I want to find or make a bookmarklet that will validate the html content of a currently viewed page using the W3C HTML 5 validator.  I have found two bookmarklets and am trying to get one to behave a bit like one and a bit like the other, however I a...

I am trying to validate my page as HTML 5 (W3c). And I have the following error: The "img" element is not allowed here (as a child of the "noscript" element). The "noscript" element, when a child of "head", must contai...

I have a generic function that returns URLs. (It's a plugin function that returns URLs to resources [images, stylesheets] within a plugin).   I use GET parameters in those URLs.   If I want to use these URLs within a HTML page, to pass W3C valida...

i do want to build a validator for HTML tagname ,      vdAPI.get({module:'html',subject:'tag'}).validator=function (tag){          return !vdAPI.nottags.contains(tag) && (tag.length>0 && tag.length <= vdAPI.MAX_L...

I want a single program that recursively finds all *.js, *.html and *.css files in a given directory and JSLints, and W3C validates them respectively and prints out all errors found. Also it separately JSLints and CSS validates anything found inside...

My HTML is almost HTML5-compliant according to the W3C Validator, only one error is remaining: the Javascript code to configure the Google Plus buttons.   Whether I add CDATA or not, the error "The text content of element script was not in the re...

Is there a way to have non-standard attributes like  onselectstart oncontextmenu  ...   in a tag, and still pass validation as HTML 4.01 transitional somehow?  Apart from adding the properties later on using Javascript....

I'm currently reading a lot about different JS frameworks (EmberJS, AngularJS, etc.).  On first sight, I loved AngularJS' idea of using directives like custom HTML tags:  <mytag>...</mytag>   But isn't this dangerous? If I def...

Here's my code:  <a href="#">     <img src="myimage.jpg"       onmouseover="showDescription(           'Text', 'Text with HTML tags in them<br />More text');"       onmouseout="revertDesc...

I know from an historical perspective that it has always been frowned upon to not gracefully degrade when a visitor with Javascript disabled visits a site but how relevant is this now?  I'm asking since an application I'm building is going to...