glossary-panel
v1.0.0
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18F Site Glossary Panel
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Glossary panel
About
Add a simple glossary panel to your site to help your users understand jargon-y terms. As seen on betaFEC and EITI.
For example:
- https://beta.fec.gov/data/ - click on the book icon in the header
- https://useiti.doi.gov/how-it-works/production/ - click on "fossil fuel"
Getting started
Note: if you are a contributor, please see CONTRIBUTING for additional help.
Download
Via npm
npm install glossary-panel
Set up your HTML
The following is the bare minimum HTML needed in your document:
<button class="js-glossary-toggle">Glossary</button>
<div id="glossary" aria-describedby="glossary-title" aria-hidden="true">
<button title="Close glossary" class="js-glossary-close">Hide glossary</button>
<h2 id="glossary-title">Glossary</h2>
<label for="glossary-search">Filter glossary terms</label>
<input id="glossary-search" class="js-glossary-search" type="search" placeholder="e.g. Committee">
<ul class="js-glossary-list"></ul>
</div>
It includes a toggle button, a div for the glossary, a close button inside the glossary, a title, a search input and label, and a <ul>
for the terms.
Then, to add glossary terms to the body of the page, add a data-term
attribute to the terms. For example:
A <span data-term="committee">committee</span> is a thing.
The data attribute must match the text of the term in your JSON file exactly, but it is not case-sensitive.
Initialize
In whichever file you initialize your JavaScript components, initialize the glossary like so:
var Glossary = require('@18f/glossary');
// JSON file of terms and definitions
var terms = require('terms');
// Optional configurion objects
var selectors = { ... };
var classes = { ... };
new Glossary(terms, selectors, classes);
Configuration
The constructor expects an array of objects (terms
) that follows this pattern:
[
{
"term": "Glossary",
"definition": "A useful tool for finding the definitions of terms"
}
]
The constructor also accepts an optional hash of selectors
as its second parameter:
glossaryID
: ID of the glossary panel that will be shown and hidden. Default:#glossary
close
: ID or class of the close button inside the glossary panel. Default:.js-glossary-close
listClass
: Class of the<ul>
that will be populated with terms. Default:.js-glossary-list
searchClass
: Class of the<input>
that will be used to filter the list. Default:.js-glossary-search
toggle
: ID or class of the element that will be used to open and close the glossary in the main body of the document. Default:.js-glossary-toggle
And you can pass an optional hash of classes
to be applied to to the DOM:
definitionClass
: Single class applied to the<div>
that contains the term's definition. Default:glossary__definition
glossaryItemClass
: Single class applied to the<li>
that contains the term and deffinition. Default:glossary__item
highlightedTerm
: Single class applied to terms in the body when they are highlighted. Default:term--higlight
termClass
: Single class applied to the<button>
element that opens the definition. Default:glossary__term
Methods
Glossary.show()
: Show the glossaryGlossary.hide()
: Hide the glossaryGlossary.toggle()
: Toggle the glossary open or closedGlossary.destroy()
: Completely remove the glossary from the DOMGlossary.findTerm(term)
: If the glossary is opens, filters the list down to the term called, expands the term, and highlights the associated term in the DOM
Styling
To style the glossary terms and defintions in the accordion list, either use the default classes or whichever ones you passed in. To change the style of the buttons when the accordion elements are expanded, you can select for [aria-expanded="true"]
.
You will need to add styles for [aria-hidden="true"]
in order to hide the glossary panel and the glossary definitions.
License
Public domain
This project is in the worldwide public domain. As stated in CONTRIBUTING:
This project is in the public domain within the United States, and copyright and related rights in the work worldwide are waived through the CC0 1.0 Universal public domain dedication.
All contributions to this project will be released under the CC0 dedication. By submitting a pull request, you are agreeing to comply with this waiver of copyright interest.