Use JavaScript and CSS to implement the countdown function of inputting minutes and seconds

This article mainly introduces the code implementation of JavaScript input minute and second countdown. It shows the logical process through css and js code. You can check the detailed explanation below for the specific operation steps. Interested friends can refer to it.

The code is as follows:

<p class="container-fluid"> 
 <p class="main-content-inner"> 
 <p class="page-content">
  <p class="page-header"> 
  <form class="form-inline" id="searchform"> 
  <p class="form-group" style="margin-left: 10px;">
   <label>分</label> 
  <input type="text" class="form-control" name="Minute" id="Minute">
   </p> 
  <p class="form-group" style="margin-left: 10px;"> 
  <label>秒</label> 
  <input type="text" class="form-control" name="Second" id="Second">
   </p>
  <button type="button" class="btn btn-purple btn-sm" onclick="ok()"> 开始 </button> 
  </form>
  </p>
  <p class="row" style="height:500px;line-height:500px;vertical-align:middle;font-size:200px;color:red;text-align:center;margin-top:100px"> <p id="listview"></p> 
  </p> 
 </p>
  </p> 
 </p>

 <script>
  var t;
  var Minute;
  var Second; 
  var d;
  function ok() {
   if ($("#Minute").val() == "0" || $("#Minute").val() == "") {
   Minute = 0;
   } else {
   Minute = $("#Minute").val();
   }
   if ($("#Second").val() == "0" || $("#Second").val() == "") {
   Second = 0;
   } else {
   Second = $("#Second").val();
   }
  var min = "";
  if (Minute < 10) {
   min = "0" + Minute;
  } else {
   min = Minute + "";
  }
  var sec = "";
  if (Second < 10) {
   sec = "0" + Second;
  } else {
   sec = Second + "";
  }
  $("#listview").text(min + ":" + sec);
  $(".page-header").hide();
  $("#listview").show();
  setTimeout(function () {
   begin()
  }, 1000);  
  }
  function begin() {  
  if (Second != 0) {
   Second--;
   min = "";
   if (Minute < 10) {
   min = "0" + Minute;
   } else {
   min = Minute + "";
   }
   sec = "";
   if (Second < 10) {
   sec = "0" + Second;
   } else {
   sec = Second + "";
   }
   $("#listview").text(min + ":" + sec);
  } else {
   if (Minute > 0) {
   Minute--;
   Second = 59;
   min = "";
   if (Minute < 10) {
    min = "0" + Minute;
   } else {
    min = Minute + "";
   }
   sec = "";
   if (Second < 10) {
    sec = "0" + Second;
   } else {
    sec = Second + "";
   }
   $("#listview").text(min + ":" + sec);
   } else {
   clearTimeout(t);
   }
  }
  t = setTimeout(function () {
   begin()
  }, 1000)
  }
 </script>

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