WordPress mangling HTML

Turn off the visual editor entirely, then it won’t mangle that sort of thing when you edit the post.

The option is at Users->My Profile.

I noticed this too with some javascript.
I’ve decided to use the “Include Me In That HTML” plugin (https://www.ads-software.com/extend/plugins/include-me-in-that-html/). That way I can put the common routines in a directory and just include them.

You could use the FCUK editor plugin. That works html perfectly… not sure how other plugins integrate with it though.

Hrm, thanks for the replies guys.

I think I’ll file it as a bug, as this probably need addressing?

From others’ comments in other threads it’s clear that TinyMCE imposes its will on the simplest of markup, paragraph and line-breaks. From this material here the wee beast evidently doesn’t restrict itself to re-writing just the basics!

FWIW I’m cobbling together a page relating to this *nasty rotten cussed* editor issue.

Addendum (got caught by “post too old”):
In “How to stop TinyMCE from pulling MS styles from Word docs” azaozz points to a potent functionality:
Rich Text Editor Filters states “mce_valid_elements – applied to the comma-delimited list of valid HTML tags for the rich editor. Any elements not in this list will automatically be removed …” and then *sigh* points to a TinyMCE doc that is 404 at the moment.

Further codex work : https://codex.www.ads-software.com/How_Wordpress_Processes_Entry_Text