#160 Handle clipboard errors

README.md

@@ -248,9 +248,11 @@ A similar callback is executed whenever an item is copied to the clipboard (if p
     type        // Either "path" or "value" depending on whether "Cmd/Ctrl" was pressed 
     stringValue // A nicely stringified version of `value`  
                 // (i.e. what the clipboard actually receives)
+    success     // true/false -- whether clipboard copy action actually succeeded
+    errorMessage// Error detail if success === false
 ```
 
-Since there is very little user feedback when clicking "Copy", a good idea would be to present some kind of notification in this callback.
+Since there is very little user feedback when clicking "Copy", a good idea would be to present some kind of notification in this callback. There are situations (such as an insecure environment) where the browser won't actually permit any clipboard actions. In this case, the `success` property will be `false`, so you can handle it appropriately.
 
 ### Custom Buttons
 

demo/src/App.tsx

@@ -363,14 +363,23 @@ function App() {
               }
               enableClipboard={
                 allowCopy
-                  ? ({ stringValue, type }) =>
-                      toast({
-                        title: `${type === 'value' ? 'Value' : 'Path'} copied to clipboard:`,
-                        description: truncate(String(stringValue)),
-                        status: 'success',
-                        duration: 5000,
-                        isClosable: true,
-                      })
+                  ? ({ stringValue, type, success, errorMessage }) => {
+                      success
+                        ? toast({
+                            title: `${type === 'value' ? 'Value' : 'Path'} copied to clipboard:`,
+                            description: truncate(String(stringValue)),
+                            status: 'success',
+                            duration: 5000,
+                            isClosable: true,
+                          })
+                        : toast({
+                            title: 'Problem copying to clipboard',
+                            description: errorMessage,
+                            status: 'error',
+                            duration: 5000,
+                            isClosable: true,
+                          })
+                    }
                   : false
               }
               restrictEdit={restrictEdit}

src/ButtonPanels.tsx

@@ -10,6 +10,7 @@ import {
   type NodeData,
   type CustomButtonDefinition,
   type KeyboardControlsFull,
+  type JsonData,
 } from './types'
 import { getModifier } from './helpers'
 
@@ -67,8 +68,10 @@ export const EditButtons: React.FC<EditButtonProps> = ({
   const handleCopy = (e: React.MouseEvent<HTMLElement>) => {
     e.stopPropagation()
     let copyType: CopyType = 'value'
-    let value
+    let value: JsonData
     let stringValue = ''
+    let success: boolean
+    let errorMessage: string | null = null
     if (enableClipboard) {
       const modifier = getModifier(e)
       if (modifier && keyboardControls.clipboardModifier.includes(modifier)) {
@@ -79,10 +82,39 @@ export const EditButtons: React.FC<EditButtonProps> = ({
         value = data
         stringValue = type ? JSON.stringify(data, null, 2) : String(value)
       }
-      void navigator.clipboard?.writeText(stringValue)
-      if (typeof enableClipboard === 'function') {
-        enableClipboard({ value, stringValue, path, key, type: copyType })
+      if (!navigator.clipboard) {
+        if (typeof enableClipboard === 'function')
+          enableClipboard({
+            success: false,
+            value,
+            stringValue,
+            path,
+            key,
+            type: copyType,
+            errorMessage: "Can't access clipboard API",
+          })
+        return
       }
+      navigator.clipboard
+        ?.writeText(stringValue)
+        .then(() => (success = true))
+        .catch((err) => {
+          success = false
+          errorMessage = err.message
+        })
+        .finally(() => {
+          if (typeof enableClipboard === 'function') {
+            enableClipboard({
+              success,
+              errorMessage,
+              value,
+              stringValue,
+              path,
+              key,
+              type: copyType,
+            })
+          }
+        })
     }
   }
 

src/types.ts

@@ -139,6 +139,8 @@ export type SearchFilterInputFunction = (
 
 export type CopyType = 'path' | 'value'
 export type CopyFunction = (input: {
+  success: boolean
+  errorMessage: string | null
   key: CollectionKey
   path: CollectionKey[]
   value: unknown
@@ -208,7 +210,7 @@ export interface NodeData {
   path: CollectionKey[]
   level: number
   index: number
-  value: unknown
+  value: JsonData
   size: number | null
   parentData: object | null
   fullData: JsonData