invalid submit attribute

Author: nielslyngsoe

packages/uui-base/lib/mixins/FormControlMixin.ts

@@ -222,6 +222,9 @@ export const FormControlMixin = <T extends Constructor<LitElement>>(
       this._removeFormListeners();
       this._form = this._internals.form;
       if (this._form) {
+        if (this._form.hasAttribute('invalid-submit')) {
+          this.pristine = false;
+        }
         this._form.addEventListener('submit', this._onFormSubmit);
       }
     }

packages/uui-input/lib/uui-input-form-example.ts

@@ -44,9 +44,12 @@ export class UUIInputInFormExampleElement extends LitElement {
 
     const isValid = this._form.checkValidity();
     if (!isValid) {
+      this._form.setAttribute('invalid-submit', '');
       return;
     }
 
+    this._form.removeAttribute('invalid-submit');
+
     const formData = new FormData(this._form);
 
     for (const value of formData.values()) {