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Anti shake and throttling

2022-07-29 00:29:00 【qiansli12138】

This knowledge point is suddenly used in today's work , Just record it .

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title></title>
    <style type="text/css">
      #box {
        width: 200px;
        height: 200px;
        background-color: pink;
      }
    </style>
  </head>
  <body>
    <div id="box">
      22232
    </div>
    <!--  Woman <input type="radio" name="2" id="clickRadio" value="" /> -->
       <!--  Anti shake strategy （debounce） When the event is triggered , Delay n Seconds before the callback , If in this n The second event is triggered again , Then the time will be counted again . -->
      <script type="text/javascript">
        //  Shake proof  :  Anti shake is when the event is triggered continuously , Ensure that only the last event handler is executed 
        function debounce (fn) {
          var timer = null
          return function (){
            clearTimeout(timer) //  Delete the previous timer every time you click   It is equivalent to clearing the last event 
            timer = setTimeout(() => {
              fn()
            },1000)
          }
        }
        function sayHi () {
          console.log(" Triggered the jitter for the last time ")
        }
        let box = document.querySelector("#box")
        box.addEventListener("click", debounce(sayHi))
        //  throttle ：  When the event is triggered continuously , Make sure to call the event handler only once in a certain period of time 
        function throttle (fn) {
          var flag = true
          return function () {
            if (!flag) return // flag by false Don't go down 
            flag = false //  Now flag Set to false
            setTimeout(() => {
              fn()
              flag = true //  When the user handler succeeds, it will flag The assignment is TRUE, You can click again 
            },1000)
          } 
        }
        function flagFunction (){
          console.log("777")
        }
        //let box = document.querySelector("#box")
        //box.addEventListener("click", throttle(flagFunction))
        
      </script>
  </body>
</html>

summary ： Shake proof ： In unit time , Only execute the last click event ;

            throttle ： In unit time , Multiple click events , The next operation will not be executed until the execution is completed .

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版权声明
本文为[qiansli12138]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/196/202207130557364784.html

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