Support for Multiple Modal Single Page

问题:

I'm trying to use some sample code form w3schools.com to include multiple modals on a single page. I've included the code that I'm trying to use below. I got the code from here. http://www.w3schools.com/howto/howto_css_modals.asp

Here is an example of the code in action. Note that the first Modal works, but the second Modal does not appear. https://jsfiddle.net/y0uavmo0/

HTML:

<h2>Modal Example1</h2>

<!-- Trigger/Open The Modal -->
<button id="myBtn">Open Modal1</button>

<!-- The Modal -->
<div id="myModal" class="modal">

  <!-- Modal content -->
  <div class="modal-content">
    <span class="close">×</span>
    <p>Some text in the Modal..1</p>
  </div>

</div>


<h2>Modal Example2</h2>

<!-- Trigger/Open The Modal -->
<button id="myBtn">Open Modal2</button>

<!-- The Modal -->
<div id="myModal2" class="modal">

  <!-- Modal content -->
  <div class="modal2-content">
    <span class="close">×</span>
    <p>Some text in the Modal..2</p>
  </div>
</div>

JS:

// Get the modal
var modal = document.getElementById('myModal');

// Get the button that opens the modal
var btn = document.getElementById("myBtn");


// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];

// When the user clicks the button, open the modal 
btn.onclick = function() {
    modal.style.display = "block";
}

// When the user clicks on <span> (x), close the modal
span.onclick = function() {
    modal.style.display = "none";
}

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
    if (event.target == modal) {
    modal.style.display = "none";
    }
}
</script>

回答1:

You are referring both the buttons with same id. So event is only bind for the first button as it is appearing first in the DOM.

If you will change the JS code like below

// Get the modal
var modal = document.getElementsByClassName('modal');

// Get the button that opens the modal
var btn = document.getElementsByClassName("myBtn");


// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close");

// When the user clicks the button, open the modal 
btn[0].onclick = function() {
    modal[0].style.display = "block";
}

btn[1].onclick = function() {
    modal[1].style.display = "block";
}
// When the user clicks on <span> (x), close the modal
span[0].onclick = function() {
    modal[0].style.display = "none";
}

span[1].onclick = function() {
    modal[1].style.display = "none";
}
// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
    if (event.target == modal) {
        modal.style.display = "none";
    }
}

and Html code like

<h2>Modal Example1</h2>

<!-- Trigger/Open The Modal -->
<button id="myBtn" class="myBtn">Open Modal1</button>

<!-- The Modal -->
<div id="myModal" class="modal">

  <!-- Modal content -->
  <div class="modal-content">
    <span class="close">×</span>
    <p>Some text in the Modal..1</p>
  </div>

</div>


<h2>Modal Example2</h2>

<!-- Trigger/Open The Modal -->
<button id="myBtn" class="myBtn">Open Modal2</button>

<!-- The Modal -->
<div id="myModal2" class="modal">

  <!-- Modal content -->
  <div class="modal2-content">
    <span class="close">×</span>
    <p>Some text in the Modal..2</p>
  </div>

</div>

This will start working. though you will have some css issues in your modal 2.