1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | <! DOCTYPE html> < head > < meta charset="UTF-8" /> < meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0" /> < meta http-equiv="X-UA-Compatible" content="ie=edge" /> < title >proxyVue</ title > < style > #app { margin: 100px auto 0 auto; width: 300px; } #btn { margin: 10px auto; } </ style > </ head > < body > < div id="app"> < input type="text" v-model="num" /> < input id="btn" type="button" value="添加到Todolist" v-click="addList" />< br /> < span >您输入的是:</ span >< span v-bind="num"></ span >< span >{{num}}</ span > < ul id="list"></ ul > </ div > </ body > < script > class proxyVue { constructor(options) { this.$options = options || {}; this.$methods = this._methods = this.$options.methods; const data = (this._data = this.$options.data); this.subscribe = {}; this.observe(data); this.compile(options.el); } publish(watcher) { if (!this.subscribe[watcher.property]) this.subscribe[watcher.property] = []; this.subscribe[watcher.property].push(watcher); } observe(data) { const that = this; let handler = { get(target, property) { return target[property]; }, set(target, property, value) { let res = Reflect.set(target, property, value); that.subscribe[property].map(item => { item.update(); }); return res; } }; this.$data = new Proxy(data, handler); } compile(el) { const nodes = Array.prototype.slice.call( document.querySelector(el).children ); let data = this.$data; nodes.map(node => { if (node.children.length > 0) this._complie(node); if (node.hasAttribute("v-bind")) { let property = node.getAttribute("v-bind"); this.publish(new Watcher(node, "innerHTML", data, property)); } if (node.hasAttribute("v-model")) { let property = node.getAttribute("v-model"); this.publish(new Watcher(node, "value", data, property)); node.addEventListener("input", () => { data[property] = node.value; }); } /** self ... */ if (/\{\{(.*?)\}\}/.test(node.innerHTML)) { let ret = /\{\{(.*?)\}\}/.exec(node.innerHTML) let property = ret[1]; this.publish(new Watcher(node, "innerHTML", data, property)); } // self end if (node.hasAttribute("v-click")) { let methodName = node.getAttribute("v-click"); let mothod = this.$methods[methodName].bind(data); node.addEventListener("click", mothod); } }); } } class Watcher { constructor(node, attr, data, property) { this.node = node; this.attr = attr; this.data = data; this.property = property; } update() { this.node[this.attr] = this.data[this.property]; } } // 渲染todolist列表 const Render = { // 初始化 init: function (arr) { const fragment = document.createDocumentFragment(); for (let i = 0; i < arr.length ; i++) { const li = document.createElement("li"); li.textContent = arr[i]; fragment.appendChild(li); } list.appendChild(fragment); }, addList: function (val) { const li = document.createElement("li"); li.textContent = val; list.appendChild(li); } }; // 实例化一个proxyVue window.onload = function () { let vm = new proxyVue({ el: "#app", data: { num: 0, arr: [] }, methods: { addList() { this.arr.push(this.num); // Render.addList(this.num); } } }); }; </script> </ html > |
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