I use this code to insert <bgsound> tag.
EmbeddedWB.Doc2.body.insertAdjacentHTML('afterBegin','<bgsound src="chimes.wav">');
Ignore for a second that <bgsound> is obsolete. I am working with it because in IE6 it works.
But nothing is present in the HTML source after above operation. At first I assumed something is wrong with above code until I tried this:
EmbeddedWB.Doc2.body.insertAdjacentHTML('afterBegin','<p>chimes.wav</p>');
At the above it correctly inserts <p> tag just after the <body> as it should. So why it won't insert <bgsound> then?
Also, something weird happens if I insert <audio> tag instead:
EmbeddedWB.Doc2.body.insertAdjacentHTML('afterBegin','<audio src="chimes.wav">some audio</audio>');
After this in source all I see is some audio</audio> without the opening tag.
I am beginning to wonder if the above doesn't work because I am in designer mode, is this possible cause why it won't insert <bgaudio>? Tried to insert some other tags too... for example comments also didn't work (<!-- comment -->).
Edit: Later I tried FEATURE_BROWSER_EMULATION in registry and after setting to 11001 (0x2AF9 Internet Explorer 11 mode) both <audio> and <bgsound> tags were inserted properly from edit mode. But it must be possible in older mode doesn't it?
After a lot of wasted time here are some things I discovered:
Internet Explorer control strips tags which it thinks are invalid when using
insertAdjacentHTMLor eveninnerHTML. There doesn't seem to be a way (that I know of) to insert any custom HTML code which the control will not try to validate. In IE6 where I was testing it it thinks that<bgsound>and<audio>tags are invalid so it strips them. It should not do that for<bgsound>but it does. Same goes for comments like<!-- comment -->.I found no way to insert the tag using
insertAdjacentHTMLorinnerHTML. The best I could do is to wrap the sound tag inside some other tag - if I do that, the sound does play when inserted but it is still absent from source. Finally I inserted it directly into generated HTML before saving the HTML to disk (I tagged that sound was added and before saving HTML I inserted it into HTML without relying on MSHTML).Switching to standards mode e.g. by using registry entry
FEATURE_BROWSER_EMULATIONcorrectly inserts tags but won't work on some versions of Internet Explorer (I believe the minimum version would be IE9 for this to work) so it is less flexible.I found no solution for this but at least I have some workarounds. Perhaps it helps someone in the future.