Typescript: padStart & padEnd string function

Here we demonstrate masking all digits of credit card

number except last four using padStart().

secondly we will add '...' to 'Read More' at the end u

sing padEnd()

Code:

var cc ="1234567867897890"

var lastFour = cc.slice(-4)

var length = cc.length

console.log(length)

console.log(lastFour)

var masked = lastFour.padStart(length,"*")

console.log(masked)//**** **** **** 7890

var str ="Read More"

var newlength = str.length + 3

var newstr = str.padEnd(newlength,'.')

console.log(newstr)//Read More...

Output:

16

7890

************7890

Read More...