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how to highlight JSON?

This question is in reference to Atlassian Documentation: Code Block Macro

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4 answers

1 accepted

3 votes
Answer accepted

Your best bet is to choose "Javascript" from the syntax highlighting option. Otherwise you can install a custom SyntaxHighlighter brush like this one:

This doesn't work for SyntaxHighlighter in the confluence code makro.

(Atlassian should improve the documentation and stop using outdated extensions like syntaxhighlighter)

Like # people like this

Use this brush for JSON, save it as a file and add it via confluence code macro. Have fun ;-)

* Author: Robert Galovic, AVINOC -
* License: GPL-2 | GPL-3
* JSON brush for confluence syntaxhighlighter
SyntaxHighlighter.brushes.JSON = function()
var key_bool = 'true false null NULL';
this.regexList = [
{ regex: new RegExp(this.getKeywords(key_bool), 'gm'), css: 'value' },
{ regex: /[^\D](\d?\.?\d+)/gm, css: 'constants' },
{ regex: /((\"[\w]+\S*[^\\]\"))(?=[\:]|\s\:)/gm, css: 'variable' },
{ regex: SyntaxHighlighter.regexLib.doubleQuotedString, css: 'string' },
{ regex: /((\'[\w]+\S*[^\\]\'))(?=[\:]|\s\:)/gm, css: 'comments' },
{ regex: SyntaxHighlighter.regexLib.singleQuotedString, css: 'comments' },
SyntaxHighlighter.brushes.JSON.prototype = new SyntaxHighlighter.Highlighter();
SyntaxHighlighter.brushes.JSON.aliases = ['json', 'Json', 'JSON'];

(If you like, you can customize it by changing the css definitions. Single quoted JSON entries wont comply to the standard, so I used "comments" css on them to mark them for being able later on to correct them easily)

Thanks a lot @Robert Galovic  this is very useful.

Can't believe this is still not a native feature of confluence.

One improvement, change

{ regex: /[^\D](\d?\.?\d+)/gm, css: 'constants' },


{ regex: /-?(0|[1-9]\d*)(\.\d+)?([eE][+-]?\d+)?/gm, css: 'constants' },

 This will allow to highlight numbers followed by a comma.

Best regards.


Like Robert_Galovic likes this

This worked but only when I preview a page. If I try to access a saved page normally I get an alert dialog "Can't find brush for: json"

You could use JSON Viewer Macro for Confluence (Cloud & Server) 

Even though this question is quite old, for Confluence Cloud you can give our app Prism Syntax Highlighter for Confluence (see a try.

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