Validating html code

A few months ago Sandeep introduced us to the HTML Constraint API, showing how we can use the new HTML5 input types and attributes to validate our forms in the browser with minimal Java Script.Today I’m going to walk you through validating a simple booking form by using the Constraint API, and keep an eye on how you can make sure your forms stay accessible too.Don't rely on the user's browser to be forgiving of bad HTML & CSS. CSS HTML Validator is designed to be nothing but the best tool there is for finding HTML, XHTML, and CSS problems in the easiest way possible.It makes the critically important duty of checking your web documents as productive and thorough as possible.This might include Firefox, Google Chrome, Opera, Safari, Internet Explorer and the increasing number of mobile browsers.Making sure that the HTML & CSS is correct is the first step in making sure that a site will display correctly in multiple browsers.If the page doesn't contain a Doc Type declaration or the Doc Type isn't recognized, Expression Web uses a secondary schema.

Any HTML or CSS problems could be especially harmful for viewers using browsers on mobile devices, so this is another great reason to validate your web documents.Strictly speaking, you should make sure you're using the HTML5 DOCTYPE, otherwise you'll run into HTML validation errors.But the great thing about them is that they all degrade gracefully.Different browsers use different rendering engines so tricks used to make HTML render as desired in one browser may not work in another browser or even in an earlier or later version of the same browser.Fortunately, browsers today are driving toward standards compliance, and proprietary elements like "layer" and "ilayer" are being dropped.

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