jQuery的 - 如何取消表单提交防止条件为true时的默认值 [英] jQuery - How to cancel form submit prevent default when condition is true
问题描述
我有一个联系表单,当点击提交按钮时,我检查输入值,如果至少有一个输入为空,我运行一个alert并且preventDefault表单子表单,否则,我返回true。
I have a contact form that I check the input values when clicking on the submit button, if there's at least one input empty, I run an alert and preventDefault the form submition, else, I return true.
我的问题是,当我故意忽略一个输入时,我得到我想要的,但是如果我填充所有输入,我不能再提交表单...
My issue here is that when I deliberately omit an input, I get what I want, but then if I fill all the inputs, I can't submit the form any more...
jQuery(document).ready(function () {
jQuery('#envoyez').on('click', function () {
jQuery(':input').each(function () {
const val = jQuery.trim(jQuery(this).val());
if (val.length == 0) {
alert('Fill all the inputs please');
jQuery("form").submit(function(e){
e.preventDefault();
});
} else {
return true;
}
})
})
})
谢谢
Thanks
推荐答案
您应该在 .ready()
函数中声明表单事件侦听器。然后创建一个处理表单有效性的变量。
You should declare the form event listener in your .ready()
function. Then create a variable that handles validity of the form.
jQuery(document).ready(function () {
// count the number of inputs that are filled.
var clearCount = 0;
jQuery("form").submit(function(e) {
// here check if clearcount is not equal to the number of fields
if (clearCount != jQuery(':input').length)
{
// this means that one of the fields are not filled
e.preventDefault();
return false;
}
});
jQuery('#envoyez').on('click', function () {
// reset clearcount for revalidation
clearCount = 0;
jQuery(':input').each(function () {
const val = jQuery.trim(jQuery(this).val());
// check if input is not empty.
if (val.length > 0) {
clearCount++;
}
})
})
});
这只是解决问题的简单方法,但如果您想要一种更好的方法,只需简单地:
This is just a simple approach of fixing your problem though if you want a way more better method you could just simply:
jQuery(document).ready(function () {
jQuery("form").submit(function(e) {
// check if one of the fields are empty
// and so on
if ( jQuery(this).find("input[name='NAME1']").val().length == 0
|| jQuery(this).find("input[name='NAME2]").val().length == 0
|| jQuery(this).find("input[name='NAME3']").val().length == 0)
{
// this means that one of the fields are not filled
e.preventDefault();
return false;
}
});
});
希望有所帮助
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