关于如何在表单上使用addEventListener拦截SUBMIT,有一个great answer here。 只要通过提交按钮(或ENTER)提交表单,它就能很好地工作。
虽然被解雇时完全被忽略了:
document.getElementById('myform').submit();
你会如何拦截这样的电话?
以下是例子:
<script>
function checkRegistration(){
var form_valid = (document.getElementById('some_input').value == 'google');
if(!form_valid){
alert('Given data is incorrect');
return false;
}
return true;
}
</script>
<form onsubmit="return checkRegistration()" method="get" action="http://google.com" id='myform'>
Write google to go to google..<br/>
<input type="text" id="some_input" value=""/>
<input type="submit" value="google it"/>
</form>
<a href="javascript:document.getElementById('myform').submit();">Ignore validation</a>
答案 0 :(得分:1)
确定。这是一个可能的解决方案,需要一些锤击但可能有效:
以下是您的样本:
<script>
function checkRegistration(){
var form_valid = (document.getElementById('some_input').value == 'google');
if(!form_valid){
alert('Given data is incorrect');
return false;
}
return true;
}
</script>
HTML:
<form onsubmit="return checkRegistration()" method="get" action="http://google.com" id='myform'>
Write google to go to google..<br/>
<input type="text" id="some_input" value=""/>
<input type="submit" value="google it"/>
</form>
<a href="javascript:document.getElementById('myform').submit();">Ignore validation</a>
这是一个开始捕获事件的算法。如果调用form.submit programmaticaly,而不是覆盖似乎被忽略的onsubmit事件,则必须覆盖表单的submit方法。
<script>
//document.getElementById('myform').onsubmit = function() {alert('testing'); return false;}
var form = document.getElementById('myform');
// Store the original method
var tmp = form.submit;
// create an intercept and override the submit method for the form with it
form.submit = function(){
var form_valid = (document.getElementById('some_input').value == 'google');
if(!form_valid){
alert('Given data is incorrect');
return false;
}
// when happy with the validation, apply the old method to the form
tmp.apply(form);
}
</script>
我在本地机器上试过它似乎工作。现在,您必须推广此算法以处理任意形式。这可能会解决你的问题。
答案 1 :(得分:0)
事件监听器仅在user action submits the form
时被触发
document.getElementById('myform').addEventListener(
"submit",
function(e){
e.preventDefault();
console.log("not submitting form");
}
);
//the following never triggers the event listener:
//https://stackoverflow.com/questions/645555/should-jquerys-form-submit-not-trigger-onsubmit-within-the-form-tag
//document.getElementById('myform').submit();
&#13;
<form id="myform">
<input type="submit" >
</form>
&#13;
解决方案可能是:
if(validation){
myForm.submit();
}
答案 2 :(得分:0)
我想我刚刚找到了你要找的东西。你应该直接设置动作让JS在提交时处理它。
function check(){
var form_valid = (document.getElementById('some_input').value == 'google');
if(!form_valid){
alert('Given data is incorrect');
return false;
}
return true;
}
&#13;
<form id="myform" action="javascript:check();">
<input type="text" id="some_input">
<input type="submit">
</form>
&#13;
<form ... action="javascript:function(){...}">