fix for #81

Author: thecodejack

src/components/Dropzone.svelte

@@ -9,7 +9,7 @@
     isIeOrEdge,
     isPropagationStopped,
     onDocumentDragOver,
-    TOO_MANY_FILES_REJECTION
+    TOO_MANY_FILES_REJECTION,
   } from "./../utils/index";
   import { onMount, onDestroy, createEventDispatcher } from "svelte";
 
@@ -45,7 +45,7 @@
     isDragReject: false,
     draggedFiles: [],
     acceptedFiles: [],
-    fileRejections: []
+    fileRejections: [],
   };
 
   let rootRef;
@@ -112,7 +112,7 @@
     dragTargetsRef = [...dragTargetsRef, event.target];
 
     if (isEvtWithFiles(event)) {
-      Promise.resolve(getFilesFromEvent(event)).then(draggedFiles => {
+      Promise.resolve(getFilesFromEvent(event)).then((draggedFiles) => {
         if (isPropagationStopped(event) && !noDragEventsBubbling) {
           return;
         }
@@ -121,7 +121,7 @@
         state.isDragActive = true;
 
         dispatch("dragenter", {
-          dragEvent: event
+          dragEvent: event,
         });
       });
     }
@@ -139,7 +139,7 @@
 
     if (isEvtWithFiles(event)) {
       dispatch("dragover", {
-        dragEvent: event
+        dragEvent: event,
       });
     }
 
@@ -152,7 +152,7 @@
 
     // Only deactivate once the dropzone and all children have been left
     const targets = dragTargetsRef.filter(
-      target => rootRef && rootRef.contains(target)
+      (target) => rootRef && rootRef.contains(target)
     );
     // Make sure to remove a target present multiple times only once
     // (Firefox may fire dragenter/dragleave multiple times on the same element)
@@ -170,7 +170,7 @@
 
     if (isEvtWithFiles(event)) {
       dispatch("dragleave", {
-        dragEvent: event
+        dragEvent: event,
       });
     }
   }
@@ -182,28 +182,28 @@
     dragTargetsRef = [];
 
     if (isEvtWithFiles(event)) {
-      Promise.resolve(getFilesFromEvent(event)).then(files => {
+      Promise.resolve(getFilesFromEvent(event)).then((files) => {
         if (isPropagationStopped(event) && !noDragEventsBubbling) {
           return;
         }
 
         const acceptedFiles = [];
         const fileRejections = [];
 
-        files.forEach(file => {
+        files.forEach((file) => {
           const [accepted, acceptError] = fileAccepted(file, accept);
           const [sizeMatch, sizeError] = fileMatchSize(file, minSize, maxSize);
           if (accepted && sizeMatch) {
             acceptedFiles.push(file);
           } else {
-            const errors = [acceptError, sizeError].filter(e => e);
+            const errors = [acceptError, sizeError].filter((e) => e);
             fileRejections.push({ file, errors });
           }
         });
 
         if (!multiple && acceptedFiles.length > 1) {
           // Reject everything and empty accepted files
-          acceptedFiles.forEach(file => {
+          acceptedFiles.forEach((file) => {
             fileRejections.push({ file, errors: [TOO_MANY_FILES_REJECTION] });
           });
           acceptedFiles.splice(0);
@@ -215,20 +215,20 @@
         dispatch("drop", {
           acceptedFiles,
           fileRejections,
-          event
+          event,
         });
 
         if (fileRejections.length > 0) {
           dispatch("droprejected", {
             fileRejections,
-            event
+            event,
           });
         }
 
         if (acceptedFiles.length > 0) {
           dispatch("dropaccepted", {
             acceptedFiles,
-            event
+            event,
           });
         }
       });
@@ -290,10 +290,10 @@
   });
 
   onDestroy(() => {
-    window.removeEventListener("focus", onWindowFocus, false);
+    window && window.removeEventListener("focus", onWindowFocus, false);
     if (preventDropOnDocument) {
-      document.removeEventListener("dragover", onDocumentDragOver);
-      document.removeEventListener("drop", onDocumentDrop);
+      document && document.removeEventListener("dragover", onDocumentDragOver);
+      document && document.removeEventListener("drop", onDocumentDrop);
     }
   });
 
@@ -302,27 +302,6 @@
   }
 </script>
 
-<style>
-  .dropzone {
-    flex: 1;
-    display: flex;
-    flex-direction: column;
-    align-items: center;
-    padding: 20px;
-    border-width: 2px;
-    border-radius: 2px;
-    border-color: #eeeeee;
-    border-style: dashed;
-    background-color: #fafafa;
-    color: #bdbdbd;
-    outline: none;
-    transition: border 0.24s ease-in-out;
-  }
-  .dropzone:focus {
-    border-color: #2196f3;
-  }
-</style>
-
 <div
   bind:this={rootRef}
   tabindex="0"
@@ -336,7 +315,8 @@
   on:dragenter={composeDragHandler(onDragEnterCb)}
   on:dragover={composeDragHandler(onDragOverCb)}
   on:dragleave={composeDragHandler(onDragLeaveCb)}
-  on:drop={composeDragHandler(onDropCb)}>
+  on:drop={composeDragHandler(onDropCb)}
+>
   <input
     {accept}
     {multiple}
@@ -346,8 +326,30 @@
     on:change={onDropCb}
     on:click={onInputElementClick}
     bind:this={inputRef}
-    style="display: none;" />
+    style="display: none;"
+  />
   <slot>
     <p>Drag 'n' drop some files here, or click to select files</p>
   </slot>
 </div>
+
+<style>
+  .dropzone {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    padding: 20px;
+    border-width: 2px;
+    border-radius: 2px;
+    border-color: #eeeeee;
+    border-style: dashed;
+    background-color: #fafafa;
+    color: #bdbdbd;
+    outline: none;
+    transition: border 0.24s ease-in-out;
+  }
+  .dropzone:focus {
+    border-color: #2196f3;
+  }
+</style>