Add descriptions

packages/survey-creator-core/src/creator-base.ts

@@ -435,8 +435,8 @@ export class SurveyCreatorModel extends Base
    */
   public onHtmlToMarkdown: EventBase<SurveyCreatorModel, HtmlToMarkdownEvent> = this.addCreatorEvent<SurveyCreatorModel, HtmlToMarkdownEvent>();
 
-  /**
-
+  /*
+   * An event that is raised when Survey Creator obtains the expand/collapse state of a survey element on the design surface. Handle this event to set a required state.
    */
   public onElementGetExpandCollapseState: EventBase<SurveyCreatorModel, ElementGetExpandCollapseStateEvent> = this.addCreatorEvent<SurveyCreatorModel, ElementGetExpandCollapseStateEvent>();
   /**
@@ -1205,7 +1205,7 @@ export class SurveyCreatorModel extends Base
     const chaningOptions = { tabName: viewName, allow: allow, model: this.currentPlugin?.model };
     this.onActiveTabChanging.fire(this, chaningOptions);
     if (!chaningOptions.allow) return;
-    if(!!this.currentPlugin?.deactivate && !this.currentPlugin.deactivate()) return;
+    if (!!this.currentPlugin?.deactivate && !this.currentPlugin.deactivate()) return;
     const plugin = this.activatePlugin(viewName);
     this.viewType = viewName;
     this.onActiveTabChanged.fire(this, { tabName: viewName, plugin: plugin, model: !!plugin ? plugin.model : undefined });
@@ -2191,12 +2191,12 @@ export class SurveyCreatorModel extends Base
       this.initSurveyWithJSON(undefined, clearState);
     } else {
       let jsonValue = trustJSON ? this.parseJSON(value) : undefined;
-      if(!trustJSON) {
+      if (!trustJSON) {
         const textWorker = new SurveyTextWorker(value);
-        if(textWorker.isJsonCorrect) {
+        if (textWorker.isJsonCorrect) {
           jsonValue = this.parseJSON(value);
         }
-        else if(!!textWorker.survey) {
+        else if (!!textWorker.survey) {
           jsonValue = textWorker.survey.toJSON();
         }
       }

packages/survey-creator-core/src/creator-events-api.ts

@@ -89,8 +89,17 @@ export interface HtmlToMarkdownEvent {
 
 export type ElementGetExpandCollapseStateEventReason = "loading" | "collapse-all" | "expand-all" | "drag-start" | "drag-end";
 export interface ElementGetExpandCollapseStateEvent {
+  /**
+   * A survey element (question, panel, or page) whose expand/collapse state you can switch. 
+   */
   element: Question | PanelModel | PageModel;
+  /**
+   * Indicates whether the element is currently collapsed or expanded. Set this parameter to `true` if you want to collapse the element or `false` to expand it.
+   */
   collapsed: boolean;
+  /**
+   * A value that indicates what caused the event to raise: the loading of a survey JSON schema, a click on the Expand All or Collapse All button, or the beginning or end of a drag and drop operation.
+   */
   reason: ElementGetExpandCollapseStateEventReason;
 }
 

packages/survey-creator-core/src/creator-options.ts

@@ -272,6 +272,14 @@ export interface ICreatorOptions {
    */
   pageEditMode?: "standard" | "single" | "bypage";
   enableLinkFileEditor?: boolean;
-
+  /*
+   * Specifies the visibility of the buttons that expand and collapse survey elements on the design surface.
+   * 
+   * Possible values:
+   * 
+   * - `"onhover"` (default) - Displays an expand/collapse button when a survey element is hovered over or selected.
+   * - `"always"` - Displays the expand/collapse buttons permanently.
+   * - `"never"` - Hides the expand/collapse buttons.
+   */
   expandCollapseButtonVisibility?: "never" | "onhover" | "always";
 }