1, today in debug code when an error has been reported as follows, looking for a long page and found no _wrapper it.
_Error in nextTick: "TypeError: Cannot read property '_wrapper' of undefined"
2, and @click method registered the page is out of order, resulting in a pile of assorted error occurs
3. Solution:
In fact, this is the wrong method your @click event binding, does not exist in methods, to see if the add function.