以完整格式显示时间计算

Question

我有一个小时间计算器，它减去24小时后的分钟数，例如然而，从13:30开始的22分钟等于13:08，而不是显示＆＃34; 13：08＆＃34;我的网页显示＆＃34; 13：8＆＃34;无论如何要让它显示＆＃34; 13： 0 8＆＃34;？

使用Javascript：

function myFunction() {

function converToMinutes(s) {
    var c = s.split(':');
    return parseInt(c[0]) * 60 + parseInt(c[1]);
}

function parseTime(s) {
    return Math.floor(parseInt(s) / 60) + ":" + parseInt(s) % 60
}


var endTime = document.getElementById("etime").value; 
var startTime = converToMinutes(document.getElementById("stime").value);
var converted = parseTime(startTime - endTime);


document.getElementById('finishtime').innerHTML = converted;

}

HTML：

<p>Please enter minutes</p>
<input type="text" id="etime">
<br>
<p>Please enter time in 24 hour format (eg. 15:00)</p>
<input type="text" id="stime">
<br>
<br>
<button onclick="myFunction()">Try it</button>

<p id="finishtime">

Answer 1

替换

return Math.floor(parseInt(s) / 60) + ":" + parseInt(s) % 60;

与

var seconds = parseInt(s) % 60;
return Math.floor(parseInt(s) / 60) + ":" + ((seconds < 10)?"0"+seconds:seconds);

Answer 2

＆＃13;

＆＃13;

function myFunction() {

function converToMinutes(s) {
    var c = s.split(':');
    return parseInt(c[0]) * 60 + parseInt(c[1]);
}

function parseTime(s) {
    return Math.floor(parseInt(s) / 60) + ":" + parseInt(s) % 60
}
  function parseTime2(s) {
    return Math.floor(parseInt(s) / 60) + ":0"+ parseInt(s) % 60
}


var endTime = document.getElementById("etime").value;
  
var startTime = converToMinutes(document.getElementById("stime").value);
 
  var a= (startTime - endTime)%60;
  var converted
  if(a>10){
 converted = parseTime(startTime - endTime);
  }
  else{
  converted = parseTime2(startTime - endTime);
  }


document.getElementById('finishtime').innerHTML = converted;

}

＆＃13;

<p>Please enter minutes</p>
<input type="text" id="etime">
<br>
<p>Please enter time in 24 hour format (eg. 15:00)</p>
<input type="text" id="stime">
<br>
<br>
<button onclick="myFunction()">Try it</button>

<p id="finishtime">

＆＃13;

＆＃13;

＆＃13;

Answer 3

function myFunction() {
	function converToMinutes(s) {
	  var c = s.split(':');
	  return parseInt(c[0]) * 60 + parseInt(c[1]);
	}
	function parseTime(s) {
	  var seconds = parseInt(s) % 60;
		return Math.floor(parseInt(s) / 60) + ":" + ((seconds < 10)?"0"+seconds:seconds);
	}
 	var endTime = document.getElementById("etime").value; 
	var startTime = converToMinutes(document.getElementById("stime").value);
	var converted = parseTime(startTime - endTime);
	document.getElementById('finishtime').innerHTML = converted;
}

<p>Please enter minutes</p>
<input type="text" id="etime" placeholder="Please enter minutes" value="22">
<br>
<p>Please enter time in 24 hour format (eg. 15:00)</p>
<input type="text" id="stime" placeholder="Please enter time formate (eg. 15:00)" value="13:30">
<br>
<br>
<button onclick="myFunction()">Try it</button>

<p id="finishtime"></p>