JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="check1" class="checkbox"><label for="check1"> Example</label>

CSS

input[type="checkbox"]{
margin-left: 10px;
display: none;  

}

label:before {
	content: "";
	display: inline-block;
	width: 16px;
	height: 16px;
	margin-left: 17px;
	position: absolute;
	left: 0;
	bottom: 1px;
	background-color: black;
	border-radius: 3px;
	box-shadow: inset 0px 2px 3px 0px rgba(0, 0, 0, .3), 0px 1px 0px 0px rgba(255, 255, 255, .8);
}

label {
	display: inline-block;
	cursor: pointer;
	position: relative;
	padding-left: 40px;
	margin-right: 15px;
	font-size: 15px;
}
.checkbox label {
	margin-bottom: 10px;
}

 .checkbox label:before {  
    border-radius: 3px;  
}  

input[type="checkbox"]:checked + label:before {  
    content: "\2713";  
    text-shadow: 1px 1px 1px rgba(0, 0, 0, .2);  
    font-size: 15px;  
    color: white;
    text-align: center;  
    line-height: 15px;  
}