// html <body>
<div id="app">
<input type="text" v-model="number">
<input type="text" v-model="num">
<input type="button" v-click="increment" value="加1">
<input type="button" v-click="increment" value="加2">
<h3 v-bind="number"></h3>
<h3 v-bind="num"></h3>
</div>
</body>
// js vue的实例 window.onload = function () {
var app = new Vue({
el: '#app',
data: {
number: ,
num: ,
},
methods: {
increment: function () {
this.number++;
this.num++;
},
}
})
}
// vue的构造函数 function Vue(options) {
this._init(options);
}
Vue.prototype._init = function (options) {
this.$options = options;
this.$el = document.querySelector(options.el);
this.$data = options.data;
this.$methods = options.methods; this._binding = {};
this._obverse(this.$data);
this._complie(this.$el);
}
Vue.prototype._obverse = function (obj) {
var _this = this
for (let key in obj) {
if (obj.hasOwnProperty(key)) {
this._binding[key] = {
_directives: []
};
let value = obj[key];
if (typeof value === 'object') {
this._obverse(value);
}
let binding = this._binding[key];
Object.defineProperty(this.$data, key, {
enumerable: true,//目标属性是否可以被枚举。true | false
configurable: true, //目标属性是否可以被删除或是否可以再次修改特性 true | false
get: function () {
return value;
},
set: function (newVal) {
if (value !== newVal) {
value = newVal;
binding._directives.forEach(function (item) {
item.update();
})
}
}
})
}
}
} Vue.prototype._complie = function (root) {
var _this = this;
var nodes = root.children;
for (let i = ; i < nodes.length; i++) {
let node = nodes[i];
if (node.children.length) {
_this._complie(node);
} if (node.hasAttribute('v-click')) {
node.onclick = (function () {
var attrVal = nodes[i].getAttribute('v-click');
return _this.$methods[attrVal].bind(_this.$data);
})(i);
} if (node.hasAttribute('v-model') && (node.tagName == 'INPUT' || node.tagName == 'TEXTAREA')) {
node.addEventListener('input', (function() {
var attrVal = node.getAttribute('v-model');
_this._binding[attrVal]._directives.push(new Watcher(
'input',
node,
_this,
attrVal,
'value'
))
return function () {
_this.$data[attrVal] = nodes[key].value;
}
})());
}
if(node.hasAttribute("v-bind")){
var attrVal = node.getAttribute('v-bind');
_this._binding[attrVal]._directives.push(new Watcher(
'text',
node,
_this,
attrVal,
'innerHTML'
))
}
}
}
function Watcher(name, el, vm, exp, attr) {
this.name = name; //指令名称,例如文本节点,该值设为"text"
this.el = el; //指令对应的DOM元素
this.vm = vm; //指令所属myVue实例
this.exp = exp; //指令对应的值,本例如"number"
this.attr = attr; //绑定的属性值,本例为"innerHTML" this.update();
}
Watcher.prototype.update = function () {
this.el[this.attr] = this.vm.$data[this.exp];
}