1. Create a new html document, add an input tag in the body tag, the tag type is button, set an id for this tag, and then import the jquery file:
2. Get the input label with the previously set id, and the code format is $('#id name'). At this point, the input tag with the previously set id will be selected:
3. Add an attr function to the selected label, and the parameter of the function is name. At this point, the name value in the button is obtained: