Sort ES2015 (aka ES6) imports directly from within Atom. Both JavaScript and TypeScript are supported.
After you installed the package you can sort your imports using the Ctrl + Alt + o key binding or trigger it manually from the command palette with the Import Sort: Sort command.
The package also offers a "sort on save" option to automatically sort your imports whenever you save a JavaScript or TypeScript file. It's disabled by default.
See import-sort for information about customizing the way imports are sorted.