页面通过表单验证后未重定向到条带结帐

Question

我正在使用 HTML 5 required 属性进行表单验证。现在我想要的是，如果表单已通过 HTML 5 验证，它应该将用户带到条带结帐（我故意在下面的代码中为 SO 问题 xxx 输出信息）。

现在如果表单没有通过验证，提交不会处理，这很好。但是在我完成表格并提交表格后，它并没有将我带到条纹结帐页面，它只是刷新了页面。我做错了什么？

<form id="tcform">

<p><b>Quantity:</b> 1</p>
<b class="price">Price:</b> <s>£xx</s> <span style="color: red;">£xx</span>
<button class="btn btn-default buynow" id="checkout-button-sku_xxx" role="link">
     Buy Now
    </button>
    <p>
    <i style="font-size:small">Limited time offer</i>
    </p>

  <p class="tcparagraph">
  <input id="field_terms" type="checkbox" required name="terms"> I accept the <u><a href="Terms" id="tclink">Terms and Conditions</a></u></p>

  <div id="error-message"></div>
  </form>

<script>
    (function() {

        var stripe = Stripe('pk_test_xxx');

        var checkoutButton = document.getElementById('checkout-button-sku_xxx');

        checkoutButton.addEventListener('click', function() {
            // When the customer clicks on the button, redirect
            // them to Checkout.

            const isFormValid = checkoutButton.form.checkValidity();

            if(isFormValid==true) {

            stripe.redirectToCheckout({
                    items: [{
                        sku: 'sku_xxx',
                        quantity: 1
                    }],

                    // Do not rely on the redirect to the successUrl for fulfilling
                    // purchases, customers may not always reach the success_url after
                    // a successful payment.
                    // Instead use one of the strategies described in
                    // https://stripe.com/docs/payments/checkout/fulfillment
                    successUrl: window.location.protocol + '//metis-online.com/courses/course-BRFAITC009-order-confirmation',
                    cancelUrl: window.location.protocol + '//metis-online.com/order-cancelled',
                })
                .then(function(result) {
                    if (result.error) {
                        // If `redirectToCheckout` fails due to a browser or network
                        // error, display the localized error message to your customer.
                        var displayError = document.getElementById('error-message');
                        displayError.textContent = result.error.message;
                    }
                });
            }

        });
    })();
</script>

Answer 1

您想阻止提交表单的默认行为。这样做：

checkoutButton.addEventListener('click', function(event) {

...

if(isFormValid==true) {
    event.preventDefault();

参考文献

• Prevent Default on Form Submit
• Event.preventDefault()

Answer 2

现在，如果表单在页面加载时有效，您的代码只会附加 click 侦听器。在没有其他表单行为的情况下，单击表单中的按钮会将其提交回它来自的页面，这就是它看起来像页面刷新的原因。

您需要像这样在按钮单击事件处理程序中移动表单检查：

<script>
    (function() {
        var stripe = Stripe('pk_test_xxx');
        var checkoutButton = document.getElementById('checkout-button-sku_xxx');

        checkoutButton.addEventListener('click', function() {
            if($('#tcform')[0].checkValidity()){

                // When the customer clicks on the button, redirect
                // them to Checkout.
                stripe.redirectToCheckout({
                    items: [{
                        sku: 'sku_xxx',
                        quantity: 1
                    }],

                    // Do not rely on the redirect to the successUrl for fulfilling
                    // purchases, customers may not always reach the success_url after
                    // a successful payment.
                    // Instead use one of the strategies described in
                    // https://stripe.com/docs/payments/checkout/fulfillment
                    successUrl: window.location.protocol + '//www.xxx.com',
                    cancelUrl: window.location.protocol + '//www.xxx.com',
                })
                .then(function(result) {
                    if (result.error) {
                        // If `redirectToCheckout` fails due to a browser or network
                        // error, display the localized error message to your customer.
                        var displayError = document.getElementById('error-message');
                        displayError.textContent = result.error.message;
                    }
                });
            }
        });
  })();

但听表单的submit 事件（https://developer.mozilla.org/en-US/docs/Web/API/HTMLFormElement/submit_event）可能会更好：

$('#tcform').on('submit', function() {
     stripe.redirectToCheckout({ 
         ...
     });
});

submit 事件仅在表单验证后才会发出。

Answer 3

As Jannes Botis said，你可以使用preventDefault。您也可以从 submit 事件的 eventHandler 上返回 false，这也将取消表单提交。参考见：https://www.geeksforgeeks.org/when-to-use-preventdefault-vs-return-false-in-javascript/

Answer 4

这也发生在我们身上。

我们已将novalidate attribute（删除 HTML5 验证）添加到表单并仅通过 javascript 对其进行验证。

    <form id="tcform" novalidate>
    ...
    </form>