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<html>
<head>
<title>Converting Image to Data URIs in JavaScript</title>
</head>
<body>
Select Image file
<input type="file" id="files" multiple />
<div id="fileContent"></div>
</body>
<script>
function fileSelected(evt) {
var files = evt.target.files;
var type = '';
var fr = new FileReader();
fr.onload = function(event)
{
if(type.indexOf("image") == 0){
document.getElementById('fileContent').innerHTML = "<img src='" + event.target.result + "' />";
document.getElementById('fileContent').innerHTML += "<br/>";
var d = event.target.result;
d = d.replace("data:;","data:" + type + ";");
document.getElementById('fileContent').innerHTML += "<strong>Data URI: </strong>" + d;
}
}
for (var i = 0, f; f = files[i]; i++) {
//Gives name of file : f.name
//Gives type of file : f.type e.g. text/plain or image/png etc
//Gives size of file : f.size (in bytes)
//Gives last modified date : f.lastModifiedDate
var fileCopy = f.slice(0, f.size); //i.e. read entire file, as reading half image file doesn't solve any purpose
type = f.type;
if(f.type.indexOf("image") == 0)
fr.readAsDataURL(fileCopy); //on successful read, fr.onload function will be called and that will populate the result in fileContent container
}
}
//attach change event of file control
document.getElementById('files').addEventListener('change', fileSelected, false);
</script>
</html>