If you are coding a web page, you can try sharing your code using jsfiddle .
Otherwise, if your code is self-contained in one file, you can use a paste site such as ideone or paste.debian.net. If you are using an IRC chatroom (which are also called “IRC channels”), don't floodpaste the code to the channel because this is slower and more annoying than using a paste site and may get you kicked or devoiced out of the channel.
If the code you are sharing is a reusable component, you can use Bit to isolate it and share it so that it can be installed or imported in other projects.
Some other types of forums allow you to quote a single and self-contained codebase using a notation such as the HTML “pre” tags, or using indentation or triple-backquotes, so it may be an option there depending on the forum’s policy.
If you have more than one file in the project, then you should put it in a self-contained version control repository on a code sharing site such as GitHub , Bitbucket , or GitLab , so people can easily clone or checkout it.