Invisible mode

You can use new Cap({ ... }) in your client-side JavaScript to create a new Cap instance and use the solve() method to solve the challenge.

const cap = new Cap({
  apiEndpoint: "/api/"
});
const solution = await cap.solve();

console.log(solution.token);

You can also set up event listeners:

const cap = new Cap({
  apiEndpoint: "/api/"
});

cap.addEventListener("progress", (event) => { 
  console.log(`Solving... ${event.detail.progress}% done`);
});

Behind the scenes, Cap creates a hidden cap-widget element and uses it to solve the challenge.

Supported methods and arguments

The following methods are supported:

new Cap({ ... })

Creates a new Cap instance. If a 2nd argument is provided, it will use that element instead of creating a new one in memory.

Arguments

{
  apiEndpoint: ..., // api endpoint, similar to the widget `data-cap-api-endpoint` attribute
  workers: navigator.hardwareConcurrency || 8 // number of worker threads to use
}

cap.solve()

Requests and solves a challenge.

Output: { token }

cap.token

Returns the token from the latest solve

cap.reset()

Resets cap.token

cap.addEventListener(..., function () { ... })

Listens for an event for the cap widget. See supported events