Describe to me what this javascript function is doing please.

function commonElements(arr1, arr2) {
    let i=0;
    let j=0;
    let commonElements = [];
    while (i < arr1.length && j < arr2.length) {
        if (arr1[i] == arr2[j]) {
            commonElements.push(arr1[i]);
            i++;
            j++;
        } 
        else if (arr1[i] > arr2[j]) j++;
        else i++;
    }
    return commonElements;
}
system
mujhe bataaen ki yah javascript fnction kripaya kya kar rahaa he.

fnction komanlements (ARR1, ARR2) {
    aaie main = 0;
    let je = 0;
    saamanyataayen = [];
    jabaki (i <arr1.length && j <arr2.length) {
        if (arr1 [i] == arr2 [j]) {
            commenelements.push (arr1 [i]);
            i ++;
            je ++;
        }
        or agar (arr1 [i]> arr2 [j]) j ++;
        or main ++;
    }
    saamanyata lauten;
}
user
pradaan kiya gaya fnction do saraniyon main parameter ke rup main letaa he or ek sarani detaa he jisamen sabhi tatv hote hai jo donon saraniyon main aam hai.udhaaharan ke liye, yadi aapane [1,2,3,4,5,6,7] or [3,5,77,8,9,10] se yukt saraniyon ko pradaan kiya he, to fnction ek sarani ko waapas kar degaa [[parinamswaroop 3,5,7].
assistant
<|system|>
</s>
<|user|>
mujhe bataaen ki yah javascript fnction kripaya kya kar rahaa he.

fnction komanlements (ARR1, ARR2) {
    aaie main = 0;
    let je = 0;
    saamanyataayen = [];
    jabaki (i <arr1.length && j <arr2.length) {
        if (arr1 [i] == arr2 [j]) {
            commenelements.push (arr1 [i]);
            i ++;
            je ++;
        }
        or agar (arr1 [i]> arr2 [j]) j ++;
        or main ++;
    }
    saamanyata lauten;
}</s>
<|assistant|>
pradaan kiya gaya fnction do saraniyon main parameter ke rup main letaa he or ek sarani detaa he jisamen sabhi tatv hote hai jo donon saraniyon main aam hai.udhaaharan ke liye, yadi aapane [1,2,3,4,5,6,7] or [3,5,77,8,9,10] se yukt saraniyon ko pradaan kiya he, to fnction ek sarani ko waapas kar degaa [[parinamswaroop 3,5,7].</s>
