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JavaScript Asynchronous Programming with JavaScript Asynchronous JavaScript with Callbacks Callback Functions Review

What does invoke callback means here? what does it work as?

function makeMeal(meal, cb) { alert(Preparing ${meal}.); ; }

makeMeal('lunch', () => { alert('Finished the meal!'); });

1 Answer

Hi Hanwen!

Invoke just means call/run/execute/trigger (that funtion), which is what () does.

For example: playSound(); is invoking the playSound function - much like hitting a 'PLAY' button on a CD player.

I hope that helps.

Stay safe and happy coding!

Got it. Thank you Peter