html-css-javascript-online-editor-compiler

/* the container */
.custom-checkbox {
    display: inline-block;
    height: 40px;
    min-width: 60px;
    position: relative;
    margin-bottom: 30px;
    cursor: pointer;
    font-size: 16px;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    border: 1px solid #ededed;
    border-radius: 4px;
    padding: 5px 5px;
}

/* hide the browser's default checkbox */
.custom-checkbox input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

/* create a custom checkbox */
.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background-color: #fff;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* on mouse-over, add a grey background color */
.custom-checkbox:hover input ~ .checkmark {
  background-color: #ededed;
}

/* when the checkbox is checked, add a blue background */
.custom-checkbox input:checked ~ .checkmark {
  background-color: #2196F3;
	color:#fff;
}

/* create the checkmark/indicator (hidden when not checked) */
.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

/* show the checkmark when checked */
.custom-checkbox input:checked ~ .checkmark:after {
  display: block;
}

Press Ctrl+Space Key for Auto complete and Intelli Sense