Pass parameters in setInterval function

Question

Please advise how to pass parameters into a function called using setInterval.

My example setInterval(funca(10,3), 500); is incorrect.

Answer 1

You need to create an anonymous function so the actual function isn't executed right away.

setInterval( function() { funca(10,3); }, 500 );

Answer 2

now with ES5, bind method Function prototype :

setInterval(funca.bind(null,10,3),500);

Reference here

Answer 3

Add them as parameters to setInterval:

setInterval(funca, 500, 10, 3);

The syntax in your question uses eval, which is not recommended practice.

Answer 4

You can pass the parameter(s) as a property of the function object, not as a parameter:

var f = this.someFunction;  //use 'this' if called from class
f.parameter1 = obj;
f.parameter2 = this;
f.parameter3 = whatever;
setInterval(f, 1000);

Then in your function someFunction, you will have access to the parameters. This is particularly useful inside classes where the scope goes to the global space automatically and you lose references to the class that called setInterval to begin with. With this approach, "parameter2" in "someFunction", in the example above, will have the right scope.

Answer 5

     setInterval(function(a,b,c){

          console.log(a + b +c);  

      }, 500, 1,2,3);

           //note the console will  print 6
          //here we are passing 1,2,3 for a,b,c arguments
         // tested in node v 8.11 and chrome 69

Answer 6

You can use an anonymous function;

setInterval(function() { funca(10,3); },500);

Answer 7

setInterval(function,milliseconds,param1,param2,...)

Update: 2018 - use the "spread" operator

function repeater(param1, param2, param3){
   alert(param1);
   alert(param2);
   alert(param3); 
}

let input = [1,2,3];
setInterval(repeater,3000,...input);

Answer 8

By far the most practical answer is the one given by tvanfosson, all i can do is give you an updated version with ES6:

setInterval( ()=>{ funca(10,3); }, 500);

Answer 9

Quoting the arguments should be enough:

OK --> reloadIntervalID = window.setInterval( "reloadSeries('"+param2Pass+"')" , 5000)

KO --> reloadIntervalID = window.setInterval( "reloadSeries( "+param2Pass+" )" , 5000)

Note the single quote ' for each argument.

Tested with IE8, Chrome and FireFox

Answer 10

I know this topic is so old but here is my solution about passing parameters in setInterval function.

Html:

var fiveMinutes = 60 * 2;
var display = document.querySelector('#timer');
startTimer(fiveMinutes, display);

JavaScript:

function startTimer(duration, display) {
    var timer = duration,
        minutes, seconds;

    setInterval(function () {
        minutes = parseInt(timer / 60, 10);
        seconds = parseInt(timer % 60, 10);

        minutes = minutes < 10 ? "0" + minutes : minutes;
        seconds = seconds < 10 ? "0" + seconds : seconds;

        display.textContent = minutes + ":" + seconds;
        --timer; // put boolean value for minus values.

    }, 1000);
}

Answer 11

This works setInterval("foo(bar)",int,lang);.... Jon Kleiser lead me to the answer.

Answer 12

Another solution consists in pass your function like that (if you've got dynamics vars) : setInterval('funca('+x+','+y+')',500);

Answer 13

You can use a library called underscore js. It gives a nice wrapper on the bind method and is a much cleaner syntax as well. Letting you execute the function in the specified scope.

http://underscorejs.org/#bind

_.bind(function, scope, *arguments)

Answer 14

That problem would be a nice demonstration for use of closures. The idea is that a function uses a variable of outer scope. Here is an example...

setInterval(makeClosure("Snowden"), 1000)

function makeClosure(name) {
var ret

ret = function(){
    console.log("Hello, " + name);
}

return ret;
}

Function "makeClosure" returns another function, which has access to outer scope variable "name". So, basically, you need pass in whatever variables to "makeClosure" function and use them in function assigned to "ret" variable. Affectingly, setInterval will execute function assigned to "ret".