javascript sub str code example

Example 1: js substring

// the substring method returns a string out of another string

const str = 'Mozilla';

console.log(str.substring(1, 3));
// expected output: "oz"

console.log(str.substring(2));
// expected output: "zilla"

Example 2: javascript how to get middle letters of a string

function extractMiddle(str) {

        var position;
        var length;

        if(str.length % 2 == 1) {
            position = str.length / 2;
            length = 1;
        } else {
            position = str.length / 2 - 1;
            length = 2;
        }

        return str.substring(position, position + length)
    }

    console.log(extractMiddle("handbananna"));