• Monday , 13 July 2020

Immediately Invoked Function Expression – Beau teaches JavaScript

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An Immediately Invoked Function Expression (IIFE) is a JavaScript function that runs as soon as it is defined.

💻 Code: http://codepen.io/beaucarnes/pen/KWOrJO?editors=0010

🔗 Resource: https://en.wikipedia.org/wiki/Immediately-invoked_function_expression

🐦 Beau Carnes on Twitter: https://twitter.com/carnesbeau

⭐JavaScript Tutorials Playlists⭐
▶JavaScript Basics: https://www.youtube.com/playlist?list=PLWKjhJtqVAbk2qRZtWSzCIN38JC_NdhW5
▶Data Structures and Algorithms: https://www.youtube.com/playlist?list=PLWKjhJtqVAbkso-IbgiiP48n-O-JQA9PJ
▶Design Patterns: https://www.youtube.com/playlist?list=PLWKjhJtqVAbnZtkAI3BqcYxKnfWn_C704
▶ES6: https://www.youtube.com/playlist?list=PLWKjhJtqVAbljtmmeS0c-CEl2LdE-eR_F
▶Clean Code: https://www.youtube.com/playlist?list=PLWKjhJtqVAbkK24EaPurzMq0-kw5U9pJh

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  1. Martin Bozinovski
    May 31, 2019 at 18:29

    var a = 2;

    function foo() {

    var a = 3





    This is different from the thing you said. It is because of es6?

  2. Oybek Toshmatov
    May 31, 2019 at 18:29

    well explained!

  3. Harmanpreet Bhatti
    May 31, 2019 at 18:29

    I think all the variables defined using 'var' are function scope in ES5 not global scope as you said @3:17

  4. Haudz
    May 31, 2019 at 18:29

    Is the video being slightly fast-forwarded while he types?

  5. gigicaly
    May 31, 2019 at 18:29

    what is that js compiler you are using?

  6. little big big
    May 31, 2019 at 18:29

    wow. normally when i watch JS videos on youtube, i don't understand what is happening at all. but i actually understand this video. this is amazing.

  7. Naz Khan
    May 31, 2019 at 18:29

    Dude your videos are awesome. Question for you – with ES6, do we need to use IIFE much anymore if at all?

    May 31, 2019 at 18:29

    Always wondered what this was for….. Could you make a video on 'use strict';? Thanks

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