JavaScript Fundamentals

2.1 Hello World

• no need to use type="text/javascript"
• /pathname is absolute
• pathname is relative

2.2 Code Structure

• semicolon ; at the end of each statement

2.3 The modern mode, "use strict"

• "use strict" to enable newer features and allow old code to work still
• "use strict" is best at the top of a .js page
• not needed when using classes and modules

2.4 Variables

• Cannot declare let or const without assigning a value at the same time
• uppercase const for hard-coded, already known values, eg months, colours