javascript - tell jquery mobile / phonegap app to wait until content is loaded -


i've got phonegap app using jquery, jquery mobile, js, css & html.

i use listview show , filter lot of li's. when lists text work great. when (as want) li's solely populated images - random number of them fail load, leaving blank li's.

(when testing on pc in chrome works fine. fails once ut's phonegap'd , running on phone app).

if slow index page adding few hundred lines of useless code - images display.

so think problem page loads , finalises before images have loaded.

is there way tell app not load until images ready?

edit: code i'm using:

<div data-role="content">        <ul data-role="listview" data-icon="false" data-filter="true" data-filter-placeholder="search cards..." data-inset="true">      <li data-role="list-divider">list of things</li>     <li data-filtertext="various:different:keywords"><div><img src="img/01046.jpg" class="cardimg"></div></li>     <li data-filtertext="various:different:keywords"><div><img src="img/01047.jpg" class="cardimg"></div></li>     <li data-filtertext="various:different:keywords"><div><img src="img/01048.jpg" class="cardimg"></div></li> ...

and on. there lot of images, , number going bigger on time.

you should add <li> containing image <ul> when each of image loaded. inside image callback img.onload add <li> , refresh jqm filterable listview.

here example:

var imageslist = [    {searchwords: "lewis hamilton", src: "https://via.placeholder.com/2323x2323"},    {searchwords: "sebastian vettel", src: "https://via.placeholder.com/1212x1212"},    {searchwords: "kimi raikkonen", src: "https://via.placeholder.com/2333x2333"},    {searchwords: "felipe massa", src: "https://via.placeholder.com/2000x2000"},    {searchwords: "valtteri bottas", src: "https://via.placeholder.com/1111x1111"},    {searchwords: "daniel ricciardo", src: "https://via.placeholder.com/666x666"},    {searchwords: "nicolas hulkenberg", src: "https://via.placeholder.com/2222x2222"}  ], remaining;    function addtolist() {    remaining--;    var head = $("#page-images-list .ui-header h1");    var msg = (remaining === 0) ? "all images loaded." : "remaining: " + remaining;    $(head).html(msg);    var html = '<li data-filtertext="'+this.searchwords+'">';    html += '<a href="#">';    html += '<img src="'+this.src+'">';    html += '<h2>'+this.searchwords+'</h2>';    html += '<p>'+this.src+'</p></a>';    html += '</li>';    $("#listview-images").append(html);    //$("#listview-images").listview("refresh");    $("#listview-images").filterable("refresh");  }    function loadimages(dest, list) {    $(dest).empty();    remaining = list.length;    $.each(list, function(index, item) {      var img = new image();      img.searchwords = item.searchwords;      img.onload = addtolist;      settimeout(function() {        img.src = item.src;      }, 0);    });  }  $(document).on("vclick", "#btn-reload", function(e) {    loadimages("#listview-images", imageslist);  });    $(document).on("pagecontainershow", function(e, ui) {    if (typeof ui.topage == "object") {      switch (ui.topage.prop("id")) {        case "page-images-list":          loadimages("#listview-images", imageslist);          break;      }    }  });
<!doctype html>  <html>  <head>    <meta charset="utf-8">    <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">    <link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.css">    <script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>    <script src="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.js"></script>  </head>  <body>    <div id="page-images-list" data-role="page">      <div data-role="header" data-position="fixed">      <a href="#" id="btn-reload" class="ui-btn-left ui-btn ui-btn-inline ui-mini ui-corner-all ui-btn-icon-left ui-icon-refresh">reload</a>        <h1>images callback</h1>      </div>      <div role="main" class="ui-content">        <ul data-role="listview" data-inset="true" data-filter="true" id="listview-images">        </ul>      </div>    </div>  </body>  </html>

additional note:

if using list divider group list content, please note image arrival sequence not guaranteed in same order has been defined in images list array. depends how big each image , network traffic. so, if additionally need group list items in way, need additional code sort again list elements when each images loaded. if images have been downloaded , cached browser, array order (probably) maintained.


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