javascript 如何模拟浏览器的时区？
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How to mock the browser's timezone?
提问by McSas
I want to test a location feature in a web site, to make this test I need to try different time-zones. I obtain the timezone with a javascript code, calling the following function:
我想测试网站中的位置功能，为了进行此测试，我需要尝试不同的时区。我使用 javascript 代码获取时区，调用以下函数：
var offset = new Date().getTimezoneOffset();
Now this function returns to me 180 because I am in Argentina, I need to test with different time-zones. Somebody knows how to do this? Many thanks!!
现在这个函数返回给我 180 因为我在阿根廷，我需要用不同的时区进行测试。有人知道怎么做吗？非常感谢！！
回答by JC Brand
The accepted answer doesn't really mock the Date.getTimezoneOffsetmethod, instead it expects you to use a different method with the same name.
接受的答案并没有真正嘲笑该Date.getTimezoneOffset方法，而是希望您使用具有相同名称的不同方法。
It won't work on Date objects themselves and as Carl Meyer points out, it won't work for libraries like MomentJS.
它不适用于 Date 对象本身，正如 Carl Meyer 指出的那样，它不适用于像 MomentJS 这样的库。
A better way is to override the getTimezoneOffsetmethod on the Dateprototype, so that all instances of Datehave the overridden method.
更好的方法是覆盖原型getTimezoneOffset上的方法Date，以便所有实例都Date具有覆盖的方法。
d = new Date(); // Mon Jul 13 2015 10:58:12 GMT+0200 (CEST)
alert(d.getTimezoneOffset()); // -120, My local "real" timezone.
// Save the original method.
var getTimezoneOffset = Date.prototype.getTimezoneOffset;
Date.prototype.getTimezoneOffset = function () {
return 160;
}
// Now Date objects will have the mocked timezone offset
alert(d.getTimezoneOffset()); // 160, The mocked timezone.
// Now restore the method to its original version
Date.prototype.getTimezoneOffset = getTimezoneOffset;
alert(d.getTimezoneOffset()); // -120
回答by Brendan
You could use a function for this.
您可以为此使用一个函数。
function getTimezoneOffset() {
if (DEBUG) {
return 600; // for Australian Eastern Standard Time
}
return new Date().getTimezoneOffset();
}
Where DEBUGis a variable set earlier on to determine whether you're testing or not.
DEBUG先前设置的变量在哪里确定您是否正在测试。
Then use that function throughout your code, instead of the method on the Date object.
然后在整个代码中使用该函数，而不是 Date 对象上的方法。
