The error is Uncaught TypeError: Cannot read properties of undefined (reading 'style')

Code:

let slideIndex = 0;
showSlides();

function showSlides() {
  let i;
  let slides = document.getElementsByClassName("mySlides");
  let dots = document.getElementsByClassName("dot");
  for (i = 0; i < slides.length; i  ) {
    slides[i].style.display = "none";  
  }
  slideIndex  ;
  if (slideIndex > slides.length) {slideIndex = 1}    
  for (i = 0; i < dots.length; i  ) {
    dots[i].className = dots[i].className.replace(" active", "");
  }
  slides[slideIndex-1].style.display = "block";   //Error is showed at this line  
  dots[slideIndex-1].className  = " active";
  setTimeout(showSlides, 2000); // Change image every 2 seconds
}

I included my script tag in index.html of public folder Rest javascript files are working except this

CodePudding user response：

const mystyle = { display: "block", };

CodePudding user response：

const mystyle = { display: "block", };

  const mystyle = {
    display: "block",
  };

  <div className="Works" style={slideIndex == 0 ? mystyle : null}></div>