encode/decode base64 with JS

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."

kiểm tra email trong javascript

How to combine two sorted arrays into one? We can do this easily with the spread operator.

Sự khác biệt giữa substr() và substring() chức năng trong JS là gì?