JavaScript

JavaScript is an obligatory programming language for anyone who wants to code for the Web since all browsers implement it.

• JS Foundation

Basics

• When you pass an argument into a function, you’re passing the reference in memory. so if you pass an object or an array they will get changed directly. It won’t do that with other typeofs like number or string.

• Inside a function, if you are going to use a variable, you have to declare it with var, otherwise it would use a global variable with the same name, and that can insert bugs into the whole javascript code.

• All numbers in JavaScript are 64bit floating point numbers

Load script on document ready

document.addEventListener("DOMContentLoaded", function(event) { 
    //Do work
});

Presentation tools

• Spectacle code slide by theJamesKyle

Managing currency

• store currency in cents to avoid floating point problems

Charts

libraries

• Chartist for pie, lines, bars
• Cytoscape for graphs

Learning resources

• progressive web apps by Google

Bundling tools

• parceljs - zero config
• rollup - for libraries
• webpack - for web apps

Web development

How to speed up web development?

• CodePen experience with live reload
• Decrease devOps time
• Decrease tool setup time
• Use type checking to enable task automation
• Use type checking to avoid missing case handling
• Enforce unit test coverage
• Leverage GUI for UI development
• Add codemods
• Increase Human-friendly feedback
• Increase AI assistance
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