vue implements verification code countdown function

This time I will bring you vue implementationVerification codeCountdown function, what are the precautions for vue to implement the verification code countdown function, the following is a practical case , let’s take a look.

I searched online and tried their code, but I encountered many problems. Therefore, it is necessary to write a basic introductory article to avoid pitfalls for others later.

This is written in js according to the HTML page written online

<p class="register-pannel" id ="register-pannel"> 
      <p class="register-l" align="center"> 
        <p class="input-group" style="width: 300px;"> 
          <input type="text" class="form-control" placeholder="邮箱/手机号/用户名" style="height: 40px;" /> 
          <span class="glyphicon glyphicon-user form-control-feedback" aria-hidden="true" /> 
        </p> 
        <br /> 
        <p class="input-group" style="width: 300px;"> 
          <input type="text" class="form-control" placeholder="密码" style="height: 40px;" /> 
          <span class="glyphicon glyphicon-lock form-control-feedback" /> 
        </p> 
        <br /> 
        <p class="input-group" style="width: 300px;"> 
          <input type="text" class="form-control" placeholder="手机号" style="height: 40px;" /> 
          <span class="glyphicon glyphicon-phone form-control-feedback" /> 
        </p> 
        <br /> 
        <p class="input-group" style="width: 300px;"> 
            <span class="register-msg-btn" v-show="show" v-on:click="getCode">发送验证码</span> 
            <span class="register-msg-btn" v-show="!show">{{count}} s</span> 
          <input type="text" class="form-control" placeholder="验证码" style="float: right; height: 40px; width: 150px;" /> 
          <span class="glyphicon glyphicon-font form-control-feedback" /> 
        </p> 
        <br /> 
        <span class="btn-register">注册</span> 
      </p>

<script> 
<span style="white-space: pre;">      </span>data(){   
<span style="white-space: pre;">      </span>return {   
<span style="white-space: pre;">        </span>show: true,   
<span style="white-space: pre;">        </span>count: '',   
<span style="white-space: pre;">        </span>timer: null,   
<span style="white-space: pre;">      </span>}  
<span style="white-space: pre;">    </span>},  
<span style="white-space: pre;">    </span>methods:{   
<span style="white-space: pre;">      </span>getCode(){    
<span style="white-space: pre;">        </span>const TIME_COUNT = 60;    
<span style="white-space: pre;">        </span>if (!this.timer) {     
<span style="white-space: pre;">          </span>this.count = TIME_COUNT;     
<span style="white-space: pre;">          </span>this.show = false;     
<span style="white-space: pre;">          </span>this.timer = setInterval(() => {     
<span style="white-space: pre;">            </span>if (this.count > 0 && this.count <= TIME_COUNT) {      
<span style="white-space: pre;">              </span>this.count--;      
<span style="white-space: pre;">            </span>} else {      
<span style="white-space: pre;">              </span>this.show = true;      
<span style="white-space: pre;">              </span>clearInterval(this.timer);      
<span style="white-space: pre;">              </span>this.timer = null;      
<span style="white-space: pre;">            </span>}     
<span style="white-space: pre;">          </span>}, 1000)     
<span style="white-space: pre;">        </span>}   
<span style="white-space: pre;">      </span>}   
<span style="white-space: pre;">    </span>} 
</script>

I found that the browser keeps reporting errorsUncaught SyntaxError: Unexpected token {

So according to the format of the official document, change the js structure to

<script> 
    new Vue({ 
      el:'.register-pannel',      
      data:{    
        show:true,   
        timer:null, 
        count:'' 
      },  
      methods:{   
        getCode(){ 
          this.show = false; 
          const TIME_COUNT = 60;    
          if (!this.timer) {     
            this.count = TIME_COUNT;     
            this.show = false;     
            this.timer = setInterval(() => {     
              if (this.count > 0 && this.count <= TIME_COUNT) {      
                this.count--;      
              } else {      
                this.show = true;      
                clearInterval(this.timer);      
                this.timer = null;      
              }     
            }, 1000)     
          }   
        }   
      } 
    }); 
    </script>

Then the format is no problem, but the style does not take effect. It became something else.

I searched a lot on the Internet.

It is said that it is a problem with the order of jsquotes.

It is said that js is written into window.onload. I tried it and found that it was all wrong.

Later, the el attribute was discovered in the official documentation: providing a mounting element for the instance. The value can be a CSS selector, an actual HTML element, or a function that returns an HTML element.

So change it to

<script>
 new Vue({
  el:'.register-pannel', //注册p的class 
  data:{   
  show:true,  
  timer:null,
  count:''
  }, 
  methods:{  
  getCode(){
   this.show = false;
   const TIME_COUNT = 60;   
   if (!this.timer) {    
   this.count = TIME_COUNT;    
   this.show = false;    
   this.timer = setInterval(() => {    
    if (this.count > 0 && this.count <= TIME_COUNT) {     
    this.count--;     
    } else {     
    this.show = true;     
    clearInterval(this.timer);     
    this.timer = null;     
    }    
   }, 1000)    
   }  
  }  
  }
 });
</script>

and the effect will come out.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

Detailed explanation of the steps to install npm in vue.js

How to deal with the 302 status code when axios appears

The above is the detailed content of vue implements verification code countdown function. For more information, please follow other related articles on the PHP Chinese website!