Vue中Watcher代码是什么呀？

监听一个事件，事件发生改变时触发

Watcher

var watchExampleVM = new Vue(f
el:

*#watch-example'
data: {

question:
answer: I cannot give you an answer until you ask a question!'

watchi f

question: function (newQuestion, oldQuestion) (

this.answer = 'Waiting for you to stop typing...

this.debouncedGetAnswer)

created: function ()

this.debouncedGetAnswer=

•debounce(this.getAnswer,500)