Block Editor: Auto Expand Advanced & All Sidebar Panels [SnipSnip.pro] - When using Gutenberg Block Editor, anytime the content in the sidebar changes, any panels that are closed will open automatically - https://snipsnip.pro/s/751

block-editor-auto-expand-advanced-all-sidebar-panels-snipsnip-pro-.code-snippets.json

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  "generator": "Code Snippets v3.4.2.2",
  "date_created": "2023-08-08 16:17",
  "snippets": [
    {
      "id": 53,
      "name": "Block Editor: Auto Expand Advanced & All Sidebar Panels [SnipSnip.pro]",
      "desc": "<p>Block Editor: Auto Expand Advanced &amp; All Sidebar Panels [SnipSnip.pro] - When using Block Editor, anytime the content in the sidebar changes, any panels that are closed will open automatically. <a href=\"https://snipsnip.pro/s/751\">https://snipsnip.pro/s/751</a></p>",
      "code": "if (!class_exists('Expand_Sidebar_Panels_On_Mutation')) {\n  class Expand_Sidebar_Panels_On_Mutation {\n    public function __construct() {\n      add_action('admin_footer', array($this, 'add_inline_script'));\n    }\n\n    public function add_inline_script() {\n      if (!function_exists('\\get_current_screen')) {\n        return false;\n      }\n      $screen = \\get_current_screen();\n      if (method_exists($screen, 'is_block_editor') && $screen->is_block_editor()) {\n        ?>\n        <script type=\"text/javascript\">\n      setTimeout(() => {\n\n        (function () {\n            function expandPanels() {\n                const panelBodies = document.querySelectorAll('div.components-panel__body:not(.is-opened)');\n                panelBodies.forEach((panelBody) => {\n                    const buttons = panelBody.querySelectorAll('button.components-button');\n                    buttons.forEach((button) => button.click());\n                });\n            }\n\n            let activeTimer = null;\n            let observer = null;\n\n            function setupObserver() {\n                const targetElement = document.querySelector('div.interface-navigable-region.interface-interface-skeleton__sidebar');\n\n                if (targetElement) {\n                    if (observer) {\n                        observer.disconnect();\n                    }\n\n                    observer = new MutationObserver((mutationsList, observer) => {\n                        for (let mutation of mutationsList) {\n                            // Check if the mutation or its descendants match your desired criteria\n                            if (mutation.type === 'childList' && mutation.target.classList.contains('block-editor-block-inspector')) {\n                                if (activeTimer) {\n                                    clearTimeout(activeTimer);\n                                }\n                                activeTimer = setTimeout(expandPanels, 500);\n                            }\n                        }\n                    });\n\n                    observer.observe(targetElement, { childList: true, subtree: true });\n                } else {\n                    setTimeout(setupObserver, 100);\n                }\n            }\n\n            setupObserver();\n            console.log(\"Block Editor: Auto Expand Advanced & All Sidebar Panels [SnipSnip.pro]\");\n        })();\n\n      }, 7373);\n        </script>\n        <?php\n      }\n    }\n  }\n\n  new Expand_Sidebar_Panels_On_Mutation();\n}\n",
      "tags": [
        "admin",
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        "SnipSnip.pro",
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      "scope": "admin",
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      "modified": "2023-08-08 16:17:40"
    }
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block-editor-auto-expand-advanced-all-sidebar-panels-snipsnip-pro-.code-snippets.php

<?php

/**
 * Block Editor: Auto Expand Advanced & All Sidebar Panels [SnipSnip.pro]
 *
 * Block Editor: Auto Expand Advanced &amp; All Sidebar Panels [SnipSnip.pro] - When using Block Editor, anytime the content in the sidebar changes, any panels that are closed will open automatically. https://snipsnip.pro/s/751
 */
if (!class_exists('Expand_Sidebar_Panels_On_Mutation')) {
  class Expand_Sidebar_Panels_On_Mutation {
    public function __construct() {
      add_action('admin_footer', array($this, 'add_inline_script'));
    }

    public function add_inline_script() {
      if (!function_exists('\get_current_screen')) {
        return false;
      }
      $screen = \get_current_screen();
      if (method_exists($screen, 'is_block_editor') && $screen->is_block_editor()) {
        ?>
        <script type="text/javascript">
      setTimeout(() => {

        (function () {
            function expandPanels() {
                const panelBodies = document.querySelectorAll('div.components-panel__body:not(.is-opened)');
                panelBodies.forEach((panelBody) => {
                    const buttons = panelBody.querySelectorAll('button.components-button');
                    buttons.forEach((button) => button.click());
                });
            }

            let activeTimer = null;
            let observer = null;

            function setupObserver() {
                const targetElement = document.querySelector('div.interface-navigable-region.interface-interface-skeleton__sidebar');

                if (targetElement) {
                    if (observer) {
                        observer.disconnect();
                    }

                    observer = new MutationObserver((mutationsList, observer) => {
                        for (let mutation of mutationsList) {
                            // Check if the mutation or its descendants match your desired criteria
                            if (mutation.type === 'childList' && mutation.target.classList.contains('block-editor-block-inspector')) {
                                if (activeTimer) {
                                    clearTimeout(activeTimer);
                                }
                                activeTimer = setTimeout(expandPanels, 500);
                            }
                        }
                    });

                    observer.observe(targetElement, { childList: true, subtree: true });
                } else {
                    setTimeout(setupObserver, 100);
                }
            }

            setupObserver();
            console.log("Block Editor: Auto Expand Advanced & All Sidebar Panels [SnipSnip.pro]");
        })();

      }, 7373);
        </script>
        <?php
      }
    }
  }

  new Expand_Sidebar_Panels_On_Mutation();
}

I hate clicking "Advanced" in the Block Editor, so after a couple old versions, I think I've finally landed on this solution which watches for the sidebar content to change and expands the Advanced (or any other) sections automatically.
Read all about on a blog post here: https://snipsnip.pro/s/751

OMG ... you are a life-saver. Gutenberg editing gets tedious as hell and on my multilingual site I always need the advanced tab open so I can set the dir attribute on blocks. Bonus points for the Code Snippets JSON. *****