如何在表单提交前等待3秒？ [英] How to wait 3 seconds before form submits?

问题描述

我有以下代码：

function checkAmount() {
  var PayField = document.getElementById('paymentamount');
  var Pound = document.getElementById('pound');

  if (PayField.value == "") {
    PayField.style.border = '1px #F00 solid';
    Pound.style.color = '#F00';
    alert('You need to enter an amount that you wish to donate');

    return false;
  }
  return true;
}

当用户输入有效金额并点击付款按钮时，表单应该等待3秒然后等待3秒后提交。

When a user types a valid amount and clicks the pay button, the form should wait 3 seconds then submits after waiting 3 seconds.

我尝试使用 setTimeout（），但是它根本不起作用。我不想用jQuery，你能给我一个代码怎么做。

I've tried using setTimeout() with it, but it doesn't work at all. I don't want to use jQuery with this, can you provide me a code how to do it.

推荐答案

添加一个ID到您的表格：

Add an ID to your form:

<form id="whatever">

然后，在你的JavaScript中：

Then, in your JavaScript:

var waited = false;
function checkAmount()
{
    var PayField = document.getElementById('paymentamount');
    var Pound = document.getElementById('pound');

    if (PayField.value == "")
    {
        PayField.style.border = '1px #F00 solid';
        Pound.style.color = '#F00';
        alert('You need to enter an amount that you wish to donate');

        return false;
    }
    if (waited)
    {
        return true;
    }
    waited = true;
    setTimeout(function() { document.getElementById('whatever').submit() }, 3000);
    return false;
}

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