JAVASCRIPT

modal javascript example

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

javascript custom modal

Swal.fire({
  icon: 'error',
  title: 'Oops...',
  text: 'Something went wrong!',
  footer: '<a href="">Why do I have this issue?</a>'
})

this is javascript cdn put this code in your html body section ending the body section 
<script src="//cdn.jsdelivr.net/npm/sweetalert2@11"></script>

how to create modal popup in javascript

<script src="//cdn.jsdelivr.net/npm/sweetalert2@11"></script>
<script>
  Swal.fire(
  'Good job!',
  'You clicked the button!',
  'success'
)
</script>