support,

    Warning Error found after inspecting a few pages (ERROR WARNING BELOW). Is this something that will resolve itself or will necessary action be needed for this? Thank you in advance for any feedback.

    siteground-optimizer…6db4e45ef21bb.js:14 [Deprecation] Listener added for a synchronous ‘DOMNodeInserted’ DOM Mutation Event. This event type is deprecated (https://w3c.github.io/uievents/#legacy-event-types) and work is underway to remove it from this browser. Usage of this event listener will cause performance issues today, and represents a risk of future incompatibility. Consider using MutationObserver instead.

    The page I need help with: [log in to see the link]

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  • Plugin Support Delyan Delov

    (@delyandelov)

    Hi @hjean,

    The warning you are receiving in your browser (I believe Chrome browser) is related to the upcoming change announced by Chrome:
    https://developer.chrome.com/blog/mutation-events-deprecation
    https://chromestatus.com/feature/5083947249172480
    This, however, should not alarm you as many plugins are still using DOMNodeInserted DOM Mutation Event in their code. In fact, you can search for the “DOMNodeInserted” string under your plugins/ folder and find which plugins exactly are using the event.

    Since you have enabled the JS Combination functionality in our plugin, all the JS code is gathered in one combined JS file, where the warning is generated from.

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