Call function with function parameter

[Ani minadze]

hii ,

i want to call function with function parameter …

if ( bool ) {
  myfunc('right');
}
else {
  myfunc('left');
}
function myFunc(param){
  var right = function(){
    return 'right';
  }
  var left = function(){
    return 'left';
  }
  param.call(param);
}

how can i do that? :( i dont want to use if else statement

[Alen]

var bool = false;

if ( bool ) {
  myFunction('left');
}
else {
  myFunction('right');
}

function left() {
  console.log('left');
}

function right() {
  console.log('right');
}

function myFunction( func ) {
  var fn = window[func];
  if ( typeof fn === 'function' ) {
    fn();
  }
}

[Ani minadze]

thank you for answer.
can you explain what are window[func] function?

[Alen]

@cutecoder

The window represents the JavaScript window object. It’s the global scope for all the JavaScript code that runs in the browser.

Function left, right and myFunction are all in global space. Essentially it’s this:

window.left(), window.right() etc…

function myFunction( func ) {
  // assign variable fn to window object
  var fn = window[func];
  // at this point fn = window.right
  // we then check if the window.right is a function
  if ( typeof fn === 'function' ) {
    // if so run it
    fn();
  }
}

Hope that helps.
Alen

[Author]

Posts