encode/decode base64 with JS

encode,tipjs,base64

Encoding to base64 is done with the btoa command

btoa("This is a test.")
> "VGhpcyBpcyBhIHRlc3Qu"

To decode a base64 encoded string, use the atob command

atob("VGhpcyBpcyBhIHRlc3Qu")
> "This is a test."

Object.keys và Object.getOwnPropertyNames

Getting the last element of a split string array

flatMap()

Extend Object javascript

Đếm có bao nhiêu items giống nhau trong một array