juicy-html

<juicy-html>

Declarative way for client-side includes

<juicy-html> is a custom element that lets you load HTML partials from JS objects and external files into your DOM. It acts more or less, as include statement known in many other languages. It also provides data binding, that works for native JS/HTML as well as for Polymer's dom-bind.

External files

To load HTML from external file all you need is:

<template is="juicy-html" href="./path/to/file.html"></template>

Markup provided by attribute

<template is="juicy-html" html="<h1>Hello World</h1>"></template>

Data Binding

juicy-html may forward given model object to stamped elements.

<template is="juicy-html"
  html='
    All those nodes will get <code>.model</code> property
    with the reference to the object given in model attribute.
    <template is="dom-bind">
      <p>which can be used by <span>{{model.polymer}}</span></p>
    </template>
    <custom-element>that uses `.model` property<custom-element>
    <script>
      // script that may use
      alert( document.currentScript.model );
    </script>'
  model='{
    "polymer": "Polymer&apos;s dom-bind",
    "vanilla": "as well as by native JS <code>&amp;lt;script&amp;gt;</code> or custom elements"
   }'>

HTML may naturally be provided from external file, and model can be provided using Polymer's/or any other data-binding as real object (not a string)

Demo

Live examples

Rationale

juicy-html provides a way to extend native <template>'s feature to be able to load content from outside (external file, data server, etc.).

It was started as an addition to Polymer's template binding, as there is no built-in way to insert a <template>'s model variable as HTML (Polymer inserts every string as plain text), AngularJS has a way to do it (ngBindHtml) so we found it convenient to do so in Polymer.

Currently it plain JavaScript, library agnostic custom element, that should work fine with any kind of binding, or none - as simple way to include HTML content from outside.

Features

Your HTML partials can contain:

• regular HTML
• inline scripts using <script>//JS code here</script>
• inline styles using <style>/*CSS code here*/</style>
• external stylesheets using <link rel="stylesheet" href="path/to/file.css">, with href value relative to the document
• external scripts using <script src="path/relative/to/main/document.js"></script>

Of course, the 2-way data binding attached within your partials will work as desired.

Please note, that loaded <script> and <style> will be executed every time HTML content is stamped to your document.

Usage

1. Import Web Components' polyfill (if needed):

   <script src="bower_components/webcomponentsjs/webcomponents.js"></script>
   

2. Import Custom Element:

   <link rel="import" href="bower_components/juicy-html/juicy-html.html">
   

3. Start using it!

   Load HTML partial from a string:

   <template is="juicy-html" html="<b>some</b> HTML"></template>
   <!-- Or <template is="juicy-html" html="{{var}}"></template> where {{ var }} equals "<b>some</b> HTML" -->
   

   Load HTML partial from a URL:

   <template is="juicy-html" href="./path/to/file.html"></template>
   <!-- Or <template is="juicy-html" href="{{var}}"></template>
        where {{var}} equals "./path/to/file.html", a path relative to the document that must start with / or ./ -->
   

Attributes

Attribute	Options	Default	Description
html	string	""	Safe HTML code to be stamped. Setting this one will skip any pending request for href and remove href attribute.
href	string	""	Path of a partial to be loaded. Setting this one will remove html attribute.
model(optional)	*Object	String*	undefined

Properties

Property	Type	Default	Description
model	Object	undefined	See attributes
html	string	""	See attributes
href	string	""	See attributes
pending	XMLHttpRequest		pending XHR if any

Please note, that properties are available after element is upgraded. To provide a state before element is upgraded, please use attributes.

Events

Name	details	Description
stamped	Array of Node s	Trigger every time content is (re-)stamped, with array of stamped nodes in event.detail

Methods

Name	Description
skipStampingPendingFile	Call to disregard currently pending request

Dependencies

<juicy-html> is framework agnostic custom element, so all you need is Web Components support. However, it plays really nice with Polymer Auto-binding templates, or any other binding library, that sets HTML elements' properties and/or attributes. Check our demos and examples.

Browser compatibility

Name	Support	Comments
Chrome 48	yes
Firefox 43	yes
IE 11	partially	document._currentScript behaves wrong in inserted scripts
Edge 25	yes
Safari 10-11	yes
Safari 9-	not tested

Contributing

1. Fork it!
2. Create your feature branch: git checkout -b my-new-feature
3. Commit your changes: git commit -m 'Add some feature'
4. Push to the branch: git push origin my-new-feature
5. Submit a pull request :D

History

For detailed changelog, check Releases.

License

MIT