Passing a function with arguments as an argument?

Question

Is it possible to pass a javascript function with arguments as an argument?

Example:

$(edit_link).click( changeViewMode( myvar ) );

Answer 1

Use a "closure":

$(edit_link).click(function(){ return changeViewMode(myvar); });

This creates an anonymous temporary function wrapper that knows about the parameter and passes it to the actual callback implementation.

Answer 2

Yes, like this:

$(edit_link).click(function() { changeViewMode(myvar) });

Answer 3

No, but you can pass one without parameters, and do this:

$(edit_link).click(
  function() { changeViewMode(myvar); }
);

So you're passing an anonymous function with no parameters, that function then calls your parameterized function with the variable in the closure

Answer 4

You can do this

var message  = 'Hello World';

var callback = function(){
alert(this)
}.bind(message);

and then

function activate(callback){
  callback && callback();
}

activate(callback);

Or if your callback contains more flexible logic you can pass object.

Demo

Answer 5

Or if you are using es6 you should be able to use an arrow function

$(edit_link).click(() => changeViewMode(myvar));

Answer 6

This is an example following Ferdinand Beyer's approach:

function function1()
{
    function2(function () { function3("parameter value"); });
}
function function2(functionToBindOnClick)
{
    $(".myButton").click(functionToBindOnClick);
}
function function3(message) { alert(message); }

In this example the "parameter value" is passed from function1 to function3 through function2 using a function wrap.

Answer 7

Use Function.prototype.bind(). Quoting MDN:

The bind() method creates a new function that, when called, has its this keyword set to the provided value, with a given sequence of arguments preceding any provided when the new function is called.

It is supported by all major browsers, including IE9+.

Your code should look like this:

$(edit_link).click(changeViewMode.bind(null, myvar));

Side note: I assume you are in global context, i.e. this variable is window; otherwise use this instead of null.