setPolling(false) cannot turn off polling

[nbdd0121]

Perhaps the code mean

 if (this.$pollSizeChangesTimer) {
    clearInterval(this.$pollSizeChangesTimer);
    this.$pollSizeChangesTimer = 0;
}

instead of

 if (this.$pollSizeChangesTimer)
    this.$pollSizeChangesTimer;

Since the latter one makes no sense at all.

What's more, probably we can use MutationObserver to replace the polling if supported

[nightwing]

Thanks for the bug report, i've added suggested fix to #2459.

What's more, probably we can use MutationObserver to replace the polling if supported

Does MutationObserver allow to detect when size of element is changed due to zoom or font style change? AFAIK it should be only for attribute or children modifications.

[nbdd0121]

Does MutationObserver allow to detect when size of element is changed due to zoom or font style change? AFAIK it should be only for attribute or children modifications.

MutationObserver can be used to detect inline style change, ex. the style attribute or setting of style via JavaScript. However style sheet changes and zoom will not be detected. So you are right, we shouldn't use it.

[felicienfrancois]

CSS Element queries uses a event based approach for size change detection

new ResizeSensor(jQuery('#myElement'), function() {
    console.log('myelement has been resized');
});

It uses a invisible new element as an overlay on the desired target and utilize the "scroll" event on the overlay to trigger changes

Could be a solution ...