为什么报错了啊

源自：3-1 todolist功能开发

代码:

methods:{
    handleSubmit:function(){
        this.list.push(this.inputValue)
        this.inputValue=""
    }

报错了:

test4.html:25 Uncaught TypeError: this.list.push is not a function

at Vue.handleSubmit (test4.html:25)

at invoker (vue.js:2032)

at HTMLButtonElement.fn._withTask.fn._withTask (vue.js:1831)

提问者：qq_莫莫_14 2018-07-12 10:23