The creation of HTML5 has been driven by an ongoing internal tension.

validating forms using html5-9

But if it goes too far in the other direction, the specification will enshrine tags and tables for layout because, after all, that’s what a huge number of web pages are built with.

It’s a delicate balancing act that requires a pragmatic, levelheaded approach.

Regex class for validate any input string for any specific format.

The following example will allow you to Input Phone Number only.

In fact, though, the doctype for HTML5 is very pragmatic.

Because HTML5 needs to support existing content, the doctype could be applied to an existing HTML 4.01 or XHTML 1.0 document.

According to the priority of constituencies, we web designers have an even stronger voice.

If we refuse to use part of the specification, then the specification is equally fictitious.

The W3C rediscovered the lesson of post-revolutionary France: changing existing behavior is very, very difficult.