client-side-js
Skill from val-town/plugins
Install
npx skills add val-town/plugins --skill client-side-js
Runs the open skills CLI and installs the skill for your agent (Claude Code, Codex, Cursor …). Alternatively copy the skill folder into .claude/skills/ or upload it in Claude.ai under Settings → Skills.
As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-official
/plugin install valtown@valtown
This skill is part of the plugin “valtown”. In Claude Code the plugin installs it together with the plugin’s other skills, commands and hooks.
What does the client-side-js skill do?
Description from the SKILL.md in the source repository.
Questions about client-side-js
What does the client-side-js skill do?
Use when a val needs to ship JavaScript that runs in the browser — React apps, vanilla DOM scripts, canvas/games, htmx/Alpine, or any client-side module beyond a single inline snippet. Explains how Val Town serves transpiled .ts/.tsx/.jsx modules with no build step, how the browser resolves their imports, and how to load third-party deps.
How do I install client-side-js?
In a terminal: npx skills add val-town/plugins --skill client-side-js. The skills CLI asks which agents to install it for. In Claude.ai you can upload the skill folder as a ZIP under Settings → Skills.
Which agents can use client-side-js?
Skills use the open SKILL.md format, which Claude Code, Claude.ai, the Claude API, OpenAI Codex, Cursor, Gemini CLI and other agents support.
Is client-side-js safe to use?
Our automatic check found no risky patterns (piped shell scripts, hidden characters, secret access, prompt overrides). It is not a full audit – read the SKILL.md and any scripts before installing.
More skills from val-town/plugins
Use when a val needs simple key/value persistence — JSON documents, cached responses, uploaded files, or binary assets.
Use when the user wants to persist a preference, skill, or knowledge. Use when it would aid future val development to store a memory of how best to build something.
Use when building a val that runs on a schedule — periodic jobs, recurring tasks, polling, cron jobs, monitoring, alerting.
Use when a val sends email, receives email, or is triggered by an incoming email. Covers email-type vals (the Email handler shape, attachment limits, the assigned val email address) and sending mail …
Use when building an HTTP val — a web endpoint, API route, webhook receiver, or any val that responds to HTTP requests.
Use when a val needs to require login with a Val Town account — gating routes behind authentication, identifying the current user, building user-specific dashboards.
Use when building any val with a user interface — dashboards, web apps, landing pages, forms, admin tools, anything users see in a browser.
Use when a val's HTTP endpoints should not be open to the whole internet — limiting an app to a team, understanding why an endpoint redirects to a login page, letting a …
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