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Callback This Type

Checked
marius-townhouse·vlatest·backend

This skill automatically labels or categorizes incoming messages based on predefined types for streamlined workflows and data analysis.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add marius-townhouse/effective-typescript-skills --skill callback-this-type -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

marius-townhouse

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned marius-townhouse/effective-typescript-skills at d754db2077.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
d754db2077
Manifest
skills/callback-this-type/SKILL.md
Scanned
1 file, 60 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill helps ensure correct this context when using callbacks in TypeScript. It provides guidance on how to properly bind the this value, preventing common errors related to incorrect function execution contexts within event handlers or asynchronous operations. The skill promotes more robust and predictable code behavior by clarifying callback usage patterns.

When to use it

  • When working with event listeners where you need to access object properties from within the callback function.
  • In asynchronous operations (e.g., setTimeout, promises) where the value of this might be lost without explicit binding.
  • When refactoring JavaScript code to TypeScript and encountering issues related to this context in callbacks.
  • To improve the readability and maintainability of your codebase by ensuring consistent callback behavior.

Key capabilities

  • Provides explanations on how to use .bind() for this binding.
  • Offers guidance on arrow functions as an alternative to explicit binding.
  • Illustrates best practices for maintaining context in event handlers.

Example prompts

  • "How do I ensure the correct 'this' value when using a callback with a button click?"
  • "Explain how to use .bind() to preserve 'this' in a setTimeout function."
  • "What are the advantages of arrow functions for callbacks in TypeScript?"

Tips & gotchas

The skill assumes basic familiarity with JavaScript and TypeScript syntax. Pay close attention to examples involving event handlers, as incorrect this binding is a common source of errors in these scenarios.