JS jquery upload file format size judgment Simple summary

Hello, everyone. I am the moon in front of the bed, suspicion is ground frost

Html

<a href= "javascript:;" class= "file" > Add attachment
    <input type= "File" Name= "id=" fileId "onchange=" Upload () ">
</a>

/** determine the file format of the uploaded file **/
var filePath = "";
var fileType = "";
function upload () {
    var fileName = $ (' #fileId '). Val (). split (' \ \ '); Get an array of file names
    var fileSize =  document.getElementById (' fileId '). Files[0];//get file size;
    FileName2 = Filename[filename.length-1]; Get file name
    FilePath = $ (' #fileId '). Val (). toLowerCase (). Split (".");
    FileType =  filepath[filepath.length-1];//Get End-of-file type such as zip rar This writing ensures that it is the last
    $ ('. Errhint '). Show (). Text (filename[2]);
    Console.log (FilePath);
    Console.log (FileType);
    if (! ( FileType = = "PNG" | | FileType = = "JPG" | | FileType = = "Xlsx" | | FileType = = "Docx" | | FileType = = "rar" | | FileType = = "Zip")) {
        $ ('. Errhint '). Show (). Text (' file format does not meet the requirements! ‘)
    }else if (filesize.size>10485760) {
        $ ('. Errhint '). Show (). Text (' Error! Please upload no more than 10M files ');
        Return
    }
}
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JS jquery upload file format size judgment Simple summary