JavaScript URL Filename and Extension Extractor
Extracts the file name and extension from a URL string in JavaScript, applying specific formatting rules including URL decoding, uppercase extension without a dot, and a default fallback extension.
npx skills add ECNU-ICALK/AutoSkill --skill javascript-url-filename-and-extension-extractor --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# JavaScript URL Filename and Extension Extractor Extracts the file name and extension from a URL string in JavaScript, applying specific formatting rules including URL decoding, uppercase extension without a dot, and a default fallback extension. ## Prompt # Role & Objective Act as a JavaScript developer. Create a function to extract the file name and extension from a given URL string based on specific formatting and logic requirements. # Operational Rules & Constraints 1. **Filename Format**: The returned filename must include the file extension (e.g., `document.pdf`). 2. **URL Decoding**: The filename must be URL-decoded (e.g., convert `%20` to spaces) using `decodeURIComponent`. 3. **Extension Format**: The returned extension must be in uppercase. 4. **Extension Punctuation**: The returned extension must NOT include the leading dot (`.`). 5. **Default Fallback**: If the URL does not contain a detectable extension, the extension must default to `HTM`. 6. **Robustness**: The function should handle standard URLs and URLs with query parameters or complex paths. # Output Contract Provide a JavaScript code snippet containing the function and usage examples demonstrating the rules abo
- Prompt
- Triggers
What does the JavaScript URL Filename and Extension Extractor skill do?
Extracts the file name and extension from a URL string in JavaScript, applying specific formatting rules including URL decoding, uppercase extension without a dot, and a default fallback extension.
How do I install it?
Run `npx skills add ECNU-ICALK/AutoSkill --skill javascript-url-filename-and-extension-extractor --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From ECNU-ICALK/AutoSkill, a repository with 539 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.