Developer Tools
Extract JS Event Handler Names
Extract handleClick, onSubmit, and similar event-handler names from pasted JavaScript, TypeScript, JSX, or TSX source snippets without executing, rendering, compiling, or uploading code.
0 / 30,000 characters. No upload, storage, or account required.
JS event handler extraction workflows
Use this extractor when copied frontend code needs a browser-local interaction inventory before component cleanup, test planning, documentation, or migration work.
Audit React interactions
Pair handler names with Extract JS React Component Names, Extract JS Hook Names, and Extract JS Function Names.
Review source dependencies
Use Extract JS Module Specifiers, Extract JS Import Statements, and Extract JS Export Statements.
Clean copied output
Send extracted names to Sort Lines, Remove Duplicate Lines, or Normalize Whitespace.
What this tool does
Extract JS Event Handler Names scans pasted source as text, lists common handle*/on* handler declarations and assignments with source lines, removes duplicates, and runs locally in your browser.
Common use cases
Extract handleClick, onSubmit, and similar event-handler names from pasted JavaScript, TypeScript, JSX, TSX, UI modules, Storybook examples, or copied frontend source before interaction audits, refactors, test planning, documentation, or migration handoffs.
Use Extract JS Event Handler Names when you are working with copied API payloads, logs, encoded values, config snippets, identifiers, or debugging data and need a quick browser-local check before pasting the result into docs, tickets, tests, or another developer tool.
How to use it
- Paste React components, UI modules, handlers, Next.js files, Storybook examples, or copied source snippets that may contain event-handler functions.
- Choose whether duplicate handler names should be removed and whether extracted names should be normalized for comparison.
- Review handler names with source line numbers, then copy the clean list for interaction audits, refactors, test planning, documentation, or migration handoffs.
Example workflow
Copy a small payload or encoded value from an API response, request URL, log line, or config file. Run the focused check here, confirm the output is readable, then continue with related developer data tools such as validation, formatting, decoding, timestamp conversion, or CSV/JSON conversion.
Privacy note
Extract JS Event Handler Names runs locally in your browser. Your pasted code is not uploaded, compiled, rendered, fetched, executed, stored, or logged.
FAQ
Does Extract JS Event Handler Names run my UI code?
No. It scans pasted source as text and does not render components, execute handlers, compile TypeScript, fetch dependencies, upload, store, or log snippets.
Which handler names are included?
It finds common handle* and on* handler declarations or assignments such as handleSubmit, handleClick, onDismiss, and onFocus in pasted snippets.
When is this useful?
Use it while auditing UI interactions, preparing test plans, documenting components, reviewing copied TSX, or planning frontend refactors.
Explore more tools
Browse the Developer Tools hub or continue with the Developer Data Toolkit when this task is part of a larger workflow.