<div>{{message}}</div>
<ul>
<li></li>
</ul>
{{message}}
</div>
<script>
let vm = new MVVM({
el: '#app',
data: {
message: 'Hello Vue.js!'
}
})
</script>
</body>
</html>
mvvm.js
class MVVM {
constructor(options) {
this.$el = options.el;
this.$data = options.data; if (this.$el) {
new Compile(this.$el);
}
}
}
compile把dom节点，放在内存中操作(到35分钟)
class Compile {
constructor(el, vm) {
this.el = this.isElementNode(el) ? el : document.querySelector(el);
this.vm = vm;
if (this.el) {
let fragment = this.node2frament(this.el);
this.compile(fragment);
}
} //辅助方法
isElementNode(node) {
return node.nodeType === 1;
}
//核心方法
compile(fragment) {
let childNodes = fragment.childNodes;
console.log(childNodes)
}
node2frament(el) {
let fragment = document.createDocumentFragment();
let firstChild;
while (firstChild = el.firstChild) {
fragment.appendChild(firstChild);
}
return fragment
}
}
分类元素节点和文本节点(52分钟)
class Compile {
constructor(el, vm) {
this.el = this.isElementNode(el) ? el : document.querySelector(el);
this.vm = vm;
if (this.el) {
let fragment = this.node2frament(this.el);
this.compile(fragment);
}
} //辅助方法
isElementNode(node) {
return node.nodeType === 1;
}
isDirective(name) {
return name.includes('v-')
}
//核心方法
compileElement(node) {
let attrs = node.attributes;
Array.from(attrs).forEach(arrt => {
let attrName = attr.name;
if (this.isDirective(attrName)) {
let expr = attr.value;
}
})
}
compileText(node) {
let text = node.textContent;
let reg = /{{([^}]+)}}/g;
if (reg.test(text)) {
}
}
compile(fragment) {
let childNodes = fragment.childNodes;
Array.from(childNodes).forEach(node => {
if (this.isElementNode(node)) {
this.compile(node)
} else {
console.log('text', node)
}
})
}
node2frament(el) {
let fragment = document.createDocumentFragment();
let firstChild;
while (firstChild = el.firstChild) {
fragment.appendChild(firstChild);
}
return fragment
