update readme

Author: hcientist

README.md

@@ -117,11 +117,15 @@ function MyBlocklyHookEmbed() {
 All properties are optional.
 
 * `initialXml`: The XML of the program to initially load in the editor.
+* `initialJson`: The JSON of the program to initially load in the editor.
+* `updateXml`: A reference to XML of the program. If this value is changed (i.e. external to the BlocklyWorkspace component or useBlocklyWorkspace hook), the Blockly workspace will update to reflect the new XML.
+* `updateJson`: A reference to JSON of the program. If this value is changed (i.e. external to the BlocklyWorkspace component or useBlocklyWorkspace hook), the Blockly workspace will update to reflect the new JSON.
 * `workspaceConfiguration`: Any configuration options to be passed into `Blockly.inject` (except for `toolbox`, which is a separate prop).
 * `toolboxConfiguration`: A JSON toolbox configuration (see [the Blockly documentation](https://developers.google.com/blockly/guides/configure/web/toolbox#json) for details on this format).
 * `className`: The value for the `class` attribute to be used on the `<div>` elements generated by this component.  Typically you'll need to use this to set the height of the Blockly editor, using either an explicit `height` style, flexboxes, or some other means.
 * `onWorkspaceChange`: A function called every time the content of the workspace changes.  It should take a single argument, which is the Blockly workspace object.  (You can call methods such as Blockly.JavaScript.workspaceToCode on this object.)
-* `onXmlChange`: A function called every time the content of the workspace, debounced to be called at most once every 200 milliseconds.  This function should take a single argument, which is the new XML generated from the workspace.
+* `onXmlChange`: A function called every time the content of the workspace changes, debounced to be called at most once every 200 milliseconds.  This function should take a single argument, which is the new XML generated from the workspace.
+* `onJsonChange`: A function called every time the content of the workspace changes, debounced to be called at most once every 200 milliseconds.  This function should take a single argument, which is the new JSON generated from the workspace.
 * `onImportXmlError`: A function called if `initialXml` can't be imported.  This function takes a single argument, which is the error thrown during XML import.
 * `onInject`: A function called after the Blockly workspace is injected.  This function takes a single argument, which is the newly-injected Blockly workspace object.  This is a good place to add Blockly plugins, if desired.
 * `onDispose`: A function called after the Blockly workspace is disposed and removed from the page.  This function takes a single argument, which is the just-disposed Blockly workspace object.  Some Blockly plugins need to use this to dispose their own resources.