JQuery learning notes-toArray () _ jquery

Jquery. toArray () is to convert jQuery objects into arrays.

From the source code, we can see that these common methods are directly from the native
In javascript, why do I say this?
In row 3, this points to the jQuery object at runtime. The call statement uses the slice method as a reference to cut out an array, it's really amazing.
Slice (start, end) is used to split the array.
Start indicates the start position of the split array.
If end is omitted, it indicates that the end is from start to end.