Created
February 28, 2017 06:33
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<!DOCTYPE HTML> | |
<html> | |
<head> | |
<meta http-equiv="Content-type" content="text/html;charset=UTF-8"> | |
<title>Show File Data</title> | |
<style type='text/css'> | |
body { | |
font-family: sans-serif; | |
} | |
</style> | |
<script type='text/javascript'> | |
function showFileSize() { | |
var input, file; | |
// (Can't use `typeof FileReader === "function"` because apparently | |
// it comes back as "object" on some browsers. So just see if it's there | |
// at all.) | |
if (!window.FileReader) { | |
bodyAppend("p", "The file API isn't supported on this browser yet."); | |
return; | |
} | |
input = document.getElementById('fileinput'); | |
if (!input) { | |
bodyAppend("p", "Um, couldn't find the fileinput element."); | |
} | |
else if (!input.files) { | |
bodyAppend("p", "This browser doesn't seem to support the `files` property of file inputs."); | |
} | |
else if (!input.files[0]) { | |
bodyAppend("p", "Please select a file before clicking 'Load'"); | |
} | |
else { | |
file = input.files[0]; | |
bodyAppend("p", "File " + file.name + " is " + file.size + " bytes in size"); | |
} | |
} | |
function bodyAppend(tagName, innerHTML) { | |
var elm; | |
elm = document.createElement(tagName); | |
elm.innerHTML = innerHTML; | |
document.body.appendChild(elm); | |
} | |
</script> | |
</head> | |
<body> | |
<form action='#' onsubmit="return false;"> | |
<input type='file' id='fileinput'> | |
<input type='button' id='btnLoad' value='Load' onclick='showFileSize();'> | |
</form> | |
</body> | |
</html> |
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