JavaScript method that accepts two functions as arguments

Question

What is the proper syntax for passing two or more functions to a method, like in this example

setInterval("javascript function",milliseconds);

is the following correct?

setInterval("pushmarkers();clearOverlays();loadmarkers();",5000);

Answer 1

Answer №1

Enclose them within a new function:

setInterval(function() {
  updateMarkers();
  removeOverlays();
  refreshMarkers();
}, 5000);

Answer 2

Enclose them within a new function:

setInterval(function() {
  updateMarkers();
  removeOverlays();
  refreshMarkers();
}, 5000);

Answer 3

Avoid passing strings to the setInterval function as it uses eval, which can be risky.

Instead, consider using an anonymous function like this:

setInterval(function () {
    addMarkers();
    removeOverlays();
    fetchMarkers();
}, 5000);

Alternatively, you can use a named function like so:

var intervalFunction = function () {
    addMarkers();
    removeOverlays();
    fetchMarkers();
};

setInterval(intervalFunction, 5000);

Answer 4

Avoid passing strings to the setInterval function as it uses eval, which can be risky.

Instead, consider using an anonymous function like this:

setInterval(function () {
    addMarkers();
    removeOverlays();
    fetchMarkers();
}, 5000);

Alternatively, you can use a named function like so:

var intervalFunction = function () {
    addMarkers();
    removeOverlays();
    fetchMarkers();
};

setInterval(intervalFunction, 5000);

Answer 5

It's not considered good practice because when using setInterval, you should pass functions as arguments rather than strings.

To solve this issue, create a function that calls other functions by wrapping them in an anonymous function like this:

setInterval(function(){ pushmarkers(); clearOverlays(); loadmarkers(); }, 5000);

Alternatively, you can define a named function that includes the function calls and then pass it to setInterval like this:

function multifunction(){
    pushmarkers();
    clearOverlays();
    loadmarkers();
}

setInterval(multifunction, 5000);

Answer 6

It's not considered good practice because when using setInterval, you should pass functions as arguments rather than strings.

To solve this issue, create a function that calls other functions by wrapping them in an anonymous function like this:

setInterval(function(){ pushmarkers(); clearOverlays(); loadmarkers(); }, 5000);

Alternatively, you can define a named function that includes the function calls and then pass it to setInterval like this:

function multifunction(){
    pushmarkers();
    clearOverlays();
    loadmarkers();
}

setInterval(multifunction, 5000);