Javascript : Zero padding in string

Question

How to use zero padding in string which is combined with another character? I search for some example but they just show me string in number format.

For Example :

"000001" //Only number withount any character

I need zero padding for combined character

For example :

ABC000001 //This is inital value

Then I do a operation to incrase the initial value. So it will be :

ABC000002

But when I reach "ABC000009". The result must be "ABC000010".

Any answer would be appreciated

Possible duplicate of [How can I pad a value with leading zeros?](https://stackoverflow.com/questions/1267283/how-can-i-pad-a-value-with-leading-zeros) — coudy.one, Jun 05 '18 at 11:54

Nina Scholz · Answer 1 · 2018-06-05T12:07:29.223

2

You could

separate the string in some characters and digits at the right side,
add a value,
pad the string and
return a new string with all parts.

function add(string, value) {
    var [c, d] = string.match(/^(.*?)(\d+)$/).slice(1);
    
    return c + (+d + value).toString().padStart(d.length, '0');
}

console.log(add('ABC000001', 1));
console.log(add('A0BC00001', 1));

edited Jun 05 '18 at 12:07

answered Jun 05 '18 at 12:00

Nina Scholz

376,160
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score 1 · Accepted Answer · answered Jun 05 '18 at 12:03

1

let current = Number('ABC000001'.substring(3));
current++;
let zeroString = 'ABC00000';
zeroString.substring(0, 8 - current.toString().length) + current;

First line gets the current number by removing leading string,
Second line increments it,
Third has declaration of wanted string format,
Forth line is creating a new string in required format.

answered Jun 05 '18 at 12:03

Milan Živković

106
8

If this answer helped you solve your problem please mark it as the answer to your question. – Milan Živković Jun 06 '18 at 07:31

Javascript : Zero padding in string

2 Answers2