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vue中调用data提示undefined

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vue中调用data提示undefined

我在vue的methods自己定义的方法中console.log(this)指向的是VUE，但是我console.log(this.data)反而提示underfined,这是为什么？求大神解惑


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by (71.8m points)

vue实例中并没有data这个属性。
在data(){} 方法中的数据 会被赋值在_data属性上 如果你调用this._data 可以看到你定义的数据
image.png
image.png

源代码写的很清楚 最终赋值给了vm._data 属性


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