{{prettify}} handlebars helper for formatting (beautifying) HTML, JavaScript and CSS.
This helper depends on and extends js-beautify. Please visit and star that project to show your support.
In the root of the project in which you plan to use the helper, in the command line run:
npm i prettify --saveUse within your application with the following line of JavaScript:
var helpers = require('prettify');Now your handlebars instance will have access to the {{prettify}} helper.
All options from js-beautify are available in this helper, as well as a few custom options that were specially created for this helper. The helper comes with some sensible defaults (in the humble opinion of the helper creator), but it's easy to customize them if you need to. Here are are two (convenient) ways to set options:
- options object: pass an options object to the helper as a parameter. E.g.
{{#prettify opts.obj}}. - options hash: this is an easy way to set options on the helper, and it also gives you granular control over how the helper renders content.
- Gruntfile: if you use both Grunt and Assemble, you can define options in the Assemble task options of your project's Gruntfile.
By design, options define here will override options defined anywhere else. This approach also provides granular control over options, allowing you to defined different options on multiple instances of the helper in the same file.
Example:
The helper can be used without Grunt or Assemble. But if you happen to use these two awesome tools you can define options for the helper in your Gruntfile in the prettify sub-options for Assemble:
grunt.initConfig({
assemble: {
options: {
prettify: {
mode: 'js', // 'html' is defined by default
condense: true,
padcomments: true,
indent: 4
}
},
...
}
});Options defined in the Assemble task can be viewed as custom "global" defaults, which can be overridden by options defined in the options hash.
The following options are passed to js-beautify. The defaults are shown for each option.
These options are available by default (see detailed HTML options):
{
"brace_style": "expand", // collapse|expand|end-expand
"indent-scripts": "normal", // keep|separate|normal
"indent_char": " ", // (default: space) Indentation character. Can be an actual tab or space
"indent_handlebars": false, // format and indent {{#foo}}...{{/foo}}
"indent_inner_html": false, // Indent <head> and <body> sections
"indent_size": 2, // Indentation size
"max_preserve_newlines": 5, // Maximum number of line-breaks to be preserved in one chunk
"preserve_newlines": true, // Preserve existing line-breaks
"unformatted": ["a", "sub", "sup", "b", "i", "u"], // List of tags that should not be reformatted (inline elements included by default)
"wrap_line_length": 78, // Maximum characters per line (0 disables this)
// custom options made for this helper
"indent": 2, // convenience alias for indent_size
"condense": false, // remove extra newlines missed by js-beautify.
"padcomments": false // add an extra newline above each HTML code comment
}When mode is set to js, the following options are available:
{
"brace_style": "collapse",
"break_chained_methods": false,
"eval_code": false,
"indent": 2,
"indent_char": " ",
"indent_level": 0,
"indent_size": 2,
"indent_with_tabs": false,
"jslint_happy": false,
"keep_array_indentation": false,
"keep_function_indentation": false,
"max_preserve_newlines": 10,
"preserve_newlines": true,
"space_before_conditional": true,
"unescape_strings": false,
"wrap_line_length": 0
}When mode is set to css, the following options are available:
{
"end_with_newline": false,
"indent": 2,
"indent_char": " ",
"indent_size": 2,
"selector_separator": ""
}Options created specially for this helper
Type: String
Default value: html (valid modes: html|js|css)
Only necessary if you want to format CSS or JavaScript (e.g. you must specify either js or css respectively). Example:
Assemble options:
assemble: {
options: {
prettify: {
// options for default 'html' mode go here
js: {
// options for 'js' mode go here
},
css: {
// options for 'css' mode go here
}
}
}
}Alias for indent_size.
Type: Number
Default value: 2
Number of spaces or tabs to indent the generated code. This option is an alias for indent_size.
Type: Boolean
Default value: true
Removes extra newlines and retains indenting:
Type: Boolean
Default value: True
Add a newline above each code comment:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<!-- code comment -->
<h1>My Blog</h1>
<h2>Post of the day</h2>
<!-- scripts -->
<a href="#">Read more...</a>
</body>
</html>Please see the Contributing to Assemble guide for information on contributing to this project.
- handlebars-helpers
- helpers: some great handlebars helpers that we decided not to include in the handlebars-helpers project, most likely because the code footprint was too big or the helper wasn't generic enough.
- grunt-prettify
Copyright (c) 2013 Jon Schlinkert, contributors. Released under the MIT license
This file was generated on Thu Nov 14 2013 02:25:44.