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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/has-unicode/README.md | |
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diff --git a/node_modules/has-unicode/README.md b/node_modules/has-unicode/README.md new file mode 100644 index 0000000..5a03e59 --- /dev/null +++ b/node_modules/has-unicode/README.md @@ -0,0 +1,43 @@ +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. + |