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| <!DOCTYPE html> <html lang="en">
<head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title> vue 进阶系列之全局 API 的使用</title> <style> .todo-list { margin: 100px auto; width: 500px; text-align: center; font-family: '微软雅黑'; }
.display-item li{ text-align: left; padding-left: 1rem; color: #bbbbbb; }
.input-tod-item>input { width: 300px; height: 35px; border: 1px solid #bbb; border-radius: 4px; padding: 0 1rem; }
.input-tod-item>input:focus { border-radius: 4px; }
.input-tod-item>button { line-height: 35px; color: #ffffff; background-color: red; outline: none; opacity: .6; border-radius: 4px; border: none; padding: 0 1rem; cursor: pointer; }
.input-tod-item>button:hover { opacity: 1; }
.disableBtn { background-color: #bbb !important; opacity: 1 !important; }
.samll-widget { display: inline-block; height: 20px; width: 30px; line-height: 20px; text-align: center; color: #ffffff; transition: all 1s; border-radius: 2px; margin-left: 1rem; opacity: .5; cursor: pointer; }
.samll-widget:hover { opacity: 1; }
</style> </head>
<body> <div id="mount-point"> <div> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <script> const inputTpl = `<div class="input-tod-item"> <input v-focus type="text" v-model="inputValue"/> <button ref="addbtn" @click="addClick" :disabled="disableAddBtn" :class="{disableBtn: disableAddBtn}"> {{ add | capitalize}} </button> </div> ` const disTpl = `<div class="display-item"> <ul> <li v-for="(item, index) in disList" :key="index" :style="{textDecorationLine: item.isCompleted ? 'line-through' : 'none'}"> {{item.text}} <small-widget type="delete" index="index" @onClickWidget="deleteItem(index)"> <template v-slot:widget>x</template> </small-widget> <small-widget type="finished" index="index"> <template v-slot:widget>o</template> </small-widget> </li> </ul> </div>` const tpl = `<div class="todo-list"> <input-item @onAddItem="addItemToList"/> <display-item :disList="todoLists"/> </div>` /** global API * @Vue.compile(template) * 功能: 在 render 函数中编译模板字符串 * params: */ const widget = Vue.compile(`<span ref="small-widget" class="samll-widget" @click="handleClick"><slot name="widget"></slot></span>`) Vue.component('small-widget', { props: { type: { type: String }, index: { type: String } }, computed: { color () { if (this.type === 'delete') { return 'red' } else if (this.type === 'remind') { return 'yellow' } else { return 'green' } } }, mounted () { this.$refs['small-widget'].style.backgroundColor = this.color }, methods: { handleClick () { this.$emit('onClickWidget') } }, render: widget.render }) /** global API * @Vue.extend(options) * 功能: 使用基础 Vue 构造器,创建一个“子类” * params: 一个包含组件选项的对象。 */ const DisplayItem = Vue.extend({ template: disTpl, props: { disList: { type: Array } }, methods: { deleteItem(index) { this.$emit('onDeleteItem', index) } } }) /** global API * @Vue.component(id, [definition]) * 功能: 注册或获取全局组件 * params: {string} id, {Function | Object} [definition] */ Vue.component('display-item', DisplayItem) Vue.component('input-item', { template: inputTpl, data() { return { inputValue: '', add: 'add' } }, computed: { disableAddBtn() { return !this.inputValue } }, methods: { addClick() { console.log(this.disableAddBtn) if (this.disableAddBtn) return this.$emit('onAddItem', this.inputValue) } } }) Vue.component('todo-list', { render: function (createElement) { return createElement('div', {'class': {'todo-list': true}}, [ createElement('input-item', { on: { onAddItem: this.$parent.addItemToList }, }, this.$slots.default), createElement('display-item', { props: { disList: this.$parent.$data.todoLists }, on: { onDeleteItem: this.$parent.deleteItemFromList }, }, this.$slots.default), ]) } }) const TodoList = new Vue({ props: { data: { type: Object } }, data() { return { todoLists: [ { text: '这个周末去song' } ] } }, methods: { deleteItemFromList (index) { this.todoLists.splice(index, 1) } }, render: function (createElement) { return createElement('todo-list') } }) /** global API * @Vue.mixin(id, [definition]) * 功能: 定义一个全局混入 * params: {string} id {Function | Object} [definition] */ Vue.mixin({ created: function () { var myOption = this.$options.myOption console.log('[myOption]', myOption) } }) /** global API * @Vue.directive(id, [definition]) * 功能: 注册或获取一个全局指令 * params: {string} id {Function | Object} [definition] */ Vue.directive('focus', { inserted (el, binding, vNode) { el.focus() } }) /** global API * @Vue.vue(plugin) * 功能: 安装 Vue.js 插件 * params: {Object | Function} plugin */ Vue.use({ install(Vue) { let message = (context, options) => { let res = Vue.compile('<div>{{options.text}}</div>') let Message = Vue.extend({ render: res.render }) new Message().$mount(context) } Vue.prototype.$message = message } }) /** global API * @Vue.filter(id, [definition]) * 功能: 注册或获取全局过滤器。 * params: {string} id {Function | Object} [definition] */ Vue.filter('capitalize', function (value) { if (!value) return '' value = value.toString() return value.charAt(0).toUpperCase() + value.slice(1) }) /** global API * @Vue.set(target, propertyName/index, value ) * 功能: 向响应式对象中添加一个属性 * params: 一个包含组件选项的对象。 */ Vue.set(TodoList, 'key', { text: '这个周末去song' }) console.log(TodoList.$data) console.log(TodoList.$options) // => {components: {…}, directives: {…}, filters: {…}, _base: ƒ, template: "<div class="todo-list"><input-item @o…play-item :disList="todoLists"/>↵ </div>", …} console.log(TodoList.$el) console.log(TodoList.$root) console.log(TodoList.$props) console.log(TodoList.$parent) console.log(TodoList.$children) console.log(TodoList.$refs) console.log(TodoList.$scopedSlots) console.log(TodoList.$slots) console.log(TodoList.$listeners) console.log(TodoList.$attrs) console.log(TodoList.$isServer) let list = TodoList.$data.todoLists list = list.map(item => { TodoList.$set(item, 'isCompleted', true) return item }) TodoList.addItemToList = value => { list.push({ isCompleted: false, text: value }) TodoList.$data.todoLists = list } /** instance API (实例方法) * @vm.$mount(id, [definition]) * 功能: 挂载一个未挂载的实例 * params: {Element | string} [elementOrSelector] {boolean} [hydrating] */ TodoList.$mount('#mount-point') </script> </body>
</html>
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