Problems encountered by Vue project

Assigning data subscripts in Vue is not responsive. This function is to select and highlight the small tags under each large tag.

https://cn.vuejs.org/v2/guide/reactivity.html#%E6%A3%80%E6%B5%8B%E5%8F%98%E5%8C%96%E7%9A%84%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9

Therefore, you need to push the data and then pop it to perform some operations on the array to become responsive.