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| class Vue { constructor(option) { this.el = option.el && document.querySelector(option.el); this.$data = option.data; this.$methods = option.methods; this.init(); } init() { this.observer(this.$data); new Compile(this.el, this); } observer(daObj) { if(typeof daObj === 'object') { for(let key in daObj) { let value = daObj[key]; if(value && typeof value === 'object') { this.observer(value); }else { let dep = new Dep(); Object.defineProperty(daObj, key, { get() { Dep.target && dep.push(Dep.target); return value; }, set(val) { value = val; dep.dispatch(); } }); } } } } }
class Dep { constructor() { this.watchers = []; } push(watcher) { this.watchers.push(watcher); } dispatch() { this.watchers.forEach(watcher=> { watcher && watcher.callback && watcher.callback(); }); } }
class Watcher { constructor(callback) { Dep.target = this; this.callback = callback; } }
class Compile { constructor(el, vm) { this.parseHtml(el, vm); } parseHtml(el, vm) { Array.from(el.childNodes).forEach(item=> { this.updateDirect(item, vm); if(item.nodeType === 1 && item.childNodes.length>0) { this.parseHtml(item, vm); }else if(item.nodeType === 3 && /\{\{(.*)\}\}/.test(item.textContent)) { let epx = RegExp.$1; this.updateText(item, vm, epx); new Watcher(()=> { this.updateText(item, vm, epx); }); eval('vm.$data.' + epx); Dep.target = null; } }); } updateDirect(node, vm) { if(typeof node.attributes === 'object') { let attrs = Array.from(node.attributes); if(attrs.length > 0) { for(let i=0; i<attrs.length; i++) { if(/^v\-.+/.test(attrs[i].name)) { let handleStr = attrs[i].name.substring(2); let epx = attrs[i].value; this['dir'+handleStr](node, vm, epx); } if(/^\@.+/.test(attrs[i].name)){ let eventName = attrs[i].name.substring(1); let callbackName = attrs[i].value; this['eventHandler'](node, vm, eventName, callbackName); } } } } } dirtext(node, vm, epx) { this.updateText(node, vm, epx); new Watcher(()=> { this.updateText(node, vm, epx); }); eval('vm.$data.' + epx); Dep.target = null; } dirhtml(node, vm, epx) { this.updateHtml(node, vm, epx); new Watcher(()=> { this.updateHtml(node, vm, epx); }); eval('vm.$data.' + epx); Dep.target = null; } dirmodel(node, vm, epx) { this.updateValue(node, vm, epx); new Watcher(()=> { this.updateValue(node, vm, epx); }); eval('vm.$data.' + epx); Dep.target = null; node.addEventListener('input', (ev)=> { eval('vm.$data.' + epx + '="' + ev.target.value + '"'); }, false); } eventHandler(node, vm, eventName, callbackName) { node.addEventListener(eventName, vm.$methods[callbackName]||loop, false); } updateText(node, vm, epx) { node.textContent = eval('vm.$data.'+epx); } updateHtml(node, vm, epx) { node.innerHTML = eval('vm.$data.'+epx); } updateValue(node, vm, epx) { node.value = eval('vm.$data.'+epx); } } var loop = function() {}
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