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JavaScript JavaScript and the DOM (Retiring) Making Changes to the DOM Styling Elements

Italo Oliveira
Italo Oliveira
4,289 Points
Posted by Italo Oliveira
Italo Oliveira
4,289 Points

The code doesn't work when I try to make simplify my code.

I can't understand why my code (the button) doesn't work when I write it in another way trying to simplify it:

toggleList.addEventListener('click', () => { let listDisplay = listDiv.style.display; let buttonName = toggleList.innerHTML; if (listDisplay == 'none') { buttonName = 'Hide list'; listDisplay = 'block'; } else { buttonName = 'Show list'; listDisplay = 'none'; }});

1 Answer

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

When you assign a variable with an element property, the variable stores the value of the property, not a reference to it. So later, if you change what is in the variable, it will not affect the property of the element or what is shown on the page.

You didn't show the "before" code, but I'd bet originally it was making changes directly to the element properties.