Expand snippets matching the current prefix with tab in Atom.

Select the Atom > Open Your Snippets menu to add your own snippets.

Snippets files are stored in a package's snippets/ folder and also loaded from ~/.atom/snippets.cson.

Snippet files can be either .json or .cson.

'.source.js':
  'console.log':
    'prefix': 'log'
    'body': 'console.log(${1:"crash"});$2'

The outermost keys are the selectors where this snippets should be active.

The next level of keys are the snippet names.

Under each snippet name is a prefix that should trigger the snippet and a body to insert when the snippet is triggered.

$ followed by a number are the tabs stops which can be cycled between by pressing tab once a snippet has been triggered.

The above example adds a log snippet to JavaScript files that would expand to.

console.log("crash");

The string "crash" would be initially selected and pressing tab again would place the cursor after the ;

You can also use multi-line syntax using """ for larger templates:

'.source.js':
  'if, else if, else':
    'prefix': 'ieie'
    'body': """
      if (${1:true}) {
        $2
      } else if (${3:false}) {
        $4
      } else {
        $5
      }
    """