javascript-timers Flashcards

1
Q

What is a “callback” function?

A

It is a function passed in through another function as an argument

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2
Q

Besides adding an event listener callback function to an element or the document, what is one way to delay the execution of a JavaScript function until some point in the future?

A

Use setTimeout( ) function

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3
Q

How can you set up a function to be called repeatedly without using a loop?

A

Use setInterval( ) function

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4
Q

What is the default time delay if you omit the delay parameter from setTimeout( ) or setInterval( )?

A

0 milliseconds

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5
Q

What is the default time delay if you omit the delay parameter from setTimeout( ) or setInterval( )?

A

0 milliseconds

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6
Q

What do setTimeout( ) and setInterval( ) return?

A

setTimeout( ): The returned timeoutID is a positive integer value which identifies the timer created by the call to setTimeout( )
setInterval( ): The returned intervalID is a numeric, non-zero value which identifies the timer created by the call to setInterval( )

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