How do I convert between snake_case, camelCase, MixedCase, and UPPER_CASE using vim-abolish coercions?

Explanation

The vim-abolish plugin by Tim Pope adds a cr (coerce) prefix command that instantly converts the word under the cursor between common naming conventions. This is invaluable when renaming variables, translating code between styles, or refactoring identifiers across a codebase.

How it works

Place the cursor on any word and use one of these coercions:

• crs — snake_case: myVariable → my_variable
• crm — MixedCase (PascalCase): my_variable → MyVariable
• crc — camelCase: my_variable → myVariable
• cru — UPPER_CASE: my_variable → MY_VARIABLE
• cr- — dash-case (kebab-case): my_variable → my-variable
• cr. — dot.case: my_variable → my.variable
• crt — Title Case: my_variable → My Variable

Each coercion works on the word under the cursor in normal mode and respects word boundaries intelligently.

Example

With cursor on userProfileData:

const userProfileData = {};

Pressing crs converts it to:

const user_profile_data = {};

Then cru would convert it to:

const USER_PROFILE_DATA = {};

Tips

• Combine with :s and gn for project-wide renaming: search for user_profile_data, then crc. on each match to convert to camelCase
• Works on acronyms too — URLParser becomes url_parser with crs
• vim-abolish also provides :Subvert for case-aware substitution across naming conventions in a single command
• Install via any plugin manager: tpope/vim-abolish