Usage:

var BBCodeParser = require('bbcode-parser');
var parser = new BBCodeParser(BBCodeParser.defaultTags());
var html = parser.parseString('[b]Bold text[/b]');

You can also define your own tags:

var BBTag = require('bbcode-parser/bbTag');

var bbTags = {};

//Simple tag. A simple tag means that the generated HTML will be <tagName>content</tagName>
bbTags["b"] = BBTag.createSimpleTag("b");

//Tag with a custom generator.
bbTags["img"] = BBTag.createTag("img", function (tag, content, attr) {
	return "<img src=\"" + content + "\" />";
});

//Tag with a custom generator + attributes
bbTags["url"] = BBTag.createTag("url", function (tag, content, attr) {
	var link = content;

	if (attr["site"] != undefined) {
		link = BBCodeParser.escapeHTML(attr["site"]);
 	}

	if (!BBCodeParser.startsWith(link, "http://") && !BBCodeParser.startsWith(link, "https://")) {
		link = "http://" + link;
	}

	return "<a href=\"" + link + "\" target=\"_blank\">" + content + "</a>";
});

//A tag that doesn't support nested tags. Useful when implementing code highlighting.
bbTags["code"] = new BBTag("code", true, false, true, function (tag, content, attr) {
    return "<code>" + content + "</code>";
});

var parser = new BBCodeParser(bbTags);

BBTag constructor:

• tagName: The name of the tag.
• insertLineBreaks: Indicates if the tag inserts line breaks (\n -> <br>) in the content.
• suppressLineBreaks: Suppresses line breaks for any nested tag.
• noNesting: If the tags doesn't support nested tags.
• tagGenerator: The HTML generator for the tag. If not supplied the default one is used: <tagName>content</tagName>.

Documentation