Summary of Vue.js form control operations

This article introduces you to the relevant knowledge of Vue.js form control operation. This article demonstrates the method of using v-model in input and textarea elements through examples. This article introduces you very well and has reference value. Friends who need it can refer to it

Concept Description

v-model command: Create two-way data binding on the 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

      
  
 
input 元素：
  
消息是: {{ message }}
 
textarea 元素：
 
{{ message2 }}
  
   

The effect is as shown in the figure:

Complex Check box

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

      
  
 
单个复选框：
  {{ checked }} 
多个复选框：
  Runoob  Google  taobao 
 选择的值为: {{ checkedNames }} 
   

The effect is as shown:

Radio button

##HTML

      
  
  Runoob 
  Google 
 选中值为: {{ picked }} 
   

drop-down list

HTML

      
  
  选择一个网站 Runoob Google  
 选择的网站是: {{selected}} 
 
   

##Modifier.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:

.number

If you want to automatically convert the user's input value to the Number type (if the conversion result of the original value is NaN, the original value will be returned), you can add a modifier number to v-model To handle input values:

This is often useful because input values in HTML will always be returned as string types when type="number".

If you want to automatically filter the first and last spaces input by the user, you can add the trim modifier to v-model to filter the input:

The above is what I compiled for everyone. I hope It will be helpful to everyone in the future.

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