Embed player in web page embed element autostart false invalid

Recently, I encountered the need to embed a player in a web page to play sound files at work. Finally, I used the embed element code as follows:

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The code is as follows:

To prevent it from making a sound when the page is first loaded, set the autostart attribute to false. If you want to play the sound, call the play method of the embed element to play the sound.

It worked at first, but after a while, I found that the autostart attribute of the embed element was invalid. Even if it was set to false, it would still play automatically once when the page was loaded. I searched for a long time and finally found the answer through Google. Adding the following code can solve the problem

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The code is as follows:

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