Problem:
The Nu Html Checker (v.Nu) is useful HTML validator. It can be used not only from a web browser, but also from command line. But, this validator has some functional limitations (for both web interface and CLI version).
- v.Nu cannot handle non-Unicode files. For example, you will get errors like below for Shift_JIS files:
~/download/dist$ java -jar vnu.jar sjis.html "file:/home/satob/download/dist/sjis.html":11.40-11.40: error: Malformed byte sequence: “83”. "file:/home/satob/download/dist/sjis.html":11.42-11.42: error: Malformed byte sequence: “81”. "file:/home/satob/download/dist/sjis.html":11.44-11.44: error: Malformed byte sequence: “83”.
- v.Nu treats an HTML 4.01 doctype as obsolete doctype and shows an error:
~/download/dist$ java -jar vnu.jar html4.html "file:/home/satob/download/dist/index.html":1.1-3.44: info warning: Obsolete doctype. Expected “<!DOCTYPE html>”.
- Partial HTML (often used for Single Page Applications) gets error:
~/download/dist$ java -jar vnu.jar partial.html "file:/home/satob/download/dist/partial.html":1.1-1.19: error: Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
- Custom attributes (and tags) for JavaScript frameworks are treated as invalidate attribute:
~/download/dist$ java -jar vnu.jar angular.html "file:/home/satob/download/dist/angular.html":9.1-9.15: error: Attribute “ng-app” not allowed on element “div” at this point. "file:/home/satob/download/dist/angular.html":12.10-12.44: error: Attribute “ng-model” not allowed on element “input” at this point. "file:/home/satob/download/dist/angular.html":13.1-13.18: error: Attribute “ng-bind” not allowed on element “p” at this point.
In other words, v.Nu can handle only UTF-8 encoded, HTML5, full-length, and plain HTML.
Reason:
It seems by design.
Solution:
v.Nu doesn’t have options for these valid-depending-on-context HTML. There is no workaround for this problem, so use another HTML validator.
For example, The Eclipse built-in HTML validator can handle non-Unicode files, HTML 4.01, partial HTML, and has option for non-standard tags and attributes.
