Beyond these, also use jsbeautifier.org, which will allow automatic code formatting. Use that before committing code.
Code style conventions (much taken from http://javascript.crockford.com/code.html)
- Do not use tab to format code. Use 4 spaces instead (configurable through a good IDE)
- Avoid lines longer than 120 characters (again can be set through an IDE)
- Class comments should be using /** */
- Generally use line comments. Save block comments for formal documentation and for commenting out.
- Give variables their own line and arrange them alphabetically (with nice line comments)
- Define all variables at the top of the function.
- Use camelCase for variable and function names
- Global variables should be in all caps
- Use of global variables should be minimized. Implied global variables should never be used.
- Remove trailing commas if there is no other field following
- Use {} instead of new Object(). Use [] instead of new Array().
- It is almost always better to use the === and !== operators. The == and != operators do type coercion. In particular, do not use == to compare against falsy values.
- Define a route for every view you create in ST/extjs. Route and view should have the same name.