How to read the contents inside the dataURL? As readAsDataURL is called first and then your reader.onload function called. If I used reader.readAsDataURL inside onload function. I get error as below: Uncaught TypeError: Failed to execute 'readAsDataURL' on 'FileReader': parameter 1 is not of type 'Blob'.
sample code:https://jsfiddle.net/zzx4aeLg/3/
<input type='file' onchange='openFile(event)'>
<script>
var openFile = function(event) {
var input = event.target;
var reader = new FileReader();
reader.onload = function() {
debugger;
var dataURL = reader.result;
};
reader.readAsDataURL(input.files[0]);
};
</script>
