Showing content from https://github.com/ripple/javascript-style-guide below:
GitHub - ripple/javascript-style-guide: JavaScript Style Guide
The Ripple Labs style guide is defined by the eslintrc file in this repository along with the supplemental rules listed below.
Additional Rules not covered by ESLint
- Declare variables in the deepest possible block and as close to their use as possible (the linter will catch issues with hoisting)
- Use soft tabs set to 2 spaces
- Use a leading underscore
_ when naming private properties
- Use
stack.push(x) instead of stack[stack.length] = x
- Copy arrays with
Array.slice
- Convert array-like objects to arrays with
Array.prototype.slice.call(arguments)
- Strings longer than 80 characters should be written across multiple lines using string concatenation.
- Never name a parameter
arguments, this will take precedence over the arguments object that is given to every function scope.
- Assign methods to the prototype object, instead of overwriting the prototype with a new object. Overwriting the prototype makes inheritance impossible: by resetting the prototype you'll overwrite the base!
- When attaching data payloads to events (whether DOM events or something more proprietary like Backbone events), pass a hash instead of a raw value. This allows a subsequent contributor to add more data to the event payload without finding and updating every handler for the event. For example, instead of:
It is recommended that you configure your text editor to show linter errors while you are typing.
Note that Sublime Text can optionally be configured for vim or emacs key bindings.
Jetbrains products (IDEA, WebStorm)
https://www.jetbrains.com/webstorm/help/eslint.html
npm install -g eslint- Enable ESLint from
File > Settings > Languages and Frameworks > JavaScript > Code Quality Tools > ESLint
- Point "ESLint package" to the installed eslint (osx default
/usr/local/lib/node_modules/eslint)
TODO: Write ESLint rules for
- Never name a parameter
arguments
- Never assign
<Function>.prototype = ...
- Warn when a variable is explicitly re-assigned
The rules in the previous section are from the Airbnb Style Guide
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