html-formatter

Format/Beautify HTML the right way, giving you full control!

Designed specially for heavy attribute HTML like Angular.

Features

Choose your indentation (tabs, spaces or any other stupid character)
Indent and vertical align comments and text nodes
Sort, inline and vertical align attributes
After formatting your code, your diff will be very readable.

CLI

Usage: html-formatter [Options] files
  files are globbed

Options:
  --config   configuration file                [default: ".html-formatter.json"]
  --check    Check if given files are already formatted[boolean] [default: true]
  --write    Format files in-place                    [boolean] [default: false]
  --verbose  Format files in-place                    [boolean] [default: false]
  --help     Show help                                                 [boolean]

html-formatter --config ./.html-formmatter.json --write ./**/*.hmtl

.html-formatter.json

This file contains the configuration used by the cli.

Here I leave my Angular 2 config as an example:

{
  "attributes": {
    "order": {
      "*": [
        "*ngIf",
        "*ngFor",

        "id",
        "class",
        "/\\[class.*/",
        "style",
        "/\\[style.*/",

        "type",
        "name",
        "[name]",
        "value",
        "[value]",

        "size",
        "label",
        "placeholder",
        "[placeholder]",
        "[(ngModel)]",
        "checked",
        "[checked]",
        "required",
        "[required]",
        "disabled",
        "[disabled]",

        "href",
        "[routerLink]",
        "routerLinkActive",

        "src",
        "target",

        "alt",
        "title",

        "role",
        "for",
        "[for]",

        "/^\\(.*\\)$/",
        "/aria.*/",
        "/data.*/",
        "/\\#.*/"
      ]
    },
    "inline": {
      "id": ["class"],
      "alt": ["title"]
    },
    "ignoreCount": [],
    "forceEmpty": []
  },
  "newlineAfter": [],
  "newlineEOF": true
}

API

var formatter = require('../');
// set: formatter.options

const filename = path.join(__dirname, 'my-html-file.html');

formatter.formatFile(
  filename, {
}, function(err, text) {
  require('fs').writeFileSync(filename, text);
  t.end();
});

options.attributes.order[]

Object that contains how to sort attributes. The keys are the tagName of the HTML tag. The values are arrays of string/regex to match against attributes.

The key * will be applied to every tag.

Example:

var formatter = require('../');
formatter.options.attributes.order['*'] = [
  "class",
  /^\[class.*/,
  "style",
  /^\[style.*/,
  "*ngIf",
  "*ngFor",
  /^\(*/,
];

formatter.options.attributes.order['input'] = [
  "type",
  "name",
  "placeholder"
];

formatter.options.attributes.forceEmpty

Some attributes could be empty in HTML, not in XHTML. We use a strict parser and if you want to remove that conversion it's ok...

formatter.options.attributes.forceEmpty = ['xxx'];

options.attributes.inline

Object wich key are the attribute that will appear first in the line.

NOTE: This may need to be used in conjuction with ignoreCount to fully inline a tag.

Example:

formatter.options.attributes.inline = { "auth": ["resource"] };
formatter.options.attributes.ignoreCount = ["resource"];

Input:

<div
  auth="user"
  resource="add-user"
  disable="form.invalid">xxx</div>

<div
  auth="user" resource="add-user"
  disable="form.invalid">xxx</div>

options.attributes.ignoreCount

List of attributes names that won't count as an attributes. This allow to inline two or more attributes.

Input:

<div class="row" style="width: 100px"></div>

Without ignoreCount

<div
    class="row"
    style="width: 100px">
    </div>

With ignoreCount (class or style)

<div class="row" style="width: 100px"></div>

formatter.options.newlineAfter

List of tag names. When closing the tag it will add a new line.

formatter.options.newlineAfter = ['container', 'hr'];

formatter.options.newlineEOF

Add a new line at the end of the file.

formatter.options.newlineEOF = true;

Developer notes

To parse HTML I used isaacs/sax-js (1.2.2) but I have to include it in the project directly because Angular templates aren't XML compilant.

License

MIT

llafuente/html-formatter