How to replace some preceding characters with a constant 4 asterisks and display the last 3 as well - JavaScript?

Let’s say the following are our values −

'6778922' '76633 56 1443' '8888 4532 3232 9999'

We want the preceding characters to be replaced with 4 asterisks and the display rest of the last 3 characters. The output should be −

**** 922 **** 443 **** 999

For such conditions, use the replace() and set regex in it.

Example

Following is the code −

const hideDataWithDot = value => value.replace(/.+(.{3})$/, "**** $1"); console.log(hideDataWithDot('6778922')) console.log(hideDataWithDot('76633 56 1443')) console.log(hideDataWithDot('8888 4532 3232 9999')) 

To run the above program, use the following command −

node fileName.js. 

Here, my file name is demo236.js.

Output

The output is as follows −

PS C:\Users\Amit\javascript-code> node demo236.js **** 922 **** 443 **** 999