[英]Javascript/HTML variable is undefined (global var)
好的,我似乎无法弄清楚为什么此变量在警报框中未定义回来。 我在这里想念什么?
<html>
<script src="xslt.js"></script>
<script>
var file;
var objecturl;
var files;
var filename="filename goes here";
function handleFileSelect(evt) {
files = evt.target.files; // FileList object
file = files[0];
filename = file.name;
}
function submit() {
alert(filename);
}
document.getElementById('files').addEventListener('change', handleFileSelect, false);
</script>
Select your XML/CCD File(s):<input type="file" id="files" name="files[]" multiple />
<input id="clickMe" type="button" value="View CCD" onclick="submit();" />
<div id="transformResult"></div>
</html>
尝试这个:
<script>
var file;
var objecturl;
var files;
var filename="filename goes here";
function handleFileSelect(evt) {
files = evt.target.files; // FileList object
file = files[0];
filename = file.name;
}
function submit() {
alert(filename);
}
</script>
Select your XML/CCD File(s):<input type="file" id="files" name="files[]" multiple />
<input id="clickMe" type="button" value="View CCD" onclick="submit();" />
<div id="transformResult"></div>
<script>
document.getElementById('files').addEventListener('change', handleFileSelect, false);
</script>
注意,我将addEventListener移到了在DOM中加载元素后运行的脚本。
在调用getElementById
之前,您必须等待input
字段位于dom中,因此未设置filename
。
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