How do you use onmouseup events in javascript?

Create an html file named onmouseup

Insert an img into the document and add the onmouseup event, calling the custom function when onmouseup is triggered

This article is based on experience

Create a custom function and set the width, height, and border of the picture in the function

The prompt is assigned to the p tag when the event is triggered

When the mouse is pressed down, the picture will be enlarged, and the picture border will be set, and the prompt message will be viewed in p