7 examples of 'javascript add leading zeros' in JavaScript

30
function addZeros (block) {
31
    if (block === '') {
32
        return '0';
33
    } else {
34
        return block;
35
    }
36
}

4
function addZeros(i, zeros) {
5
    if (zeros === undefined) {
6
        zeros = 3;
7
    }
8
    var s = i.toString();
9
    while (s.length < zeros)
10
    {
11
        s = '0' + s;
12
    }
13
    return s;
14
}

49
function addZeros(value, len) {
50
	value = "" + value;
51
52
	if (value.length < len) {
53
		for (var i=0; i<(len-value.length); i++)
54
			value = "0" + value;
55
	}
56
57
	return value;
58
};

5
function addZeros(n, l){
6
    n = n.toString();
7
    while(n.length < l){
8
        n = '0' + n;
9
    }
10
    return n;
11
}

6
function addZeros(str, targetLength = 2) {
7
    while (str.length < targetLength) {
8
        str = `0${str}`
9
    }
10
11
    return str
12
}

150
function addLeadingZero(input, index) {
151
	return input.slice(0, index) + '0' + input.slice(index);
152
}

17
function addLeadingZeroes(num) {
18
    return (num > 9 ? '' : '0') + num;
19
}