wingify/across-tabs

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1671 stars · 108 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

AcrossTabs is a small (~4 KB gzipped) JavaScript library that enables safe communication between cross-origin browser tabs using the PostMessage API. It provides a handshake mechanism between parent and child tabs along with a full API for tab information and custom callbacks.

Use cases

• communicate between browser tabs from different origins
• send messages from a parent tab to child tabs it opened
• disable a button until a newly opened tab completes a handshake
• get a list of all child tabs opened by the current tab
• execute custom callbacks in a child tab when the parent sends a message
• coordinate state across multiple tabs of a web app

When to choose

• you need cross-origin tab-to-tab messaging that plain localStorage or BroadcastChannel can't safely provide
• you want a tiny UMD library that works everywhere without a framework
• you need a handshake flow to verify child tabs before enabling UI

When to avoid

• you only need same-origin tab communication (BroadcastChannel or storage events are simpler)
• your project uses modern APIs and you don't need the handshake abstraction
• you need actively developed features - the project is in maintenance mode

Facets

library · maturity maintenance

websocket middleware developer-tools web-development frontend browser-extensions browser cross-platform postmessage cross-origin browser-tabs tabs-communication handshake umd es6

Member repositories

For agents

markdown · JSON · MCP: product_card(name="wingify/across-tabs")