如何以小时和分钟为单位增加30分钟的时间 [英] How to add 30 minutes to time as hours and minutes

问题描述

我有一个 time 变量，它是f.ex 5:21 .我想增加30分钟，然后无论结果如何，我都想增加30分钟.我该如何在javascript中执行此操作?
即.我要间隔30分钟.

I Have a time variable which is f.ex 5:21 . I want to add 30 minutes to it, then whatever result is, I want to add 30 minutes to it. How can I do this in javascript?
Ie. I want the interval of 30 min to the time I have.

var time = valgraph.datetime; // it's a dynamic time
var times = time.replace('Z', '');
var res = times.substr(11, 5); // time AS 5:20

推荐答案

尝试通过这种方式将分钟添加到您的时间字符串中.

Try this way to add minutes to your time string.

function addMinutesToTime(time, minsAdd) {
  function z(n){ 
     return (n<10? '0':'') + n;
    };
  var bits = time.split(':');
  var mins = bits[0]*60 + +bits[1] + +minsAdd;
  return z(mins%(24*60)/60 | 0) + ':' + z(mins%60);  
} 

result=addMinutesToTime('5:31',30);
alert(result);

请参见 FIDDLE

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