The JavaScript Survival Guide 

Who knew a tutorial could be this entertaining :P

"You should respect the legacy of var but never use it." Why do I feel like you're not even being ironic about this.

am i the only one who feels like a child when saying truthy and falsey

I first contracted the JavaScript virus 21 years ago, so I'm not exactly new to it. In under 15 minutes you explained everything I found confusing or contrary. It now makes sense. No longer will I think of JavaScript as quirky and insidious. Thank you!

Never seen a more intense JS tutorial before

Please put a disclaimer that this is not a beginners course, as most beginners would be highly overwhelmed by this (pun not intended).

Glaring typo *Primatives* 🐵 - I am aware, but can't fix it now 😭. Also, primitive constructors should have a `new` keyword. String('foo') is the same as 'foo' (literal syntax), but *new String('foo')* is what I was talking about in the video.

Don't change anything on how you are doing this. Awesome quality content

I might not be first I might not be last but when Fireship posts I make a sandwich and watch it

Fireship is perfect for me. The videos are brief but comprehensive. This makes them interesting. It also makes them perfect as refreshers. I also get to learn so many new things with every video.

Great and extraordinary presented knowledge in just 15 minutes. Wow! Keep going! Just suggestion, I noticed that you are really good at using chrome developer tools can you make a video series about that maybe at some point in future?

In a nut shell js is intuitive and crazy at the same time.

man you talk so fast, i had to check the playback speed lol

its nice to watch this kind of video when u're not in ur desk, resting, and just wondering about the world.

The relationship between predators and prey is often described as the balance of nature. While we must survive from the JS and its mutations - frameworks, it must survive from WA itself..

Hey brother, I would like to thank you so much for the amazing ways you explain complex things, I hope you can come up with fast tutorial for lodash library of JavaScrip, I've just started learning machine learning with javaScript, so that library is very important to mastery its functions to use them for converting maths algorithms to javaScript codes.

Your videos are awesome! Even some experienced devs can learn from them. Do you happen to learn something when you are making these videos or are you some kind of god that already knew all of this beforehand?

I'm blown away by how high quality this channel is !

playback speed > custom > 0.85

Great video, but you misspoke when it comes to logical-and and logical-or operators. Both operators incorporate a short-circuit logic and can return the object itself. For example: 0 && 1 returns 0, and 1 && 2 return 2, not actually returning true or false.

I feel like JS is the Doge of programming languages, a meme at first but ended up becoming super popular 😂

Great stuff man! Would've been great if you touched on how the behaviour of hoisting compares with the traditional var keyword and the let and const keywords, specifically with regards to the "temporal deadzone". As a bonus, briefly touch on how mutating objects and array key value pairs affects references to those objects in memory - this still trips me up.

i thought... "ou wow... a compact javascript course in just round about 15minutes, nice" then i checked the playing speed of the video, and after that i reduced it to (in my opinion) normal speed... i finished it just yesterday, 8 Month later 😆👍

Like so people can see this! 0:00 Intro 0:53 Chapter 1: How to run JS code 2:20 Chapter 2: Primatives and Objects 3:57 Chapter 3: Control Flow - Truthy Falsy 6:38 Chapter 4: Variables 8:01 Hoisting 9:19 Chapter 5: Functions 10:11 Higher Order Functions 11:58 Chapter 6: Objects 12:38 What the hell is THIS?!?! 14:10 Outro

The worst part is when you get to maintain a legacy code that you discover that the last developer scattered js across dozens of files, following zero patterns and mixing dozens of libraries that does almost nothing. I swear to God if I find that dude ever again I will go to jail

This is easily the most helpful JS video Ive seen. Many of the concepts Ive been struggling with you touched on, and none of the other JS videos Ive seen even cover JS structure like you do. Thank you for your work.

10:40 "a closure is a function within a function" No, it's not that. A closure is a context within a context, it had nothing to do with functions. Apart from that small mistake, very good JS introduction 👍

Fantastic video! Also that "A Few Good Men" reference was perfect 👌

A request for Survival guide for Python !!

The perfect video for a JS interview. Nice stuff.

"Some people call javascript a virus".. what a start hahahahahah

Js is crazy! frequently catch myself thinking: whats is going on here?! mostly is the async stuff, this video more than anything has teach me to take it easy - it's not just me, there is a lot of people trying to make sense out of it... let's laugh about it😁

My problem with JavaScript is I just finished the first class and I just started to feel like I was getting the hang of it a little bit just a tiny little bit and then the next class was a new version of Travis good which with a bunch of changes why why why why

Everything was very basic, and I started to feel bored as nothing new was said, but then suddenly at end I was hit with a surprise by learning that function vs arrow syntax differs in what "this" becomes. Why is this (the thoughts behind making it so), and how is it (how it actually works to result in it)?

please put English subtitles on these videos

Sir Could you please make a video explaining the resources you use to learn or enhance your programming skills

The price tag on Quokka.... LOL! Are they insane?

The times when I used JavaScript I mainly used Canvas API because making games is what's always got me interested.

I usually watch everything in at least 2x speed (more often than not around 2.5x). Today I had to watch this video in 0.75x the speed and keep going back and rewatching parts lol. The variables and functions parts were too many new and complex stuff for me (even with all the similarities to Python and C#, which are languages I have studied and used before). Amazing! Quite fun and different way to explain things, thank you!

10:40 "Closures" and 12:40 "this". Very well explained 👍. Thank you 🙏.

What (extension?) Are you running to get the terminal toolbar in your interface like that?

This man going to be big

I've been writing Javascript for over 9 months so I understand most of the stuff explained in these 3 videos, yet I can not stop watching they are gold. Entertaining and now I understand things that we're blurry in my head or I did not understand at all. Your channel is a gold mine. Keep it up!

A bit of extra information regarding the logical operators, like `||` (logical or), and `&&` (logical and). They check for truthiness between both values and return either the left or right, depending on the condition. This does not guarantee to return a boolean value, if either of the values aren't boolean. For example, if you're comparing, say, a string value to undefined, if the string is empty, the logical or will always return 'undefined', if the string is not empty, it will return the string. If you expect the value to always be a boolean value, either add a double bang (!!) in front of your expression, or use tenary operators, which can be more readable and easier to understand the outcome of.

Fireship and Honeypot are actual entertaining RU-vid channels for developers... Massive respect for all the effort you put in the process of generating such content ❤️🚀

and here I thought I knew javascript.

Bro this is the best coding channel I learn a lot in a really entertaining way. This makes me think University is truly dead

In French, "this" is often said "ça", when translating back to English it becomes... IT 😱🤡🔥

Terrific video; there is so much JavaScript condensed into a quick 15min video! One nitpick though... it’s spelled “primitive” not “primative”. 😉

After listening so many "this" puns I just keep laughing every time I hear this😂

Serious question: did you get all he said? Or you needed to slow down the videos? I love this channel but man, I really wished he slowed down.

4:36 you omitted an important detail, *NaN is falsy!* So if you have code that expects ANY number value, you must be prepared to deal with NaN, and never confuse NaN with 0 (except when doing bitwise ops, that's not bad). JS also strictly follows the IEEE-754 float standard, which means there's also *negative zero* but you shouldn't worry too much about it unless you're writing polyfills for the Math standard library object

console.log(video) {isGood: true}

You are the Web Developer Survival Channel!

I want the truth! You can't handle the truth! lmao~~~

im gonna watch this video every morning, when you compared closure and object oriented, you won a medal, and + 1000xp

Dude! You really make the best videos! This is awesome !

Step one: dont create webapps to begin with.

2:10 is it just me who hears the voice sound different

BAD HTML PRACTICE! Script tags should be located at the bottom of the file for best performance

Hi. Please, what is the name of the VS Code extension that ads visual information to help in the code. I mean, like the green square when the code runs, or the red square when the code has a problem. Do you use one extension in particular?

First time I understood closures 😂 Thank youuuuu 🙏🏻

Always watch fireship videos in 0.75x Speed

U know too much ...

What font is he using?

JS is not a real programming language, it's like a children's toy, that people are forced to use

this is awesome well, apart from "this"

Somebody: "I hate your style of teaching for free on the internet" Fireship: *Hearted*

what theme are you using for vscode ?

Awesome video. Clear, concise, and informative, from your words to what you chose to display onscreen. I've been balls deep in Ruby on Rails for the last couple of weeks, and watching this really helped getting my JS brain to wake up. I'm looking forward to checking out more of your content.

Finally things I can use that aren't elementary! Thanks!

I have no words to describe how amazing this video is. Thank you so much for making this art piece.

Very useful and amazingly explained thanks a lot!!! #YourNo1Fan

As a final year computer science student, I somehow avoided JavaScript for years. But recently, I was forced to write JavaScript for the first time in my life... I will never be the same again...

how to get emoji in VS Code?

Javascript, never heard of it...said no-one ever

I'm pretty 'primitive' when it comes to this topic so either spelling works for me! Thanks Jeff! I really appreciate this beginner, back-to-basics course on JS. Love'n it mate!

I never imagined I will binge watch programming tutorial

Step 1: use TypeScript

Amazing video, all i learned in a month by myselft on 15 fcking minutes🤣. Thanks a lot 🙏🏻🙏🏻💻

3:53 But that's not the same as for arrays, where new Array(100), if I want an Array of lenght 100 is afaik even more performant, than bracket notation (even if there's more tokens to parse)

Primatives... Primatives... Hmm, no I don't think that's quite right.

have a google interview in 30 minutes. need to learn javascript real quick :)

People keep saying Javascript is weird and nightmarish,but honestly I know almost everything about it and understand it really well aside from module stuff and sometimes forgetting which method did what, but I do understand it so idk why people are so scared of it lmaoo

I hope u will make a JS tutorial soon

I love you man

Very good job! I'd recommend this video for higher than beginner JS programers or for programers coming from other languages. 🙂

Abcd

I've just been watching random JS videos from Fireship, and I just realized I'm 3 episodes into a series. I"M ALREADY LOST BOYS, JAVASCRIPT HAS WON. CARRY ON WITHOUT ME.

Thank you. I *finally* actually understand what a closure is.

Thank you I was sick of finding beginners only tutorials

primatives

JS is fun and easy to understand. You don't actually need a Survival Guide. Just use common sense.

You rock Fireship!....learning curve is smooth...your videos are helful

I had a lot of doubts regarding these things in JavaScript. Thanks for making this video. Now I have some idea about it. 😅

Fireship👑you're a fucking Legend for this!✨👍Thanks for showing the pitfalls and mine-fields of this language with a brainfuck history. #Javascript🚀

Isn’t it “primitive” not “primative”?

JavaScript is so confusing... I think I'll go back to C#

You explain in 14:46 Minute video what people takes 5 to 6 hours. Big Fan Fireship. Entertainment + Knowledge. Wish This video could be 1 hour long.

another thing that is still relevant undefined === void 0 Babel will convert this to support older browsers *cough*SAFARI*cough*