Introduction to action and onSubmit examples of Form forms_HTML/Xhtml_Web page production

First: action is an attribute of the form. HTML5 has defined it as a required attribute value. onSubmit is an event. A function verification is performed when submitting through . .

Second: When it comes to the order of execution, my personal understanding is that onSubmit comes first, and verification comes first. When verification returns false, the action="url" address cannot be reached. If true is returned or there is no return value, pass and redirect to the url address.

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The code is as follows:

function check(){
var oText = document.getElementById("in").value;
alert(oText);
if(oText == "false"){
return false;
}
else {
return true;}
}

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The code is as follows:

onSubmit="return Fun();" The return here must be written, isn't it? If you don’t write it, you can try it! ! !

In short: onSubmit is for verification, and action is the link address after the jump.