Is W3C validation important

Question

I read about validation from many sources and most will say always validate your web page. It is important that your page validate.

I understand the concept. But my site does not "validate", yet it works across every major browsers, does not produce errors in those browsers and looks correct in all browsers.

This is an example of an error I get

Error Line 38, Column 28: document type does not allow element "h3" here

var $jsuccessmessage = "<h3>We will be in contact soon. </h3>"; // success mess…

The element named above was found in a context where it is not allowed. This
could mean that you have incorrectly nested elements -- such as a "style"
element in the "body" section instead of inside "head" -- or two elements
that overlap (which is not allowed).

So I ask, how important is it that I correct these errors and do my best to produce fully validated code?

Answer 1

try using use W3C conventions as much as possible and these convention are going to be the most cross-browser compatible.

Sites don't need to comply to W3C standards to work across browsers Having valid code is just "the right thing" to do,

Everything you build that is non-standard anchors you in the present and leaves you stuck in the past next month. There's no good reason to wear concrete boots when surfing and even less reason for your clients to wear them.