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How do I open the chat from my own button?

The three methods, a copy-paste button, and why the method is sometimes missing.

Live chat1 min readLast updated Oct 28, 2026TapCub teamPart of Turn on the chat widget

A button that opens chat

Once the bubble is on the page, the launcher adds three methods to window.tapcub.chat: open(), close() and toggle().

index.html

<button type="button" onclick="window.tapcub && tapcub.chat ? tapcub.chat.open() : location.href = 'https://chat.askcub.com/YOUR_SITE_KEY'">
  Chat with us
</button>

The fallback opens the standalone chat page when the bubble is not available, so the button always does something.

When `tapcub.chat` is missing

Chat is switched off, or the page has data-chat="false".
Hide bubble on mobile is on and the visitor is on a phone or a narrow window.
The launcher has not finished loading yet. It loads after the first pageview, so a click in the first moment after page load can come too early.

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