如何将 HH:mm:ss 字符串转换为 Javascript Date 对象？
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How to convert a HH:mm:ss string to to a Javascript Date object?
提问by Yosef
I have dynamic string with a HH:mm:ssformat (e.g. 18:19:02). How can the string be converted into a Javascript Date object (in IE8, Chrome, and Firefox)?
我有一个HH:mm:ss格式的动态字符串（例如18:19:02）。如何将字符串转换为 Javascript 日期对象（在 IE8、Chrome 和 Firefox 中）？
I tried the following:
我尝试了以下方法：
var d = Date.parse("18:19:02");
document.write(d.getMinutes() + ":" + d.getSeconds());
回答by Christoph
You cannot create a Date Object directly just from a time like HH:mm:ss.
您不能仅从像HH:mm:ss.
However - assuming you want the actual date(day) or it doesn't matter for your case - you could do the following:
但是 - 假设您想要实际日期（天）或者对您的情况无关紧要 - 您可以执行以下操作：
let d = new Date(); // creates a Date Object using the clients current time
let [hours,minutes,seconds] = "18:19:02".split(':'); // using ES6 destructuring
// var time = "18:19:02".split(':'); // "old" ES5 version
d.setHours(+hours); // set the hours, using implicit type coercion
d.setMinutes(minutes); // you can pass Number or String, it doesn't really matter
d.setSeconds(seconds);
// if needed, adjust date and time zone
console.log(d.toString()); // outputs your desired time (+current day and timezone)Now you have a Date object which contains the time you specified + the current date and timezone of your client.
现在您有一个 Date 对象，其中包含您指定的时间 + 客户端的当前日期和时区。
回答by silly
try this (without jquery and date object (its only a time))
试试这个（没有 jquery 和 date 对象（它只是一次））
var
pieces = "8:19:02".split(':')
hour, minute, second;
if(pieces.length === 3) {
hour = parseInt(pieces[0], 10);
minute = parseInt(pieces[1], 10);
second = parseInt(pieces[2], 10);
}
回答by Anders H.
Perhaps the Date object is never properly set because of missing date. This should work:
也许由于缺少日期，Date 对象从未正确设置。这应该有效：
var d = new Date("1970-01-01 18:19:02");
document.write(d.getMinutes() + ":" + d.getSeconds());
