What is the difference between setTimeout and setInterval

setTimeout and setInterval are both timers in JS. You can specify a delay time before performing an operation. The difference is that setTimeout stops after performing an operation after the specified time, while setInterval can continue to loop. .

1. Both setTimeout and setInterval are timers in JS. They can specify a delay time before performing an operation. The difference is that setTimeout stops after performing an operation after the specified time, while setInterval can continue to loop.

function fun(){
  alert('hello');
}
  setTimeout(fun,1000);//参数是函数名
  setTimeout('fun()',1000);//参数是字符串
  setInterval(fun,1000);
  setInterval('fun(),1000');

In the above code, whether it is setTimeout or setInterval, parameters cannot be taken when using the function name as the calling handle, but parameters can be taken when calling using a string. For example: setTimeout('fun(name)',1000);

2. Instead of defining a separate function, place the function call directly in a function. You can use the function name as the call handle.

function fun(name){
  alert('hello'+' '+name);
}
setTimeout (function(){
  fun('Tom');
},1000);//参数是函数名

In the above code, the difference between setTimeout and setInterval is that setTimeout will pop up 'hello' after one second, and then it will not run again; while setInterval will pop up 'hello' every one second until it is used. clear syntax to clear the timer.

Recommended tutorial: "JS Tutorial"

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