I have this method:
var stopwatch = function () {
this.start = function () {
(...)
};
this.stop = function() {
(...)
};
};
When I try to invoke it:
stopwatch.start();
I am getting Uncaught TypeError: Object (here is my function) has no method 'start'. What am I doing wrong?
You are assigning functions to this.start and this.stop when the function stopwatch is run and never running that function.
It looks like you want a constructor function, with some prototypes.
// By convention, constructor functions have names beginning with a capital letter
function Stopwatch () {
/* initialisation time logic */
}
Stopwatch.prototype.stop = function () { };
Stopwatch.prototype.start = function () { };
// Create an instance
var my_stopwatch = new Stopwatch();
my_stopwatch.start();
Why not just do new stopwatch().start()?
You need to call the start function as like this,
var obj = new stopwatch();
obj.start();
You can create an instance of that method and access the start function.
You need to create a new object first, only then you can call functions on it:
var stopwatch = function () {
this.start = function () {
console.log('test');
};
this.stop = function () {
};
};
var s = new stopwatch();
s.start();
