JSFiddle - React, Tailwind, and code Playground

by Emanuel Vecchio

HTML

<div ng-app="brianite" ng-controller="BodyCtrl as body">
    <form>
        <file-drop message="Drop files here or click to upload"></file-drop>
    </form>
</div>

CSS

.dropzone {
    position: relative;
    border: 2px dashed #0087F7;
    border-radius: 5px;
    background: white;
    height: 150px;
    text-align: center;
    line-height: 140px;
}
.drag {
    background: red;
}
.filepicker {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    width: 100%;
    height: 100%;
}

JavaScript

var app = angular.module('brianite', []);

function BodyCtrl($scope, $timeout) {
    this.model = {};
    this.model.app_name = "Brianite";
}

BodyCtrl.$inject = ['$scope', '$timeout'];

app.controller('BodyCtrl', BodyCtrl);

function FileDropDirective() {
    return {
        restrict: 'E',
        scope: {
            message: '@'
        },
        template: '<div class="dropzone" ng-class="{ drag: dragging }">' +
            '<input type="file" class="filepicker"/>' +
            '<span class="message">{{message}}</span>' +
            '</div>',
        link: linkFunction
    };

    function linkFunction(scope, element, attrs) {
        scope.dragging = false;

        function processDragLeave(event) {
            scope.$apply(function () {
                scope.dragging = false;
            });
        }

        function processDragOverOrEnter(event) {
            scope.$apply(function () {
                scope.dragging = true;
            });

            if (event != null) {
                event.preventDefault();
            }
            event.dataTransfer.effectAllowed = 'copy';
            return false;
        };

        element.bind('dragover', processDragOverOrEnter);
        element.bind('dragenter', processDragOverOrEnter);
        element.bind('dragleave', processDragLeave);

        element.bind('drop', function (event) {
            processDragLeave(event);
            var file, name, reader, size, type;
            if (event != null) {
                event.preventDefault();
            }
            reader = new FileReader();
            file = event.dataTransfer.files[0];
            name = file.name;
            type = file.type;
            size = file.size;
            reader.readAsDataURL(file);
            return false;
        });
    }
}

FileDropDirective.$inject = [];

app.directive('fileDrop', FileDropDirective);