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Jens Fischer edited this page Sep 12, 2019 · 7 revisions

The Haxe extension has built-in code formatting support using haxe-formatter. There's two ways to trigger formatting:

  • Run the Format Document command (Shift+Alt+F).

  • Enable "format on save" for formatting to be applied automatically whenever you save a document. This makes for a very convenient workflow where you can just type out some code without worrying too much about correct whitespace or indentation, and then have everything formatted nicely on Ctrl+S.

    You can place the setting in a [haxe] block so it only applies to .hx files:

    "[haxe]": {
        "editor.formatOnSave": true,
        "editor.formatOnPaste": true

If you ever accidentally find-and-replace all indentation with an empty string, that's also no problem:


When you first start using code formatting in a project, you probably want to reformat all files at once instead of having to trigger "format document" on each file individually. This is especially true if you're using a version control system such as Git, in which case you probably want to limit the diff caused by reformatting to a single commit.

To conveniently format entire directories of source files, you can use the command line version of haxe-formatter that's available on Haxelib:

haxelib install formatter
haxelib run formatter -s <source-directory>


While using haxe-formatter's default code style is encouraged, it's also highly configurable. A source file uses the hxformat.json file that is closest to it. Most projects have a consistent style and thus only need one hxformat.json in the project root directory (unless they use the default style).

The Haxe extension includes a JSON schema for hxformat.json, which enables auto-completion as well as some documentation:

For more details, check out haxe-formatter's readme.