我想要获取时区为“Europe/London”的当前小时（例如，如果时间是13:45，则获取`13`），无论用户的时区如何。
它只需要在现代浏览器中运行，如果用户的浏览器不支持此时区，那也没关系 - 这只是一种渐进式增强，如果失败，我可以包裹在`try`/`catch`中并不执行任何操作。
以下是我能想到的最佳方法。
```javascript
const timeZone = "Europe/London"
const dateTimeFormat = new Intl.DateTimeFormat("en-GB", { timeZone, hour: "numeric" })
const hour = parseInt(dateTimeFormat.formatToParts(new Date)[0].value, 10)

<details>
<summary>英文:</summary>
I want to get the current hour (e.g. `13` if the time is 13:45) in the time zone &quot;Europe/London&quot;, no matter the user&#39;s own time zone.
It only needs to work in modern browsers, and it&#39;s fine if the user&#39;s browser doesn&#39;t happen to handle this time zone – it&#39;s for a bit of progressive enhancement where I&#39;m fine wrapping it in a `try`/`catch` and doing nothing if it fails.
The following was the best I could come up with.
``` javascript
const timeZone = &quot;Europe/London&quot;
const dateTimeFormat = new Intl.DateTimeFormat(&quot;en-GB&quot;, { timeZone, hour: &quot;numeric&quot; })
const hour = parseInt(dateTimeFormat.formatToParts(new Date)[0].value, 10)

const hour = new Date().toLocaleString("en-GB", { timeZone: "Europe/London", hour: "numeric" });
console.log(hour);