Use javascript to determine whether a file exists_javascript skills

When judging the client file, you can use

to copy the code The code is as follows:

var fso,s =filespec; // filespec="C:/path/myfile.txt"
fso=new ActiveXObject("Scripting.FileSystemObject");
if(fso.FileExists(filespec))
s=" exists.";
else
s =" doesn't exist.";
alert(s);

When judging the server side (network file), you can use

Copy code The code is as follows:

var xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.open("GET",yourFileURL,false);
xmlhttp.send();
if(xmlhttp.readyState==4){
if(xmlhttp.status==200) s =" exists."; //url exists
else if(xmlhttp.status==404)s =" doesn't exist."; //url does not exist
else s ="";// Other statuses
}
alert(s);

canSet contentEditable to false to restrict users to only select files, not to type in.