https://github.com/brianmcleer/sidebar-custom-widget
A customized version of Esri's Sidebar widget for ArcGIS Experience Builder. It keeps everything the stock Sidebar does and adds automatic expansion so a collapsed sidebar opens itself when a table is shown, which keeps the Table widget visible inside the sidebar instead of hidden behind a collapsed panel.
Features
- Auto-expand on table open. When a collapsed sidebar contains a Table widget and a user runs "Add to table" or "View in table", the sidebar expands automatically so the table is visible.
- Auto-expand for widget controllers. A collapsed sidebar also expands when a widget inside a Widget Controller is opened, so the controller content is not stuck behind a collapsed panel.
- Everything from the stock Sidebar widget: two configurable panels (FIRST and SECOND), fixed layouts, the toggle button with its configurable colors and border, and the toggle and open message actions.
Changelog:
6/26/26:
- Auto-resize for tools and tables. The sidebar can widen to a size you set while a tool or table is open, then go back to its normal width when it closes. It respects a manual resize, so it won't override a width you set yourself.
- Peek on hover. Hovering the collapsed edge briefly reveals the sidebar, and it re-collapses when you move away. Good for a quick glance without fully opening it.
- Update badge. A small dot shows on the toggle button when the collapsed content changes while the sidebar is closed, so users notice new results. It clears once the sidebar is opened.
- Pin and close panel header. An optional header bar on the panel adds a pin button that keeps the sidebar open and holds off the auto-collapse behaviors until you unpin, plus a close button.
- Published expand/collapse message. The sidebar can send an "expanded" or "collapsed" message that other widgets can react to through a standard message action.
- URL deep-linking. The open or collapsed state can be saved in the URL and restored on load, so a shared or bookmarked link opens in the same state.
- Everything new is off by default and set in the widget's Behavior settings, so existing apps don't change until you turn something on.
2/23/26:
- Widget now supports auto expansion for widget controller or view/add in table.
- Have collapsed sidebars expand when using "Add to table" or "View in table"" to show Table widget within sidebar. Also supports auto-expansion for widget controllers.
Comes from an idea and great solution by @JeffreyThompson2 at The Automatically Opening Attribute Table.
