Tools

# Tools

Falsy List

• 0/ -0/0n
• empty strings
• null|
• undefined
• NaN
• document.all

All other values are truthy.

typeof Table

Type	Expression	Result
Undefined	typeof undefined	"undefined"
Null (Object)	typeof null	"object"
Boolean	typeof true	"boolean"
Number	typeof 0	"number"
BigInt	typeof 0n	"bigint"
String	typeof "test"	"string"
Symbol	typeof	"symbol"
Function	typeof console.log	"function"
Any other object	...	"object"

URL

HTTP Request Methods

• GET: Retrieve resource
• POST: Create a new resource
• PUT: Update an already existing resource
• PATCH: Partly update an already existing resource (e.g. only sending the first name if only this field is modified)
• DELETE: Delete a resource