Learn JavaScript from scratch by solving over a hundred different coding challenges. Go here for the interactive browser version: https://scrimba.com/learn/learnjavascript ⭐️ Code ⭐️ Two versions: 🔗 Interactive version: https://scrimba.com/learn/learnjavascript 🔗 GitHub repo: https://github.com/scrimba/learn-javascript ✏️ Created by Per Harald Borgen. Per on Twitter: https://twitter.com/perborgen 00:00 Intro 03:41 Passenger counter app 04:39 Setting up file 07:42 Create variable 12:27 Mathematical operations 16:16 Reassigning & incrementing 19:23 Adding button 21:41 onclick event listener 25:10 Using functions to write less code 28:48 First function 29:34 Function that logs sum 32:25 Function that increments 34:23 Increment on clicks 36:35 Display count 41:53 Document Object Model 43:47 Display count w/ innerText 44:30 Create save button 46:40 What is string? 48:16 First string variable 52:00 Log greeting to console 53:18 Strings vs. Numbers Render welcome message Improve message w/ string concatenation Use plus equal for count Create save feature Debugging online Set count to 0 Recap Variables practice Concatenate strings Incrementing & decrementing Strings & numbers Rendering error message Calculator challenge Build Blackjack Game 1:31:27 Build Blackjack game 1:32:27 Add firstCard, secondCard, & sum 1:33:23 If...else conditionals 1:39:08 if...else statement 1:42:05 if/else...if/else statement 1:45:28 if...else statement for our game 1:47:32 hasBlackJack variable 1:49:38 isAlive variable 1:51:27 Practice boolean conditions 1:54:55 Add message variable 1:58:20 Link stylesheet 2:00:56 Add basic styling 2:05:19 Make start button work 2:11:13 Display message 2:13:48 Display sum 2:19:36 Display cards 2:21:34 New card button 2:25:16 Add to sum when newCard is clicked 2:28:36 Rename startGame function 2:30:52 Solving our cards problem w/ array 2:34:12 Arrays intro 2:39:30 Array indexes 2:43:50 Arrays w/ multiple data types 2:46:12 Adding & removing items from arrays 2:50:35 Creating cards array 2:51:43 Push new card to array 2:53:05 Counting 2:57:10 Loops 3:00:37 For loops & arrays 3:04:23 First array-based for loop 3:05:55 For loops, arrays, & DOM 3:08:55 Use loop to render cards 3:11:16 Avoid hard-coding values 3:12:51 Returning values 3:17:54 Use function to set card values 3:21:05 Generating random numbers w/ Math.random() 3:25:24 Math.random() * 6 3:27:11 Flooring number w/ Math.floor() 3:28:40 Create dice 3:30:23 Completing dice function 3:33:04 Make getRandomCard() work 3:36:00 getRandomNumber function 3:39:06 Assign values in startGame function 3:41:52 Card feature is broken 3:42:54 Logical AND operator 3:46:39 Logical operators 3:48:47 logical OR operator 3:51:52 Only trigger newCard() if you're allowed to Object sneak peek Objects Create first object Store player data Methods on object Recap Objects & functions if else Loops & arrays push, pop, unshift, shift challenge Logical operators Rock papers scissors Sorting fruits Build Chrome Extension 4:33:54 Build Chrome Extension 4:38:30 Add button & input tag 4:40:06 Style button & input tag 4:47:28 Make input button work w/ onclick 4:48:49 Refactor to addEventListener 4:51:11 addEventListener() 4:52:58 Refactoring 4:54:25 Create myLeads array & inputEl 4:56:49 Using let & const 5:00:11 Push to myLeads array 5:01:24 Push value from input field 5:03:56 Use for loop to log out leads 5:05:38 Create unordered list 5:07:39 Render leads in unordered list 5:11:22 How to render li elements w/ innerHTML 5:13:01 innerHTML 5:14:34 More innerHTML practice 5:16:26 Render li elements w/ innerHTML 5:17:37 Use createElement() & append() instead of innerHTML 5:21:16 Improving performance of our app 5:24:37 Create render function 5:26:40 Clear input field 5:28:47 Add a tag 5:35:53 Template strings 5:35:54 Write template string 5:36:28 Make template string more dynamic 5:37:12 Template strings on multiple lines 5:41:03 Refactor app to use template string 5:42:19 Style list 5:46:13 Preparing deployment Deploying Chrome Extension What is localStorage? First localStorage Storing arrays in localStorage Save leads Get leads Truthy & falsy values Guess expression: truthy or falsy? Checking localStorage before rendering Style delete button Make delete button work How function parameters can improve our code Write function parameter Functions w/ multiple params Numbers as function params Arguments vs Params Arrays as params Refactor renderLeads() to use parameter Create tabBtn Save tab url Get current tab Use Chrome API to get tab Deploy final version Recap Practice Outro