JavaScript method to obtain elements through Chinese id and class

I used to think that id and class in html elements could only be named by special characters such as letters, numbers or underscores. If you use a Chinese browser for single storage, no error will be reported, but js cannot be obtained. However, when I visited the forum today Found this not to be the case.

The code is as follows:

Run result:

The forum source is this:

Forum link

The question requirements are as follows:

The forum master’s answer is as follows:

**var item = arr[i].split('：'),o;
(o = document.getElementById(item[0])) && (o.value = item[1]);**
Seeing these two lines, I found that item[0] should get the Chinese id, document.getElementById (item[0]) is the element that obtains the Chinese ID. After running, it was found that it can be obtained. This time I gained knowledge again.

**

Reminder: Although js can obtain Chinese IDs, it is not recommended to use Chinese as ID or class naming. After all, every development must follow development specifications.

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