Why doesn't style work for querySelector?

• 0
  Tried both querySelector, both querySelectorAll and getElementsByClassName. But you still can't change the style value.
  
  

  const buttons = document.getElementsByClassName('js-toggle-card');
      for (const button of buttons) {
          button.addEventListener('click', () => {
              let tags__secondaryEl = document.querySelector('tags__secondary');
              tags__secondaryEl.style.display = 'block';
          });
      }

  
  
  This is what the compiler says:
  
  

  JavaScript Quinn Aguirre, Sep 18, 2019

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3 Answers
• 0
  He says so because document.querySelector ('tags__secondary') returned null. That is, he did not find the element
  
  & lt; tags__secondary & gt; on your page.
  
  
  
  Did you mean document.querySelector ('. Tags__secondary')

  Cora Fleming

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• 0

  document.querySelector('.tags__secondary'); // точку в селекторе забыли

  Anonymous

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• 0
  add a dot in the querySelector declaration

  Anonymous

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