本节将看下初始化中的$options: Vue.prototype._init = function (options?: Object) { const vm: Component = this // a uid vm._uid = uid++ // a flag to avoid this being observed vm._isVue = true // merge options if (options && options._isComponent) { // optimize
var data = {a: 1} var vm = new Vue({ el: '#example', data: data, created: function () { // `this` 指向 vm 实例 console.log('created a is: ' + this.a = 2; }, mounted: function () { console.log('mounted a is: ' + } }) vm.$data === data // -> true vm.$el ==