JavaScript study notes: timer_basic knowledge

Timer 1

Used to specify a program to be executed after a specific period of time.

setTimeout():

Format: [timer object name=] setTimeout(“”, milliseconds)

Function: Execute once.

Example:

Copy code The code is as follows:

Timer 2

Continuously execute the expression repeatedly at certain intervals.

setInterval():

Format: [timer object name=] setInterval(“”, milliseconds)

Function: Repeat until the window or frame is closed or clearInterval is executed.

clearInterval():

Format: clearInterval (timer object name)

Function: Terminate timer

Example:

Copy code The code is as follows:

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