Asynchronous Function Calls in BAS

Most BAS flows are linear: do this, then that. But sometimes a bot needs to do two things at the same time — and that’s what the Async Function Call module is for.

Normal vs asynchronous calls

A normal function call is strict and sequential: BAS runs the whole chain of actions inside the function and returns a result before the main flow continues. Nothing else happens until it finishes.

An asynchronous function is different. It’s a special function-action that runs independently of the main script, in parallel with it, and can even be paused mid-execution. You start it, the main flow keeps going, and you collect its result later — the call doesn’t block.

The actions

• Call async function — launch a function to run in parallel.
• Wait for async function execution — pause the main flow until the async function finishes, when you do need its result before continuing.
• Get async function result — read what the async function returned.
• Cancel async function — stop it early.

A concrete example

The classic case is working two sites at once. The first site monitors for a code arriving by email, or gathers information another site needs. The second site waits for that email or holds until the required information has been written. Running the first as an async function lets both progress together: one watches the inbox while the other stands ready, and the moment the data lands, the second proceeds — no wasted serial waiting.

When to reach for it

Async functions add complexity, so use them when parallelism genuinely helps: overlapping waits, monitoring something while doing something else, coordinating two browser contexts. For ordinary step-by-step work, a normal function call is simpler and clearer — reach for async only when “at the same time” is actually part of the task.