JavaScript timer implements progress bar function

This article mainly introduces JavaScript to implement the progress bar function based on the timer. It briefly analyzes the function and usage of the JavaScript timer and gives an example of the progress bar function based on the timer. Friends who need it can refer to it. I hope it can help. to everyone.

Timer in Javascript

The method below window is window.setInterval() to start the timer

1.setInterval(function(function),time(every other How long to execute the function once, the unit is milliseconds))

will repeatedly perform an operation

2.setTimeout is used to delay a period of time before performing an operation

setTimeout (function, time), setTimeout will not be repeated!

Stop the timer

setTimeout corresponds to clearTimeout(object) Clear the set setTiemout object

setInterval corresponds to clearInterval(object) Clear the setInterval object

Give a case:

Running effect:

When running the program, the progress bar on the web page will load, loading The speed is related to time!

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