Why does my JS function only manipulate one that is assigned to the class instead of all?

I have this JS function that is supposed to initially hide a that has the class name "tw" and when clicked on a button it should make it visible. However, whenever I click the button it only changes the visibility of one div. I have 4. How can I fix this?

 function myFunction(){
      var elms = document.getElementsByClassName("tw");
     Array.from(elms).forEach((x) => {
        if (x.style.display === "block") {
          x.style.display = "none";
        } else {
          x.style.display = "block";
        }
      })
    }

https://jsfiddle.net/qm8bxryh/307/ Here's the fiddle

Via Active questions tagged javascript - Stack Overflow https://ift.tt/2FdjaAW

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