ai-agent

Proposal Optional Chaining

Name: Proposal Optional Chaining
Author: tc39

4,911 stars70 forksHTMLUpdated 1/24/2022100% free · open source

What it does

The proposal-optional-chaining tool allows for safer navigation of nested object properties in JavaScript, preventing null pointer exceptions when trying to access properties that may not exist.

When to use it

•When working with complex, nested data structures and needing to access properties that may or may not exist
•When trying to reduce the number of null checks in your code to improve readability
•When porting code from other languages that have similar optional chaining syntax, such as Swift or Kotlin

Ready-to-paste prompt

const user = { address: { street: '123 Main St' } }; console.log(user?.address?.street); // Output: '123 Main St'

Heads up: Make sure you are using a compatible JavaScript runtime, such as Node.js 14 or later, or a browser that supports the '?.` syntax, as this proposal is not yet universally supported

Saves to your device

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

⚡ Runs out of the box

A prompt/skill package — nothing to install beyond adding it to your AI tool.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/proposal-optional-chaining && curl -fsSL https://workflowstacks.com/api/skills/proposal-optional-chaining/claude-skill -o ~/.claude/skills/proposal-optional-chaining/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How Proposal Optional Chaining works

Codeflow

Free to inspect

Proposal Optional Chaining is mostly documents (2 doc files, 1 small script) — something you read, not something you run. There is nothing to install. Last commit 56 months ago, no license file.

Size

Mostly documents

2 documents · 1 small script · 5 min skim

Setup

Nothing to install

A guide / curated list. Just read it and follow the links.

Runs on

Nowhere — you read it

A reading resource, not a program.

Where to start reading

1
README.md
Start here — what it does and how to install it

READMECI checksNo licenseLast update 56 mo agoArchived — read only

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

⚡ Runs out of the box

A prompt/skill package — nothing to install beyond adding it to your AI tool.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/proposal-optional-chaining && curl -fsSL https://workflowstacks.com/api/skills/proposal-optional-chaining/claude-skill -o ~/.claude/skills/proposal-optional-chaining/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

Quick Actions

Details

Creator

tc39

Language

HTML