This is an easy way to change a Discourse icon globally.
- Right click on the icon you want to change and select “Inspect element” or “Inspect” (depends on the browser)
- Find the icon name
- Search a new icon here Font Awesome Icons, e.g. external-link
- Customize and add the code in your
admin > customize > themes > Header tab
<script type="text/discourse-plugin" version="0.8">
api.replaceIcon('link', 'external-link');
</script>
Result:
![image]()
All the “link” icons will be replaced by “external-link”.
Note that if an icon is used for multiple elements in other pages, such as badges, the icon will also be replaced there.
Exceptions
Note that there is already a theme component that allow you to change the Like icon. I’m using this case as example
The “heart” icon, used to give Like, is hardcoded with other names ('d-liked' and 'd-unliked') and should be treated differently than other icons, so to change the ![:heart:]( ":heart:")
icon with ![:+1:]( ":+1:")
icon:
<script type="text/discourse-plugin" version="0.8">
api.replaceIcon('d-liked', 'thumbs-up');
api.replaceIcon('d-unliked', 'thumbs-o-up');
</script>
![like]()
![firefox_2018-04-24_18-37-02]()
but on the badge page the icon is still “heart”:
![firefox_2018-04-24_18-38-15]()
so to change it on that page we add:
<script type="text/discourse-plugin" version="0.8">
api.replaceIcon('d-liked', 'thumbs-up');
api.replaceIcon('d-unliked', 'thumbs-up');
api.replaceIcon('heart', 'thumbs-up');
</script>
![firefox_2018-04-24_18-47-50]()
Another example:
<script type="text/discourse-plugin" version="0.8">
api.replaceIcon('d-watching', 'eye');
</script>
changes the watching icon:
![watching-original]()
![watching]()
See here other exceptions that cover the tracking status, expand/collapse, notifications and likes of course.
const REPLACEMENTS = {
'd-tracking': 'circle',
'd-muted': 'times-circle',
'd-regular': 'circle-o',
'd-watching': 'exclamation-circle',
'd-watching-first': 'dot-circle-o',
'd-drop-expanded': 'caret-down',
'd-drop-collapsed': 'caret-right',
'd-unliked': 'heart-o',
'd-liked': 'heart',
'notification.mentioned': "at",
'notification.group_mentioned': "at",
'notification.quoted': "quote-right",
'notification.replied': "reply",
'notification.posted': "reply",
'notification.edited': "pencil",
'notification.liked': "heart",
'notification.liked_2': "heart",
'notification.liked_many': "heart",
'notification.private_message': "envelope-o",
'notification.invited_to_private_message': "envelope-o",
'notification.invited_to_topic': "hand-o-right",
'notification.invitee_accepted': "user",
'notification.moved_post': "sign-out",
'notification.linked': "link",
'notification.granted_badge': "certificate",
'notification.topic_reminder': "hand-o-right",
'notification.watching_first_post': "dot-circle-o",
'notification.group_message_summary': "group"
};
Ref: discourse/icon-library.js.es6 at master · discourse/discourse · GitHub
Feel free to create other themes component and share it in our #theme category!
icon with the 
icon (or any other font awesome glyph you prefer).
