# Email Input Field Trigger
## 1. Add the HTML Form [#1-add-the-html-form]
Ensure your HTML form includes the `surface-form-handler` class. This class is essential for identifying the form as one that triggers the Surface Form popup. Example:
```html
```
Add the **`surface-form-handler`** class to any external form that you want to use to trigger the Surface Form popup.
## 2. Surface Form Constructor [#2-surface-form-constructor]
Go to the **`public/index.html`** file in your React.js project and add the following code at the end of **``** tag:
Add the `data-question-id` attribute to your Surface form script.
You must replace the **``** within **`data-question-id`** attribute below with the question ID from the Surface Form Builder.
```html
```