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HTML

CSS

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HTML

              
                <div class="c-form-area js-form-area">
  <h1 class="c-type-alpha">Login</h1>
  <form>
    <input class="c-input js-input" type="text" placeholder="Username">
    <input class="c-input js-input" type="password" placeholder="Password">
    <button class="c-button" data-class="is-loading, is-disabled" data-class-element="js-form-area, js-input" data-class-scope="false, js-form-area">Submit</button>
  </form>
</div>
              
            
!

CSS

              
                body {
  font-family:sans-serif;
  background-color:#f4f4f4;
}

.c-form-area {
  width:300px;
  background-color:#ffffff;
  border:1px solid #cccccc;
  border-radius:3px;
  padding:10px 10px 20px 10px;
  margin:30px auto;
  box-shadow: 1px 1px 5px rgba(0,0,0,0.2);
}

.c-input {
  display:block;
  width:100%;
  margin-bottom:20px;
  font-size:inherit;
  padding:10px;
  box-sizing:border-box;
}

.c-input.is-disabled {
  background:#ccc;
  pointer-events:none;
	user-select:none;
  border:0;
}

.c-type-alpha {
  text-align:center;
}

.c-button {
  display:block;
  margin:0 auto;
  font-size:inherit;
  padding:10px;
}

.c-form-area.is-loading {
  position:relative;
  &:before {
    position:absolute;
    top:0;
    left:0;
    display:block;
    content:"";
    width:100%;
    height:100%;
    background:rgba(255,255,255,0.9);
  }
  &:after {
    height:20px;
    text-align:center;
    display:block;
    content:"Loading...";
    position:absolute;
    margin:auto;
    left:0;
    right:0;
    top:0;
    bottom:0;
  }
}
              
            
!

JS

              
                // Grab all elements with data-active attribute
var elems = document.querySelectorAll("[data-class][data-class-element]");

// closestParent helper function
closestParent = function(child, match) {
	if (!child || child == document) {
		return null;
	}
	if (child.classList.contains(match) || child.nodeName.toLowerCase() == match) {
		return child;
	}
	else {
		return closestParent(child.parentNode, match);
	}
}

// Loop through if any are found
for(var i = 0; i < elems.length; i++){
	// Add event listeners to each one
	elems[i].addEventListener("click", function(e){

		// Prevent default action of element
		e.preventDefault();

		// Grab classes list and convert to array
		var dataClass = this.getAttribute('data-class');
		dataClass = dataClass.split(", ");

		// Grab linked elements list and convert to array
		var dataClassElement = this.getAttribute('data-class-element');
		dataClassElement = dataClassElement.split(", ");

		// Grab data-scope list if present and convert to array
		if(this.getAttribute("data-class-scope")) {
			var dataClassScope = this.getAttribute("data-class-scope");
			dataClassScope = dataClassScope.split(", ");
		}

		// Loop through all our dataClassElement items
		for(var b = 0; b < dataClassElement.length; b++) {
			// Grab elem references, apply scope if found
			if(dataClassScope && dataClassScope[b] !== "false") {
				// Grab parent
				var elemParent = closestParent(this, dataClassScope[b]),

				// Grab all matching child elements of parent
				elemRef = elemParent.querySelectorAll("." + dataClassElement[b]);

				// Convert to array
				elemRef = Array.prototype.slice.call(elemRef);

				// Add parent if it matches the data-class-element and fits within scope
				if(dataClassScope[b] === dataClassElement[b] && elemParent.classList.contains(dataClassElement[b])) {
					elemRef.unshift(elemParent);
				}
			}
			else {
				var elemRef = document.querySelectorAll("." + dataClassElement[b]);
			}
			// Grab class we will add
			var elemClass = dataClass[b];
			// Do
			for(var c = 0; c < elemRef.length; c++) {
				elemRef[c].classList.toggle(elemClass);
			}
		}

	});    
}
              
            
!
999px

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