How to switch text case in visual studio code

Question

Echoing justanotherdev's comment:

Mind-blowing and useful:

1. Command Palette: CTRL + SHIFT + p (Mac: CMD + SHIFT + p)
2. type >transform pick upper/lower case and press enter

I've written a Visual Studio Code extension for changing case (not only upper case, many other options): https://github.com/wmaurer/vscode-change-case

To map the upper case command to a keybinding (e.g. Ctrl+T U), click File -> Preferences -> Keyboard shortcuts, and insert the following into the json config:

{
  "key": "ctrl+t u",
  "command": "extension.changeCase.upper",
  "when": "editorTextFocus"
}

EDIT:

With the November 2016 (release notes) update of VSCode, there is built-in support for converting to upper case and lower case via the commands editor.action.transformToUppercase and editor.action.transformToLowercase. These don't have default keybindings.

The change-case extension is still useful for other text transformations, e.g. camelCase, PascalCase, snake-case, etc.

Quoted from this post:

The question is about how to make CTRL+SHIFT+U work in Visual Studio Code. Here is how to do it. (Version 1.8.1 or above). You can also choose a different key combination.

File-> Preferences -> Keyboard Shortcuts.

An editor will appear with keybindings.json file. Place the following JSON in there and save.

[
 {
    "key": "ctrl+shift+u",
    "command": "editor.action.transformToUppercase",
    "when": "editorTextFocus"
 },
 {
    "key": "ctrl+shift+l",
    "command": "editor.action.transformToLowercase",
    "when": "editorTextFocus"
 }
]

Now CTRL+SHIFT+U will capitalise selected text, even if multi line. In the same way, CTRL+SHIFT+L will make selected text lowercase.

These commands are built into VS Code, and no extensions are required to make them work.

To have in Visual Studio Code what you can do in Sublime Text ( CTRL+K CTRL+U and CTRL+K CTRL+L ) you could do this:

• Open "Keyboard Shortcuts" with click on "File -> Preferences -> Keyboard Shortcuts"
• Click on "keybindings.json" link which appears under "Search keybindings" field

• Between the [] brackets add:

  {
      "key": "ctrl+k ctrl+u",
      "command": "editor.action.transformToUppercase",
      "when": "editorTextFocus"
  },
  {
      "key": "ctrl+k ctrl+l",
      "command": "editor.action.transformToLowercase",
      "when": "editorTextFocus"
  }
  

• Save and close "keybindings.json"

---

Another way:
Microsoft released "Sublime Text Keymap and Settings Importer", an extension which imports keybindings and settings from Sublime Text to VS Code. - https://marketplace.visualstudio.com/items?itemName=ms-vscode.sublime-keybindings

For those who fear to mess anything up in your vscode json settings this is pretty easy to follow.

1. Open "File -> Preferences -> Keyboard Shortcuts" or "Code -> Preferences -> Keyboard Shortcuts" for Mac Users

2. In the search bar type transform.

3. By default you will not have anything under Keybinding. Now double-click on Transform to Lowercase or Transform to Uppercase.

4. Press your desired combination of keys to set your keybinding. In this case if copying off of Sublime i will press ctrl+shift+u for uppercase or ctrl+shift+l for lowercase.

5. Press Enter on your keyboard to save and exit. Do same for the other option.

6. Enjoy KEYBINDING

Now an uppercase and lowercase switch can be done simultaneously in the selected strings via a regular expression replacement (regex, CtrlH + AltR), according to v1.47.3 June 2020 release:

This is done through 4 "Single character" character classes (Perl documentation), namely, for the matched group following it:

• \l <=> [[:lower:]]: first character becomes lowercase
• \u <=> [[:upper:]]: first character becomes uppercase
• \L <=> [^[:lower:]]: all characters become lowercase
• \U <=> [^[:upper:]]: all characters become uppercase

$0 matches all selected groups, while $1 matches the 1st group, $2 the 2nd one, etc.

Hit the Match Case button at the left of the search bar (or AltC) and, borrowing some examples from an old Sublime Text answer, now this is possible:

1. Capitalize words

• Find: (\s)([a-z]) (\s matches spaces and new lines, i.e. " venuS" => " VenuS")
• Replace: $1\u$2

2. Uncapitalize words

• Find: (\s)([A-Z])
• Replace: $1\l$2

3. Remove a single camel case (e.g. cAmelCAse => camelcAse => camelcase)

• Find: ([a-z])([A-Z])
• Replace: $1\l$2

4. Lowercase all from an uppercase letter within words (e.g. LowerCASe => Lowercase)

• Find: (\w)([A-Z]+)
• Replace: $1\L$2
• Alternate Replace: \L$0

5. Uppercase all from a lowercase letter within words (e.g. upperCASe => uPPERCASE)

• Find: (\w)([A-Z]+)
• Replace: $1\U$2

6. Uppercase previous (e.g. upperCase => UPPERCase)

• Find: (\w+)([A-Z])
• Replace: \U$1$2

7. Lowercase previous (e.g. LOWERCase => lowerCase)

• Find: (\w+)([A-Z])
• Replace: \L$1$2

8. Uppercase the rest (e.g. upperCase => upperCASE)

• Find: ([A-Z])(\w+)
• Replace: $1\U$2

9. Lowercase the rest (e.g. lOWERCASE => lOwercase)

• Find: ([A-Z])(\w+)
• Replace: $1\L$2

10. Shift-right-uppercase (e.g. Case => cAse => caSe => casE)

• Find: ([a-z\s])([A-Z])(\w)
• Replace: $1\l$2\u$3

11. Shift-left-uppercase (e.g. CasE => CaSe => CAse => Case)

• Find: (\w)([A-Z])([a-z\s])
• Replace: \u$1\l$2$3