Why won't this Javascript method keep calling itself?

Question

I have a JavaScript object with a privileged method. When this method has completed, I would like it to call itself (after a small timeout) and continue running indefinitely

Answer 1

because the this in your setTimeout is referring to the local function testMethod not Test -- essentially, you are saying setTimeout( testMethod.testMethod, 2000 )

function Test() {
    // ... private variables that testMethod needs to access ...
    var self = this;
    self.testMethod = function() {
        alert("Hello, from the method.");
        setTimeout(self.testMethod, 2000);
    };
}

var myTest = new Test();
myTest.testMethod();