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Detailed explanation of the steps to operate form controls with Vue.js
Detailed explanation of the steps to operate form controls with Vue.js
This time I will bring you a detailed explanation of the steps to operate the form control with Vue.js. What are the precautions for operating the form control with Vue.js? The following is a practical case, let's take a look.
Concept Description
v-model directive: Creates a two-way data binding on a form control element. v-model will automatically choose the correct method to update the element based on the control type.
Input box
The example demonstrates the use of v-model in the input and textarea elements to achieve bidirectionality Data binding:
HTML
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 测试实例</title>
<script src="https://cdn.bootcss.com/vue/2.2.2/vue.min.js"></script>
</head>
<body>
<p id="app">
<p>input 元素：</p>
<input v-model="message" placeholder="编辑我……">
<p>消息是: {{ message }}</p>
<p>textarea 元素：</p>
<p style="white-space: pre">{{ message2 }}</p>
<textarea v-model="message2" placeholder="多行文本输入……"></textarea>
</p>
<script>
new Vue({
el: '#app',
data: {
message: 'Runoob',
message2: '菜鸟教程\r\nhttp://www.runoob.com'
}
})
</script>
</body>
</html>##Checkbox
If the check box is a single one, it is a logical value. If there are multiple check boxes, it is bound to the same array:HTML
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 测试实例 </title>
<script src="https://cdn.bootcss.com/vue/2.2.2/vue.min.js"></script>
</head>
<body>
<p id="app">
<p>单个复选框：</p>
<input type="checkbox" id="checkbox" v-model="checked">
<label for="checkbox">{{ checked }}</label>
<p>多个复选框：</p>
<input type="checkbox" id="runoob" value="Runoob" v-model="checkedNames">
<label for="runoob">Runoob</label>
<input type="checkbox" id="google" value="Google" v-model="checkedNames">
<label for="google">Google</label>
<input type="checkbox" id="taobao" value="Taobao" v-model="checkedNames">
<label for="taobao">taobao</label>
<br>
<span>选择的值为: {{ checkedNames }}</span>
</p>
<script>
new Vue({
el: '#app',
data: {
checked : false,
checkedNames: []
}
})
</script>
</body>
</html>Radio button
##HTML<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 测试实例 </title>
<script src="https://cdn.bootcss.com/vue/2.2.2/vue.min.js"></script>
</head>
<body>
<p id="app">
<input type="radio" id="runoob" value="Runoob" v-model="picked">
<label for="runoob">Runoob</label>
<br>
<input type="radio" id="google" value="Google" v-model="picked">
<label for="google">Google</label>
<br>
<span>选中值为: {{ picked }}</span>
</p>
<script>
new Vue({
el: '#app',
data: {
picked : 'Runoob'
}
})
</script>
</body>
</html>
Drop-down list
HTML<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 测试实例</title>
<script src="https://cdn.bootcss.com/vue/2.2.2/vue.min.js"></script>
</head>
<body>
<p id="app">
<select v-model="selected" name="fruit">
<option value="">选择一个网站</option>
<option value="www.runoob.com">Runoob</option>
<option value="www.google.com">Google</option>
</select>
<p id="output">
选择的网站是: {{selected}}
</p>
</p>
<script>
new Vue({
el: '#app',
data: {
selected: ''
}
})
</script>
</body>
</html>
.lazy
By default, v-model synchronizes the value and data of the input box in the input event, but you can add a modifier lazy to switch to synchronization in the change event:<!-- 在 "change" 而不是 "input" 事件中更新 --> <input v-model.lazy="msg" >
<input v-model.number="age" type="number">
.trim
If you want to
automatically filter
<input v-model.trim="msg">
Detailed explanation of vue's method of packaging different domain names according to the environment's passing parameters
Vue converts the html string into Detailed explanation of HTML steps
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