我在html中有4个输入框,我想检查其中一个还是多个为空。这段代码的问题是,当检查失败时,在每个新提交时,我都会收到递增数量的警报。意思是,如果第一次验证Value2失败,我收到1条警报,那么我插入了一个正确的Value2,但Value3错误,因此,对于Value3仅显示一个警报,我收到了一堆2条警报,依此类推。 。
<script>
function onSubmitNotification() {
var checkThisOnes = ["Value1", "Value2", "Value3", "Value4"];
$('#myform').submit(function() {
for (i = 0; i < checkThisOnes.length; i = i + 1) {
var checkedValue = $('#'+checkThisOnes[i]).val();
if (checkedValue === undefined || checkedValue === "") {
alert("This field is empty: " + checkThisOnes[i])
return false
}
}
});
</script>
use
event.preventDefault()
on submit. This will stop default submit behavior.I don't know why you need to use
onSubmitNotification()
but without that also it will work .Also,remove return false and usee.preventDefault()
to avoid default submission.演示代码: