HTML5 and JavaScript验证表单

(function () { var inputs = document.Element('input'); var supports = {}; supports.autofocus = 'autofocus' in inputs; supports.required = 'required' in inputs; supports.placeholder = 'placeholder' in inputs; if (!supports.autofocus) { } if (!supports.required) { } if (!supports.placeholder) { } var send = document.getElementById('contact-submit'); if (send) { send.onclick = function () { this.innerHTML = '...Sending' } }})();

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