Handle error when switching mode

src/TextMode.js

@@ -33,11 +33,10 @@ export default class TextMode extends Component {
         h('div', {class: 'jsoneditor-vertical-menu-separator'}),
 
         this.props.options.modes && h(ModeButton, {
-          open: this.state.modeMenuOpen,
           modes: this.props.options.modes,
           mode: this.props.mode,
           onMode: this.props.onMode,
-          onClick: this.handleShowModeMenu
+          onError: this.handleError
         })
       ]),
 
@@ -92,7 +91,7 @@ export default class TextMode extends Component {
   }
 
   /** @private */
-  handleError (err) {
+  handleError = (err) => {
     if (this.props.options && this.props.options.onError) {
       this.props.options.onError(err)
     }

src/TreeMode.js

@@ -101,7 +101,8 @@ export default class TreeMode extends Component {
       this.props.options.modes && h(ModeButton, {
         modes: this.props.options.modes,
         mode: this.props.mode,
-        onMode: this.props.onMode
+        onMode: this.props.onMode,
+        onError: this.handleError
       })
     ])
   }
@@ -199,6 +200,16 @@ export default class TreeMode extends Component {
     this.emitOnChange (actions, revert)
   }
 
+  /** @private */
+  handleError = (err) => {
+    if (this.props.options && this.props.options.onError) {
+      this.props.options.onError(err)
+    }
+    else {
+      console.error(err)
+    }
+  }
+
   /**
    * Emit an onChange event when there is a listener for it.
    * @param {JSONPatch} patch

src/menu/ModeButton.js

@@ -12,7 +12,7 @@ export default class ModeButton extends Component {
   }
 
   /**
-   * @param {{modes: string[], mode: string, onMode: function}} props
+   * @param {{modes: string[], mode: string, onMode: function, onError: function}} props
    * @param state
    * @return {*}
    */

src/menu/ModeMenu.js

@@ -3,7 +3,7 @@ import { toCapital } from '../utils/stringUtils'
 
 export default class ModeMenu extends Component {
   /**
-   * @param {{open, modes, mode, onMode}} props
+   * @param {{open, modes, mode, onMode, onError}} props
    * @param {Obect} state
    * @return {JSX.Element}
    */
@@ -15,8 +15,13 @@ export default class ModeMenu extends Component {
           class: 'jsoneditor-menu-button jsoneditor-type-modes' +
               ((mode === props.mode) ? ' jsoneditor-selected' : ''),
           onClick: () => {
-            props.onMode(mode)
-            this.setState({ open: false })
+            try {
+              props.onMode(mode)
+              this.setState({ open: false })
+            }
+            catch (err) {
+              props.onError(err)
+            }
           }
         }, toCapital(mode))
       })