Constraint Validation: Native Client Side Validation for Web Forms - HTML5 Rocks
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Forward Thinking Form Validation
Form validation has been a finicky business since the web was born. First came the server-side validation error summary. Then we evolved to client-side validation to verify results inline. Now, we have the marching giant that is HTML5 and CSS3: HTML5’s forms chapter offers new input types and attributes that make validation constraints possible. CSS3’s basic UI module provides several pseudo-class
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HTML5 Form Validation with Style - DZone
