vue中v-model的多種使用場景
阿新 • • 發佈:2018-11-02
案例一:HTML元素的v-model -輸入框(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 id="app4"> {{price}}<br> <input v-model="price"><!-- 下行註釋的語法糖 --> <!-- <input :value="price" @input="price = $event.target.value"> --> </div> <script> new Vue({ el: '#app4', data: { price: '20' } }); </script> </body> </html>
案例二: 定製元件的v-model - 輸入框(text)
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>v-model指令</title> <script src="https://cdn.bootcss.com/vue/2.3.4/vue.js"></script> </head> <body> <div id="app3"> {{price}} <my-input v-model="price"></my-input><!-- 下行註釋的語法糖 --> <!-- <my-input :value="price" @input="val => {price = val}"></my-input> --> </div> <script> Vue.component('my-input', { template: '<div></span><input type="text" ref="input" :value="value" @input="doThis"/></div>', props: { value: String }, methods: { doThis() { this.$emit('input', this.$refs.input.value); } } }); new Vue({ el: '#app3', data: { price: '10' } }); </script> </body> </html>
案例三: 定製元件的v-model - 複選框(checkbox) - 2.2.0 新增
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>v-model指令</title> <script src="https://cdn.bootcss.com/vue/2.3.4/vue.js"></script> </head> <body> <div id="app2"> {{fruit}}<!-- 觀測資料變化 --> <my-checkbox v-model="fruit.apple" value="apple"></my-checkbox><!-- 下行註釋的語法糖 --> <!-- <my-checkbox :checked="fruit.apple" @change="val => {fruit.apple = val}" value="apple"></my-checkbox> --> <my-checkbox v-model="fruit.peach" value="peach"></my-checkbox><!-- 下行註釋的語法糖 --> <!-- <my-checkbox :checked="fruit.peach" @change="val => {fruit.peach = val}" value="peach"></my-checkbox> --> </div> <script> Vue.component('my-checkbox', { template: '<div><span>{{value}}</span><input type="checkbox" :checked="checked" @change="doThis" :value="value"/></div>', model: { prop: 'checked', event: 'change' }, props: { checked: Boolean, value: String }, methods: { doThis() { this.$emit('change', !this.checked); } } }); new Vue({ el: '#app2', data: { fruit: {//資料 apple: true, peach: false } } }); </script> </body> </html>
案例四: 定製元件的v-model - 單選按鈕(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 id="app">
{{fruit}}<!-- 觀測資料變化 -->
<my-radio v-model="fruit" value="apple" name="myFruit"></my-radio><!-- 下行註釋的語法糖 -->
<!-- <my-radio :checked="fruit" @change="val => {fruit = val}" value="apple"></my-radio> -->
<my-radio v-model="fruit" value="peach" name="myFruit"></my-radio><!-- 下行註釋的語法糖 -->
<!-- <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'//資料
}
});
</script>
</body>