案例一：HTML元素的v-model -输入框(text)
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>v-model指令</title> <script src="https://cdn.bootcss.com/vue/2.3.4/vue.js"></script> </head> <body> <div> {{price}}<br> <input v-model="price"><!-- 下行注释的语法糖 --> <!-- <input :value="price" @input="price = $event.target.value"> --> </div> <script> new Vue({ el: '#app4', data: { price: '20' } }); </script> </body> </html>
案例二： 定制组件的v-model - 输入框(text)
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>v-model指令</title> <script src="https://cdn.bootcss.com/vue/2.3.4/vue.js"></script> </head> <body> <div> {{price}} <my-input v-model="price"></my-input><!-- 下行注释的语法糖 --> <!-- <my-input :value="price" @input="val => {price = val}"></my-input> --> </div> <script> Vue.component('my-input', { template: '<div></span><input type="text" ref="input" :value="value" @input="doThis"/></div>', props: { value: String }, methods: { doThis() { this.$emit('input', this.$refs.input.value); } } }); new Vue({ el: '#app3', data: { price: '10' } }); </script> </body> </html>
案例三： 定制组件的v-model - 复选框(checkbox) - 2.2.0 新增
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>v-model指令</title> <script src="https://cdn.bootcss.com/vue/2.3.4/vue.js"></script> </head> <body> <div> {{fruit}}<!-- 观测数据变化 --> <my-checkbox v-model="fruit.apple" value="apple"></my-checkbox><!-- 下行注释的语法糖 --> <!-- <my-checkbox :checked="fruit.apple" @change="val => {fruit.apple = val}" value="apple"></my-checkbox> --> <my-checkbox v-model="fruit.peach" value="peach"></my-checkbox><!-- 下行注释的语法糖 --> <!-- <my-checkbox :checked="fruit.peach" @change="val => {fruit.peach = val}" value="peach"></my-checkbox> --> </div> <script> Vue.component('my-checkbox', { template: '<div><span>{{value}}</span><input type="checkbox" :checked="checked" @change="doThis" :value="value"/></div>', model: { prop: 'checked', event: 'change' }, props: { checked: Boolean, value: String }, methods: { doThis() { this.$emit('change', !this.checked); } } }); new Vue({ el: '#app2', data: { fruit: {//数据 apple: true, peach: false } } }); </script> </body> </html>
案例四： 定制组件的v-model - 单选按钮(radio) -2.2.0 新增
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>v-model指令</title> <script src="https://cdn.bootcss.com/vue/2.3.4/vue.js"></script> </head> <body> <div> {{fruit}}<!-- 观测数据变化 --> <my-radio v-model="fruit" value="apple"></my-radio><!-- 下行注释的语法糖 --> <!-- <my-radio :checked="fruit" @change="val => {fruit = val}" value="apple"></my-radio> --> <my-radio v-model="fruit" value="peach"></my-radio><!-- 下行注释的语法糖 --> <!-- <my-radio :checked="fruit" @change="val => {fruit = val}" value="peach"></my-radio> --> </div> <script> Vue.component('my-radio', { template: '<div><span>{{value}}</span><input :name="name" type="radio" ref="radio" :checked="checked===value" @change="doThis" :value="value"/></div>', model: { prop: 'checked', event: 'change' }, props: { checked: String, value: String, name: String }, methods: { doThis() { this.$emit('change', this.$refs.radio.value); } } }); new Vue({ el: '#app', data: { fruit: 'peach'//数据 } }); </script> </body> </html>