formvalidation_CSSDayForm validation Peter-Paul Koch http://quirksmode.org http://twitter.com/ppk Browser API Special, 15 June 2017 Form validation Literally the oldest trick in the JavaScript book. Netscape 2 could do form validation, and little else. Modern input types • type=“date” • type=“email” • required • pattern • and so on Modern input types • Automatically validated • Automatically get native error messages
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