diff --git a/html.js b/html.js
index 02e2481..cc17daf 100644
--- a/html.js
+++ b/html.js
@@ -1,3 +1,15 @@
+var loadingSpinnerCode = `
+<style>
+    @keyframes spinner-line-fade-more{0%,100%{opacity:0}1%{opacity:1}}@keyframes spinner-line-fade-quick{0%,100%,39%{opacity:.25}40%{opacity:1}}@keyframes spinner-line-fade-default{0%,100%{opacity:.22}1%{opacity:1}}@keyframes spinner-line-shrink{0%,100%,25%{transform:scale(.5);opacity:.25}26%{transform:scale(1);opacity:1}}
+</style>
+<script>
+  var __assign=this&&this.__assign||function(){return(__assign=Object.assign||function(t){for(var e,n=1,s=arguments.length;n<s;n++)for(var i in e=arguments[n])Object.prototype.hasOwnProperty.call(e,i)&&(t[i]=e[i]);return t}).apply(this,arguments)},defaults={lines:12,length:7,width:5,radius:10,scale:1,corners:1,color:"#000",fadeColor:"transparent",animation:"spinner-line-fade-default",rotate:0,direction:1,speed:1,zIndex:2e9,className:"spinner",top:"50%",left:"50%",shadow:"0 0 1px transparent",position:"absolute"},Spinner=function(){function t(t){void 0===t&&(t={}),this.opts=__assign(__assign({},defaults),t)}return t.prototype.spin=function(t){return this.stop(),this.el=document.createElement("div"),this.el.className=this.opts.className,this.el.setAttribute("role","progressbar"),css(this.el,{position:this.opts.position,width:0,zIndex:this.opts.zIndex,left:this.opts.left,top:this.opts.top,transform:"scale("+this.opts.scale+")"}),t&&t.insertBefore(this.el,t.firstChild||null),drawLines(this.el,this.opts),this},t.prototype.stop=function(){return this.el&&("undefined"!=typeof requestAnimationFrame?cancelAnimationFrame(this.animateId):clearTimeout(this.animateId),this.el.parentNode&&this.el.parentNode.removeChild(this.el),this.el=void 0),this},t}();function css(t,e){for(var n in e)t.style[n]=e[n];return t}function getColor(t,e){return"string"==typeof t?t:t[e%t.length]}function drawLines(t,e){var n=Math.round(e.corners*e.width*500)/1e3+"px",s="none";!0===e.shadow?s="0 2px 4px #000":"string"==typeof e.shadow&&(s=e.shadow);for(var i=parseBoxShadow(s),o=0;o<e.lines;o++){var r=~~(360/e.lines*o+e.rotate),a=css(document.createElement("div"),{position:"absolute",top:-e.width/2+"px",width:e.length+e.width+"px",height:e.width+"px",background:getColor(e.fadeColor,o),borderRadius:n,transformOrigin:"left",transform:"rotate("+r+"deg) translateX("+e.radius+"px)"}),d=o*e.direction/e.lines/e.speed;d-=1/e.speed;var h=css(document.createElement("div"),{width:"100%",height:"100%",background:getColor(e.color,o),borderRadius:n,boxShadow:normalizeShadow(i,r),animation:1/e.speed+"s linear "+d+"s infinite "+e.animation});a.appendChild(h),t.appendChild(a)}}function parseBoxShadow(t){for(var e=/^\s*([a-zA-Z]+\s+)?(-?\d+(\.\d+)?)([a-zA-Z]*)\s+(-?\d+(\.\d+)?)([a-zA-Z]*)(.*)$/,n=[],s=0,i=t.split(",");s<i.length;s++){var o=i[s].match(e);if(null!==o){var r=+o[2],a=+o[5],d=o[4],h=o[7];0!==r||d||(d=h),0!==a||h||(h=d),d===h&&n.push({prefix:o[1]||"",x:r,y:a,xUnits:d,yUnits:h,end:o[8]})}}return n}function normalizeShadow(t,e){for(var n=[],s=0,i=t;s<i.length;s++){var o=i[s],r=convertOffset(o.x,o.y,e);n.push(o.prefix+r[0]+o.xUnits+" "+r[1]+o.yUnits+o.end)}return n.join(", ")}function convertOffset(t,e,n){var s=n*Math.PI/180,i=Math.sin(s),o=Math.cos(s);return[Math.round(1e3*(t*o+e*i))/1e3,Math.round(1e3*(-t*i+e*o))/1e3]}
+
+  var loadingSpinner = new Spinner().spin();
+  document.getElementById('content').appendChild(loadingSpinner.el)
+</script>
+`;
+
 var generateIndexHtmlContent = ({
   bootScriptPath = "",
   bootScript = "",
@@ -9,6 +21,7 @@ var generateIndexHtmlContent = ({
   inlineCssLink = [],
   inlineJsSrc = [],
   offline = false,
+  withLoadingSpinner = false,
   resourceRoots = { projectNameSpace: "." }
 }) => {
 
@@ -43,31 +56,28 @@ var generateIndexHtmlContent = ({
 
   return `<!DOCTYPE html>
   <html>
-  
+
   <head>
       <meta http-equiv="X-UA-Compatible" content="IE=edge">
       <meta charset="utf-8">
-      <title>
-          ${title}
-      </title>
-      <script 
-          id="sap-ui-bootstrap" 
-          src="${sapUiCodeLink}" 
-          data-sap-ui-theme="${theme}"
-          data-sap-ui-compatVersion="edge" 
-          data-sap-ui-resourceroots='${JSON.stringify(resourceRoots)}'
-      >
-      </script>
-      ${jsSrcs}
+      <title>${title}</title>
   </head>
 
-  ${cssLinks}
-  
-  <body class="sapUiBody" id="content">
-      ${sBootScript}
-  </body>
-  
-  </html>`;
+  <body class="sapUiBody" id="content"></body>
+
+${withLoadingSpinner ? loadingSpinnerCode : ""}
+<script
+  id="sap-ui-bootstrap"
+  src="${sapUiCodeLink}"
+  data-sap-ui-theme="${theme}"
+  data-sap-ui-compatVersion="edge"
+  data-sap-ui-resourceroots='${JSON.stringify(resourceRoots)}'
+>
+</script>
+${sBootScript}
+${jsSrcs}
+${cssLinks}
+</html>`;
 };
 
 module.exports = { generateIndexHtmlContent };
diff --git a/index.js b/index.js
index edd6f74..1a0d8ea 100644
--- a/index.js
+++ b/index.js
@@ -36,6 +36,7 @@ module.exports = function({
   theme,
   title,
   production = false,
+  withLoadingSpinner = false,
   bootScript,
   bootScriptPath,
   offline = false,
@@ -262,6 +263,7 @@ module.exports = function({
           bootScriptPath,
           preload,
           offline,
+          withLoadingSpinner,
           inlineCssLink: cssLinks,
           resourceRoots: {
             [projectNameSpace]: ".",
