Javascript + CSS implement a bubble prompt box _ javascript tips-JS tutorial

The bubble prompt box involves the following technologies: JS responding to mouse events, making triangles with pure CSS, and attaching and sample code. If you are interested, refer to the next bubble prompt box to share it, the techniques used in the exercises include: (1) JS responding to mouse events; (2) making triangles with pure CSS.

The effect is as follows:

Here is html:

The Code is as follows:

Bubble dialog box