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        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <div id="unique">
        <h1>wrapInner() function</h1>


                @import "compass/css3";




A Vanilla JS alternative for jQuery's wrapInner() 
innerwrap an HTML element with the option to add an attribute & value with it.
Derived from:
 Four parameters you can use:
 'parent'           = the element that needs to be innerwrapped
 'wrapper'          = the element that will innerwrap the parent
 'attribute'        = the attribute that you need this innerwrapped element to have
 'attributevalue'   = the value of the attribute you've just created
 wrapInner('body', 'div', 'class', 'my-class');

var background = document.querySelector("#unique");
var bodyinner  = document.body;
var divtag     = document.querySelector("div");

function wrapInner(parent, wrapper, attribute, attributevalue) {
    if (typeof wrapper === "string") {
        wrapper = document.createElement(wrapper);
    var div = parent.appendChild(wrapper)
              .setAttribute(attribute, attributevalue);

    while (parent.firstChild !== wrapper) {

//Check if the body element has an ID of #unique
if (divtag.hasAttribute("id", "#unique")) {
    wrapInner(bodyinner, 'div', 'id', 'innerwrapped-element');