Question

I wrote a class in javascript that looks like this:

function main()
{
    this.var1 =0;
    this.clock = function()
    {
        var t = this;
        var n =1;
        window.setInterval(document.write(this.n++),1000);
    }
}

But after calling setInterval() ‘this’ refers to window. So i cannot access the variable inside the class. How can I solve this scope problem?

Answer 1

function main()
{
    this.var1 =0;
    this.clock = function()
    {
        var t = this;
        var n = 1;
        window.setInterval(function(){ document.write(n++); },1000);
    }
}

Notice that your code is wrapped in function.