Show progressbar while loading lunr and data

exampleSite/resources/_gen/assets/js/search.js_db9e329433ffca0798ed12c88043b3b3.content

@@ -1,6 +1,5 @@
-(function(){const input=document.querySelector("#book-search-input");const results=document.querySelector("#book-search-results");const dummy=document.querySelector("#book-search-dummy");input.addEventListener("focus",init);input.addEventListener("keyup",search);function init(){loadScript("/example/lunr.min.js")
-loadScript("/example/search-data.min.34183091f91a205581bbdcc247f638b72d22f51e34ab573b24519f95c4a92895.js",function(){input.readOnly=false;search();});input.removeEventListener("focus",init);}
+(function(){const input=document.querySelector("#book-search-input");const results=document.querySelector("#book-search-results");input.addEventListener("focus",init);input.addEventListener("keyup",search);function init(){input.removeEventListener("focus",init);input.required=true;loadScript("/example/lunr.min.js");loadScript("/example/search-data.min.34183091f91a205581bbdcc247f638b72d22f51e34ab573b24519f95c4a92895.js",function(){input.readOnly=false;input.required=false;search();});}
 function search(){while(results.firstChild){results.removeChild(results.firstChild);}
-if(!input.value||!window.bookSearch){return}
-const terms=lunr.tokenizer(input.value);const searchHits=window.bookSearch.idx.query(function(query){query.term(terms,{boost:100,});query.term(terms,{boost:10,wildcard:lunr.Query.wildcard.LEADING|lunr.Query.wildcard.TRAILING,});query.term(terms,{editDistance:2});});searchHits.slice(0,10).forEach(function(hit){const page=window.bookSearch.pages[hit.ref];const li=dummy.querySelector("li").cloneNode(true),a=li.querySelector("a");a.href=page.href;a.textContent=page.title;results.appendChild(li);});}
+if(!input.value){return;}
+const terms=lunr.tokenizer(input.value);const searchHits=window.bookSearch.idx.query(function(query){query.term(terms,{boost:100});query.term(terms,{boost:10,wildcard:lunr.Query.wildcard.LEADING|lunr.Query.wildcard.TRAILING});query.term(terms,{editDistance:2});});searchHits.slice(0,10).forEach(function(hit){const page=window.bookSearch.pages[hit.ref];const li=document.createElement("li"),a=li.appendChild(document.createElement("a"));a.href=page.href;a.textContent=page.title;results.appendChild(li);});}
 function loadScript(src,callback){const script=document.createElement("script");script.defer=true;script.src=src;script.onload=callback;document.head.append(script);}})();

exampleSite/resources/_gen/assets/js/search.js_db9e329433ffca0798ed12c88043b3b3.json

@@ -1 +1 @@
-{"Target":"search.min.be0d747115d15ef35d8cd20b07815450b1c3d2b84c58ba4a9f35dfff3f786384.js","MediaType":"application/javascript","Data":{"Integrity":"sha256-vg10cRXRXvNdjNILB4FUULHD0rhMWLpKnzXf/z94Y4Q="}}
+{"Target":"search.min.ea6096df2339354acbfe0aec0b99caded625821549e54c3b140a20f57db99984.js","MediaType":"application/javascript","Data":{"Integrity":"sha256-6mCW3yM5NUrL/grsC5nK3tYlghVJ5Uw7FAog9X25mYQ="}}

exampleSite/resources/_gen/assets/scss/book.scss_48b060fe05b0a273d182ef83c0605941.json

@@ -1 +1 @@
-{"Target":"book.min.466789b48a1b0e04075f086ad9e175ac3c489b1c9f7848181949c5c634222648.css","MediaType":"text/css","Data":{"Integrity":"sha256-RmeJtIobDgQHXwhq2eF1rDxImxyfeEgYGUnFxjQiJkg="}}
+{"Target":"book.min.0df04f6bec79ae69bc31fcae7e701cf43ad4f0eb54e8d339649bc0c3bc4801ca.css","MediaType":"text/css","Data":{"Integrity":"sha256-DfBPa+x5rmm8MfyufnAc9DrU8OtU6NM5ZJvAw7xIAco="}}