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CODE EXAMPLE FOR JAVASCRIPT

filereader check file type

var fileTypes = ['jpg', 'jpeg', 'png', 'what', 'ever', 'you', 'want'];  //acceptable file types

function readURL(input) {
    if (input.files && input.files[0]) {
        var extension = input.files[0].name.split('.').pop().toLowerCase(),  //file extension from input file
            isSuccess = fileTypes.indexOf(extension) > -1;  //is extension in acceptable types

        if (isSuccess) { //yes
            var reader = new FileReader();
            reader.onload = function (e) {
                alert('image has read completely!');
            }

            reader.readAsDataURL(input.files[0]);
        }
        else { //no
            //warning
        }
    }
}
Source by stackoverflow.com #
 
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Tagged: #filereader #check #file #type
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