The spawn expression starts one async function invocation, and any expression that follows the spawn is executed immediately while the started async function task continues independently until it completes.

|  |  |
| --- | --- |
|  | # Continues until completed without blocking |
|  | spawn{AsyncFunction1()}  # Started at same time as expression0 |
|  | expression0         # Started at same time as AsyncFunction1() |

Continues until completed without blocking

spawn{AsyncFunction1()} # Started at same time as expression0 expression0 # Started at same time as AsyncFunction1()

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The following code shows the syntax for the spawn expression.

|  |  |
| --- | --- |
|  | expression0 |
|  | spawn{ expression1 } |
|  | expression2 |

expression0 spawn{ expression1 } expression2

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The diagram below shows the execution flow of the expressions.