Once set up file-ext-switcher allows you to quickly switch via keyboard shortcuts between files which share same name but differ by extension (AKA companion files, e.g. from file.html to file.js). This is very useful for Angular (and even AngularJs) component development where you need to quickly switch between code, template, style and test files.

This extension provides key-bindable VS code commands for every supported file type that you specify. Please note that you must set up bindings first, see Setup.

Switch to/between any companion file(s) in the same directory that shares at least one file-name component. Examples of usage:

• Switch to styles .css or .scss
• Open .html template in another editor column in split mode
• Switch between .ts and generated .js files
• Switch from .ts to .spec.ts and back

Bind your custom keybindings to the fileextswitch commands for super-fast switching.

1. In VSCode open Command Palette
2. Type in and select Preferences: Open Keyboard Shortcuts File
3. Add one or more custom file-ext-switcher keybinding into the file

A sample keybinding looks like this:

{
    "key": "ctrl+shift+j",
    "command": "fileextswitch",
    "args": { 
        "extensions": [".html", ".ts",], // extensions to switch to (in the exact order)
        "useOtherColumn": true // open companion file in other editor column (default false)
    }, 
    "when": "editorTextFocus"
},

These shortcuts open a companion file in the other editor column (note the useOtherColumn: true), so you can quickly open your component.ts definition next to your component.html:

{
    "key": "ctrl+shift+j",
    "command": "fileextswitch",
    "args": { "extensions": [".html"], "useOtherColumn": true }, 
    "when": "editorTextFocus"
},
{
    "key": "ctrl+shift+k",
    "command": "fileextswitch",
    "args": { "extensions": [".js", ".ts"], "useOtherColumn": true }, 
    "when": "editorTextFocus"
},
{
    "key": "ctrl+shift+l",
    "command": "fileextswitch",
    "args": { "extensions": [".css", ".scss"], "useOtherColumn": true }, 
    "when": "editorTextFocus"
},
{
    "key": "ctrl+shift+;",
    "command": "fileextswitch",
    "args": { "extensions": [".spec.ts"], "useOtherColumn": true }, 
    "when": "editorTextFocus"
}

When invoked, the command will look for files in the same directory of the current file, which share at least one base component (e.g. "app" for a file named "app.module.ts"). Matching follows the order of specified extensions, locating the current file's extension in the list and then cycling through to the next file extension. This allows e.g. to generate a keyboard shortcut for cyclic switching between file extensions:

{
        "key": "ctrl+shift+i",
        "command": "fileextswitch",
        "args": {
            "extensions": [
                ".ts",
                ".html",
                ".scss"
            ]
        },
        "when": "editorTextFocus"
    }

Please report issues and submit pull-requests to https://github.com/JohannesRudolph/vscode-file-ext-switcher

If you prefer a graphical companion file switcher and can live without keybindings, check out the excellent companion-file-switcher extension.