具有参数功能的JavaScript问题

Question

I have a little problem with my function. When I try to run my function with parameter, it fails. I tried:

• function(a4)
• function('a4')
• function("a4")

and nothing works :( I don't know where is my problem. I want to create a function because my code is repeating 10 times, so I would like to switch only a function parameter. Please, help!

This function works:

function zmien_dane() {                       
             const silnik = document.querySelector('#dane'); 
             var zawartosc = silnik.dataset.a4;
             document.getElementById("dane").innerHTML = zawartosc;
             const spalanie = document.querySelector('#dane2');
             var zawartosc = spalanie.dataset.a4;
             document.getElementById("dane2").innerHTML = zawartosc;
             const skrzynia = document.querySelector('#dane3');
             var zawartosc = skrzynia.dataset.a4;
             document.getElementById("dane3").innerHTML = zawartosc;
             const nadwozie = document.querySelector('#dane4');
             var zawartosc = nadwozie.dataset.a4;
             document.getElementById("dane4").innerHTML = zawartosc;
}

This function doesn't work:

function zmien_dane(parameter) {                         
             const silnik = document.querySelector('#dane');
             var zawartosc = silnik.dataset.parameter;
             document.getElementById("dane").innerHTML = zawartosc;
             const spalanie = document.querySelector('#dane2');
             var zawartosc = spalanie.dataset.parameter;
             document.getElementById("dane2").innerHTML = zawartosc;
             const skrzynia = document.querySelector('#dane3');
             var zawartosc = skrzynia.dataset.parameter;
             document.getElementById("dane3").innerHTML = zawartosc;
             const nadwozie = document.querySelector('#dane4');
             var zawartosc = nadwozie.dataset.parameter;
             document.getElementById("dane4").innerHTML = zawartosc;
}

Answer 1

You may need to use square bracket like this

silnik.dataset[parameter];

Check this link