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Example of javascript interval call and delayed call

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Author: User
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Example of javascript interval call and delayed call

This article describes examples of javascript interval call and delayed call, and describes how to use the setInterval and clearInterval methods.

The setInterval method can be used to call the function cyclically at a specified interval until the clearInterval method cancels the loop.

 

When the clearInterval method is used to cancel a loop, you must assign a value to the call of the setInterval method, and then the clearInterval method references the variable.

 

The Code is as follows:

<Script type = "text/javascript">

Var n = 0;

Function print (){

Document. writeln (n );

 

If (n = 1000 ){

Window. clearInterval (s );

}

N ++;

}

Var s = window. setInterval (print, 10 );

</Script>

 

 

Use setTimeout and clearTimeout to call latency. After the specified delay time, run the specified function only once. ClearTimeout is used in the same way as clearInterval.

 

The Code is as follows:

<Script type = "text/javascript">

Function printTime (){

Var time = new Date ();

Var year = time. getFullYear ();

Var month = (time. getMonth () + 1;

Var daynum = time. getDay ();

Var hour = time. getHours ();

Var min = time. getMinutes ();

Var sec = time. getSeconds ();

Var da = time. getDate ();

Var daystr;

Switch (daynum ){

Case 0: daystr = "Sunday ";

Break;

Case 1: daystr = "Monday ";

Break;

Case 2: daystr = "Tuesday ";

Break;

Case 3: daystr = "Wednesday ";

Break;

Case 4: daystr = "Thursday ";

Break;

Case 5: daystr = "Friday ";

Break;

Case 6: daystr = "Saturday ";

Break;

Default: daystr = "";

}

Var str = year + "year" + month + "month" + da + "day" + daystr + "" + hour + ":" + min + ":" + sec;

Document. getElementById ("t"). innerHTML = str;

Window. setTimeout (printtime, 1000 );

}

</Script>

 

<Body onload = "printTime ()">

<Br/>

<Div id = "t"> </div>

</Body>

 

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