How can visibility properties of HTML elements be controlled dynamically using JavaScript?

To control the visibility properties of HTML elements dynamically using JavaScript, you can use the `style.display` property. Setting `element.style.display = "none"` will hide the element, while setting `element.style.display = "block"` will show it. You can toggle the visibility by checking the current display property and changing it accordingly. ```javascript // Get the element by its ID var element = document.getElementById("elementId"); // Check if the element is currently visible or hidden if (element.style.display === "none") { // Show the element element.style.display = "block"; } else { // Hide the element element.style.display = "none"; } ```