[FIXED] How to open a Bootstrap modal without jQuery or bootstrap.js javascript?

Issue

I'm working on a VERY LIGHT survey application. This application runs in third world countries in locations with very limited connection.

We found that the loading-time is proportional to user Engagement (Very important to us).

Today I'm using 2 libs - VueJS and a custom bootstrap build. I would like to invoke a modal. But the modal requires to add the Bootstrap Javascript and the jQuery. those libs almost doubles the loading time.

How can I open a modal without adding those two libs?

Solution

@uday's link to CSS only modal is a nice trick, but might be awkward to use if you use #tag's for other purposes (eg, Routing & param passing).

So here is an example that uses very little JS to achieve something very similar. I've tried to keep the Snippet as small as possible so that it's easy to see what's happening.

var modal = document.querySelector(".modal");
var container = modal.querySelector(".container");

document.querySelector("button").addEventListener("click", function (e) {
  modal.classList.remove("hidden")
});

document.querySelector(".modal").addEventListener("click", function (e) {
  if (e.target !== modal && e.target !== container) return;     
  modal.classList.add("hidden");
});

.modal {
  background-color: rgba(0,0,0,0.4); /* Transparent dimmed overlay */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: table;
}

.modal.hidden {
  display: none;
}

.modal .container {
 display: table-cell;
 text-align: center;
 vertical-align: middle;
 width: 200px;
}

.modal .body {
  box-shadow: 5px 10px #888888;
  display: inline-block;
  background-color: white;
  border: 1px solid black; 
  padding: 10px;
}

<button>Show Modal</button>

<div class="modal hidden">
  <div class="container">
    <div class="body">
      <p>Click outside this box to close the modal.<p>
      <p>You could of course add a close button etc</p>
      <p>But this is left for the OP todo</p> 
    </div>
  </div>
</div>

Answered By - Keith

Answer Checked By - Timothy Miller (PHPFixing Admin)