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// This implementation only tests support for interactive form validation.
// To check validation for a specific type or a specific other constraint,
// the test can be combined:
// - Modernizr.inputtypes.numer && Modernizr.formvalidation (browser supports rangeOverflow, typeMismatch etc. for type=number)
// - Modernizr.input.required && Modernizr.formvalidation (browser supports valueMissing)
//
(function(document, Modernizr){
Modernizr.formvalidationapi = false;
Modernizr.formvalidationmessage = false;
Modernizr.addTest('formvalidation', function() {
var form = document.createElement('form');
if ( !('checkValidity' in form) || !('addEventListener' in form) ) {
return false;
}
if ('reportValidity' in form) {
return true;
}
var invalidFired = false;
var input;
Modernizr.formvalidationapi = true;
// Prevent form from being submitted
form.addEventListener('submit', function(e) {
//Opera does not validate form, if submit is prevented
if ( !window.opera ) {
e.preventDefault();
}
e.stopPropagation();
}, false);
// Calling form.submit() doesn't trigger interactive validation,
// use a submit button instead
//older opera browsers need a name attribute
form.innerHTML = '<input name="modTest" required><button></button>';
Modernizr.testStyles('#modernizr form{position:absolute;top:-99999em}', function( node ) {
node.appendChild(form);
input = form.getElementsByTagName('input')[0];
// Record whether "invalid" event is fired
input.addEventListener('invalid', function(e) {
invalidFired = true;
e.preventDefault();
e.stopPropagation();
}, false);
//Opera does not fully support the validationMessage property
Modernizr.formvalidationmessage = !!input.validationMessage;
// Submit form by clicking submit button
form.getElementsByTagName('button')[0].click();
});
return invalidFired;
});
})(document, window.Modernizr);
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