When creating images in jqplot, I often use the jqplotToImageStr({}) function to convert them into a base64 png string for sending to the server. However, I've encountered an issue where jqplotToImageStr({}) returns null in browsers that do not support canvas (specifically those <= IE 8). Is there a workaround or alternative method to successfully utilize jqplotToImageStr({}) in these canvas-unaware browsers?
Based on my personal experience, achieving this task is highly unlikely. Our server rigorously examines string inputs and promptly notifies the user if any input is found to be null.
Check out this javascript snippet below, taken from a jqplot sample. Add it to the end of your webpage for implementation.
<script>
$(document).ready(function(){if(!$.jqplot._noCodeBlock){$("script.code").each(function(c){if($("pre.code").eq(c).length){$("pre.code").eq(c).text($(this).html())}else{var d=$('<pre class="code prettyprint brush: js"></pre>');$("div.jqplot-target").eq(c).after(d);d.text($(this).html());d=null}});$("script.common").each(function(c){$("pre.common").eq(c).text($(this).html())});var b="";if($("script.include, link.include").length>0){if($("pre.include").length==0){var a=['<div class="code prettyprint include">','<p class="text">The charts on this page depend on the following files:</p>','<pre class="include prettyprint brush: html gutter: false"></pre>',"</div>"];a=$(a.join("\n"));$("div.example-content").append(a);a=null}$("script.include").each(function(c){if(b!==""){b+="\n"}b+='<script type="text/javascript" src="'+$(this).attr("src")+'"><\/script>'});$("link.include").each(function(c){if(b!==""){b+="\n"}b+='<link rel="stylesheet" type="text/css" hrf="'+$(this).attr("href")+'" />'});$("pre.include").text(b)}else{$("pre.include").remove();$("div.include").remove()}}if(!$.jqplot.use_excanvas){$("div.jqplot-target").each(function(){var d=$(document.createElement("div"));var g=$(document.createElement("div"));var f=$(document.createElement("div"));d.append(g);d.append(f);d.addClass("jqplot-image-container");g.addClass("jqplot-image-container-header");f.addClass("jqplot-image-container-content");g.html("Right Click to Save Image As...");var e=$(document.createElement("a"));e.addClass("jqplot-image-container-close");e.html("Close");e.attr("href","#");e.click(function(){$(this).parents("div.jqplot-image-container").hide(500)});g.append(e);$(this).after(d);d.hide();d=g=f=e=null;if(!$.jqplot._noToImageButton){var c=$(document.createElement("button"));c.text("View Plot Image");c.addClass("jqplot-image-button");c.bind("click",{chart:$(this)},function(h){var j=h.data.chart.jqplotToImageElem();var i=$(this).nextAll("div.jqplot-image-container").first();i.children("div.jqplot-image-container-content").empty();i.children("div.jqplot-image-container-content").append(j);i.show(500);i=null});$(this).after(c);c.after("<br />");c=null}})}$(document).unload(function(){$("*").unbind()})});
</script>
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