What do you call a JavaScript function when it has a name

Question

What do you call a JavaScript function when it has a name

This code is confusing to me. It's not the usual JavaScript syntax for a function that I know of. Is this a specific function? Or perhaps it's a callback for when an update event occurs? Apologies for these beginner questions, as I am quite new to JS. I grasp everything else in the code aside from this unfamiliar function syntax foo: function(){}; which appears frequently in an API tutorial I'm currently working through.

updateProgress: function () {    
  $.post('/callback', {
    progress: plnzVideoTracker.progress
  });   
}

javascript function syntax

Answer 1

Answer №1

Looks like you're dealing with an "object method" in your code snippet. To utilize this properly, make sure to enclose the code within an object. Here's an example:

var NewObject = {
  performAction: function () {    
    $.post('/endpoint', {
      data: someData
    });   
  }
}

Inside the object, you can call the method with this.performAction(). Outside of it, you'll need to use NewObject.performAction().

For more information on object literals, check out the MDN Documentation.

Answer 2

Looks like you're dealing with an "object method" in your code snippet. To utilize this properly, make sure to enclose the code within an object. Here's an example:

var NewObject = {
  performAction: function () {    
    $.post('/endpoint', {
      data: someData
    });   
  }
}

Inside the object, you can call the method with this.performAction(). Outside of it, you'll need to use NewObject.performAction().

For more information on object literals, check out the MDN Documentation.

Answer 3

Answer №2

When creating an object literal expression, the key-value pairs are defined as follows:

{
   // properties ...
}

An identifier followed by a colon represents the name of a property in the object, with the corresponding value after the colon:

{
  prop1: value
}

A function expression is structured like this:

function () {
  // function body ...
}

This function expression can be assigned to a variable or property just like any other expression.

For example...

updateProgress: function () {    
  $.post('/callback', {
    progress: plnzVideoTracker.progress
  });   
}

This code snippet is likely part of an object expression that defines a property named updateProgress containing an unnamed function as its value.

Answer 4

When creating an object literal expression, the key-value pairs are defined as follows:

{
   // properties ...
}

An identifier followed by a colon represents the name of a property in the object, with the corresponding value after the colon:

{
  prop1: value
}

A function expression is structured like this:

function () {
  // function body ...
}

This function expression can be assigned to a variable or property just like any other expression.

For example...

updateProgress: function () {    
  $.post('/callback', {
    progress: plnzVideoTracker.progress
  });   
}

This code snippet is likely part of an object expression that defines a property named updateProgress containing an unnamed function as its value.

What do you call a JavaScript function when it has a name

Answer №1

Answer №2

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