how to create modal boxes in html css code example

Example 1: modal pop up html css

<button class="trigger">Click here to trigger the modal!</button>
    <div class="modal">
        <div class="modal-content">
            <span class="close-button">×</span>
            <h1>Hello, I am a modal!</h1>
        </div>
    </div>

Example 2: modal pop up html css

var modal = document.querySelector(".modal");
    var trigger = document.querySelector(".trigger");
    var closeButton = document.querySelector(".close-button");

    function toggleModal() {
        modal.classList.toggle("show-modal");
    }

    function windowOnClick(event) {
        if (event.target === modal) {
            toggleModal();
        }
    }

    trigger.addEventListener("click", toggleModal);
    closeButton.addEventListener("click", toggleModal);
    window.addEventListener("click", windowOnClick);