How to hang a handler inside the iframe After Dynamic loading Iframe?

About what you need to hang the onload for the iframe I know, but my iframe appears after N time download third-party script. And therefore, the event $(iframe).load(function ...) never comes.
How to achieve this?
April 7th 20 at 11:06
1 answer
April 7th 20 at 11:08
1. mutation observer
2. see addedNodes frame
3. to hang the handler on the content of the frame as usual

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