You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
1.4 KiB
44 lines
1.4 KiB
4 years ago
|
has-unicode
|
||
|
|
===========
|
||
|
|
|
||
|
|
Try to guess if your terminal supports unicode
|
||
|
|
|
||
|
|
```javascript
|
||
|
|
var hasUnicode = require("has-unicode")
|
||
|
|
|
||
|
|
if (hasUnicode()) {
|
||
|
|
// the terminal probably has unicode support
|
||
|
|
}
|
||
|
|
```
|
||
|
|
```javascript
|
||
|
|
var hasUnicode = require("has-unicode").tryHarder
|
||
|
|
hasUnicode(function(unicodeSupported) {
|
||
|
|
if (unicodeSupported) {
|
||
|
|
// the terminal probably has unicode support
|
||
|
|
}
|
||
|
|
})
|
||
|
|
```
|
||
|
|
|
||
|
|
## Detecting Unicode
|
||
|
|
|
||
|
|
What we actually detect is UTF-8 support, as that's what Node itself supports.
|
||
|
|
If you have a UTF-16 locale then you won't be detected as unicode capable.
|
||
|
|
|
||
|
|
### Windows
|
||
|
|
|
||
|
|
Since at least Windows 7, `cmd` and `powershell` have been unicode capable,
|
||
|
|
but unfortunately even then it's not guaranteed. In many localizations it
|
||
|
|
still uses legacy code pages and there's no facility short of running
|
||
|
|
programs or linking C++ that will let us detect this. As such, we
|
||
|
|
report any Windows installation as NOT unicode capable, and recommend
|
||
|
|
that you encourage your users to override this via config.
|
||
|
|
|
||
|
|
### Unix Like Operating Systems
|
||
|
|
|
||
|
|
We look at the environment variables `LC_ALL`, `LC_CTYPE`, and `LANG` in
|
||
|
|
that order. For `LC_ALL` and `LANG`, it looks for `.UTF-8` in the value.
|
||
|
|
For `LC_CTYPE` it looks to see if the value is `UTF-8`. This is sufficient
|
||
|
|
for most POSIX systems. While locale data can be put in `/etc/locale.conf`
|
||
|
|
as well, AFAIK it's always copied into the environment.
|
||
|
|
|