Introduction and application of js setTimeout of function take countdown as an example
- 2020-03-30 00:53:05
- OfStack
Definition and usage:
The setTimeout() method is used to call a function or evaluate an expression after a specified number of milliseconds.
Grammar:
SetTimeout (code, millisec)
Parameters:
Code (required) : a string of JavaScript code to be executed after the function to be called.
Millisec (required) : number of milliseconds to wait before executing the code.
Tip:
SetTimeout () executes code only once. If you want to make multiple calls, use setInterval() or have the code itself call setTimeout() again.
For example:
The setTimeout() method is used to call a function or evaluate an expression after a specified number of milliseconds.
Grammar:
SetTimeout (code, millisec)
Parameters:
Code (required) : a string of JavaScript code to be executed after the function to be called.
Millisec (required) : number of milliseconds to wait before executing the code.
Tip:
SetTimeout () executes code only once. If you want to make multiple calls, use setInterval() or have the code itself call setTimeout() again.
For example:
<script language="javascript">
function timer(){
var value=Number(document.all['time'].value);
if (value>1) document.all['time'].value=value-1;
else {
document.all['time'].value=" Agreed to ";
return false;
}
window.setTimeout("timer()",1000);
}
</script>
<body onload="timer()">
<input name="time" value="10" type="button" style="width:40px;" />
</body>