update bootstrap to version 4.3.1

1 files changed, 20 insertions, 0 deletions

diff --git a/vendor/twbs/bootstrap/site/docs/4.3/examples/checkout/form-validation.js b/vendor/twbs/bootstrap/site/docs/4.3/examples/checkout/form-validation.js
new file mode 100644
index 000000000..280849408
--- /dev/null
+++ b/vendor/twbs/bootstrap/site/docs/4.3/examples/checkout/form-validation.js
@@ -0,0 +1,20 @@
+// Example starter JavaScript for disabling form submissions if there are invalid fields
+(function () {
+  'use strict'
+
+  window.addEventListener('load', function () {
+    // Fetch all the forms we want to apply custom Bootstrap validation styles to
+    var forms = document.getElementsByClassName('needs-validation')
+
+    // Loop over them and prevent submission
+    Array.prototype.filter.call(forms, function (form) {
+      form.addEventListener('submit', function (event) {
+        if (form.checkValidity() === false) {
+          event.preventDefault()
+          event.stopPropagation()
+        }
+        form.classList.add('was-validated')
+      }, false)
+    })
+  }, false)
+}())