CODEWITHSUNDEEP
javascript
jason
jason

Reputation: 15

issue with multiple window onload

I luckily found this code on the net for continuos add on onload from a different subject completely

function myPluginLoadEvent(func) {
        // assign any pre-defined functions on 'window.onload' to a variable
        var oldOnLoad = window.onload;
        // if there is not any function hooked to it
        if (typeof window.onload != 'function') {
            // you can hook your function with it
            window.onload = func
        } else { // someone already hooked a function
            window.onload = function () {
                // call the function hooked already
                oldOnLoad();
                // call your awesome function
                func();
            }
        }
    }

    // pass the function you want to call at 'window.onload', in the function defined above
    myPluginLoadEvent(func);

However, this only allow for one add on onload call. How do I loop this for multiple on load call such as for i, 1++ ? Many thanks in advance.

Upvotes: 0

Views: 407

Answers (1)

Barmar
Barmar

Reputation: 781833

The code you posted will work repeatedly. Each time it's called, oldOnLoad contains whatever was previously assigned to window.onload, which could be the result of a previous use. So it just keeps chaining all the functions.

However, the modern approach is to use addEventListener rather than assigning to window.onload.

window.addEventListener("load", func);

Upvotes: 1

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