Rules for HTML Linting

[gaurav21r]

@riteshe63 as you had mentioned in #4 I agree https://github.com/yaniswang/HTMLHint seems to be the best.

It seems to be quite difficult to find default configurations for HTML as compared to the variety of options in JS #6 .

With the advent of HTML Web Components and projects focused on HTML its quite surprising none of the big ones use an .htmlhintrc.

Maybe no one just cares how HTML is linted? :(

Tracking info from HTMLHint themselves here htmlhint/HTMLHint#112
Tracking request to Polymer here Polymer/polymer#3490
Tracking request to HTML5 Boilerplate here h5bp/html5-boilerplate#1801

cc @prakash1517 @riteshe63 @nitinmadeshia

[gaurav21r]

@riteshe63 Please use the following rules for the time being:

{
  "tagname-lowercase": true,
  "attr-lowercase": true,
  "attr-value-double-quotes": true,
  "doctype-first": true,
  "tag-pair": true,
  "spec-char-escape": true,
  "id-unique": true,
  "src-not-empty": true,
  "attr-no-duplication": true,
  "title-require": true,
  "tag-self-close": true,
  "alt-require": true,
  "doctype-html5": true,
  "space-tab-mixed-disabled": "space",
  "id-class-ad-disabled": true,
  "attr-unsafe-chars": true
}

There are still more things to be done:

1. Make an htmlhintrc based on HTML5Bootstrap
2. Make htmlhint lint indentation errors.

We need to open separate issues for both of these. Lets not close this until we've opened those.

[riteshe63]

#28
Solve this issue

[gaurav21r]

We've got positive response for the h5bp team h5bp/html5-boilerplate#1801 (comment)

@divya3103 We should now open a PR there and continue with this issue.