Here are six different ways to hide an element using CSS:

display: none;

.hidden-element {
  display: none;
}

This completely removes the element from the document flow. It won't occupy any space on the webpage.

visibility: hidden;

.hidden-element {
  visibility: hidden;
}

This hides the element, but it still occupies space on the webpage. The element is not visible, but the space it takes up remains.

opacity: 0;

.hidden-element {
  opacity: 0;
}

This hides the element by making it fully transparent. It still occupies space and retains its dimensions but is visually hidden.

height: 0; width: 0; overflow: hidden;

.hidden-element {
  height: 0;
  width: 0;
  overflow: hidden;
}

This hides the element by setting both its height and width to zero. Using overflow: hidden prevents any content from being visible.

clip-path: polygon(0 0, 0 0, 0 0, 0 0);

.hidden-element {
  clip-path: polygon(0 0, 0 0, 0 0, 0 0);
}

This method uses the clip-path property to hide the element by defining a polygon shape with zero area.

clip-path: circle(0);

.hidden-element {
  clip-path: circle(0);
}

This will hide the element by clipping it to a circle with no visible area, essentially making the element invisible.