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Last active July 11, 2016 13:36
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intro_to_js.md
<style type="text/css"> section, p, h1, h2, h3 { text-align: left; } </style>

Intro to JS

Write, mentally evaluate, and store the result of JS expressions

Success Criteria

  • Why JavaScript?
  • Running JavaScript
  • Types
  • Operators
  • Console.log

Why learn JavaScript?

  • Only full stack web application language (Isomorphic)
  • Only dynamic language natively supported by the browsers
  • It is required
  • Sustained adoption
  • Low barrier to entry

What is JavaScript?

History

  • When was JavaScript created?
  • What is ECMAScript?
  • What is TC39?
  • How many versions of JS has there been?
  • Developed in 10 days in 1995 by Brendan Eich while working for Netscape.
  • ECMAScript Language Specification
  • Technical Committee 39 published the final draft of the 5th edition

Types in JavaScript

A must: wat

Types in JavaScript

  • string
  • number
  • boolean
  • null
  • undefined
  • object

Variables

  • var

Operators

Assignment

  • =
  • +=

Comparison

  • ==
  • ===
  • >
  • >=
  • !

Arithmetic

  • +
  • -

Logical

  • ||
  • &&

Bitwise

Ternary

condition ? val1 : val2

typeof

Relational

  • in
  • instanceof

Operator Precedence

Console.log

Review

  • Why JavaScript?
  • Running JavaScript
  • Types
  • Operators
  • Console.log
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