check intersectionObserver exsits before destroy it #4375
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| // setInViewport(false) before #unlayoutCallback | ||
| this.intersectionObserver_.destroy(); | ||
| this.intersectionObserver_ = null; | ||
| if (this.intersectionObserver_) { |
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No need to check here, it's guaranteed if iframe_ is present.
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Looks like |
Contributor
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Fixes #4372. |
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Author
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you're right. amp-ad will create intersectionObserver anyway. removed check for ad |
mkhatib
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ariangibson
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mityaha
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