Quasar. Dev/vue – directi…

What does Mutation mean?

The MutationObserver interface provides the ability to monitor changes made to the DOM tree. It is designed as a replacement for the older Mutation Events feature, which is part of the DOM3 Events specification.

Developer.mozilla.org/zh-CN/docs/…

Two, the current effect to achieve

Effect:

3. According to the example on the official website, I wrote the following code: