Question

How can I check if embed tag exist in my html.
I’ve created this tag through javascript

    soundEmbed = document.createElement("embed");
    soundEmbed.setAttribute("src", "notify.wav");
    soundEmbed.setAttribute("hidden", true);
    soundEmbed.setAttribute("autostart", true);
    soundEmbed.setAttribute("loop", false);
    document.body.appendChild(soundEmbed);

but since I am using autorefresh and appendChild, every time it refresh it creates additional sound.

Using appendChild, I think I’ve got many embed tags. That’s what I think maybe the cause of additional sound.

Answer 1

Add soundEmbed.id = "__soundEmbed"; before appending. Then, surround the entire thing with:

if( !document.getElementById("__soundEmbed")) {
    soundEmbed = ......;
    ......
}