The js_api you need to know

. Splice () method 1. Delete: Two parameters, the first parameter is to delete the first position, the second is the number of deletions.

2 Insert: Inserts any option element into the specified position of the array, the first parameter is in fact the position, the second parameter 0, and the third parameter is the inserted item.

3 Replace: Inserts any item element at the specified position in the array, deleting any number of elements, and three parameters. The first parameter is the starting position, the second is the number of items deleted, and the third is the insertion of any number of items.

The js_api you need to know