If you are interested in an ES6 linter for Brackets there is a plugin called “Brackets-ESLint” that will do the job. However, it cannot be installed like any other Brackets plugin. You must first install a plugin called “Brackets-npm-registry” which functions similarly to the Brackets plugin manager but for Brackets-specific NPM modules.
The Brackets-npm-registry Plugin
Visit the following URL and read through the installation instructions for your platform. Note that on Windows you may have to manually navigate to your AppData directory.
Note that installation may take a few minutes.
The Brackets-eslint Plugin
Once “Brackets-npm-registry” is installed you will notice a new icon in the Brackets plugin bar:
Clicking the plugin reveals the “Brackets-npm-registry” module manager:
Scroll through the list and locate “ESLint” – install the plugin (this may also take some time to complete)
Once installation is complete close the installation window, then close the NPM module manager, and then restart Brackets (F5 on Windows).
Working with ESLint
Upon installing ESLint and restarting Brackets you may see linting issues within the left gutter of opened JS files such as can be seen in the image below:
Place the cursor above the red/yellow icons wihtin the left gutter to reveal a tool-tip explaining the linting issue. Alternatively you can toggle the display of the complete list of issues at the bottom of your editing window (also visible within the above image).
Configuring the Linter
Comments can be added to code to configure the linter. Of particular interest is the ability to instruct the linter to ignore a line of code. For example, this JS comment will remove the line it sits on from linting:
For example, note the following image and how by virtue of the red “X” icon in the gutter that there is a linting issue for that line:
To tell the linter to ignore the line we add the comment to the end and thus the issue goes away:
For further configuration options, including specifying blocks of code to ignore and configuring the linter via in-code comments see the following guide:
Specifying your Preferred Linter
You may not want to use ES6 linting for your ES5-based projects. In that case you’ll want to update Bracket’s preferences file per the description here to use your preferred linter.