Javascript

Definition

A high-level programming language, so it’s accessible. Follows the ECMAScript standard. Some key features: Dynamic typing, Use of Prototypes for Objects, Functions can be Variables

Info

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JS is hell by the way

Data: Numbers, Booleans, Strings

• Arithmetic operations: +, -, *, /, %. Supports parenthesis () for priority-setting.
• Boolean true | false
• Strings can be created with ' or "
• Concatenation: "Wow " + "that's crazy." | "Numbers 6, 7, " + 8 + 9 | "Hi pls " + ["be in", "order", "!?"]

Logic

• “Not” this, or check if nonexistent → !false, !data
• Conditions: ===, !==, <, >, <=, >=
• Null
• Undefined → is a value, but it also means there’s no other value
• Falsy → false, undefined, NaN, null, 0, "",

Objects

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Built-in Functions

• .substring(0, 7); → specified section of a string
• .charAt(2); → char in a string at particular pos
• .length; → length

Reminders

• Statements are terminated with ; but this is not strictly enforced. Do it anyway.
• == invokes type coercion.
• "0" is truthy.
• Not declaring a variable with var makes it declare globally.

Game Development

Used in the Past

Ct.js - not using this again, does not warrant a page.

Javascript Libraries

• React
• Vue
• Angular
• Svelte