How does jquery modify the entered name?

The method and operation steps are as follows:

1. First, create a new html file, as shown in the following figure.

2. Secondly, create a form, as shown in the figure below.

3. Then, click the Create button, as shown in the figure below.

4. Then, the preview effect is shown in the figure below.

5. Subsequently, introduce jquery.js, as shown in the figure below.

6. Then click the button jQuery to hide all input elements of type="checkbox ",as shown in the figure below.

7. Finally click the button to preview the effect, as shown in the figure below.