chore: migrate many of our interactive scripts to defer

public/scripts/backbtn.js

@@ -0,0 +1,26 @@
+/* AFTER CHANGING THIS FILE, PLEASE MANUALLY MINIFY IT AND PUT INTO backbtn.min.js */
+/* TODO: Add minifier to build script */
+window.onload = () => {
+    const backBtn = document.querySelector('#backbtn');
+
+    let hasHistory = false;
+    window.addEventListener('beforeunload', () => {
+        hasHistory = true;
+    })
+
+    backBtn.addEventListener('click', () => {
+        if (!document.referrer) {
+            // This is the first page the user has visited on the site in this session
+            window.location.href = '/';
+            return;
+        }
+        history.back();
+
+        // User cannot go back, meaning that we're at the first page of the site session             
+        setTimeout(() => {
+            if (!hasHistory){
+                window.location.href = "/";
+            }
+        }, 200);
+    })
+}

public/scripts/backbtn.min.js

@@ -0,0 +1 @@
+window.onload=()=>{let e=document.querySelector("#backbtn"),r=!1;window.addEventListener("beforeunload",()=>{r=!0}),e.addEventListener("click",()=>{if(!document.referrer){window.location.href="/";return}history.back(),setTimeout(()=>{r||(window.location.href="/")},200)})};

public/scripts/tabs.js

@@ -0,0 +1,167 @@
+/* AFTER CHANGING THIS FILE, PLEASE MANUALLY MINIFY IT AND PUT INTO tabs.min.js */
+
+const LOCAL_STORAGE_KEY = "tabs-selection";
+
+window.addEventListener('DOMContentLoaded', () => {
+    const tabLists = document.querySelectorAll('[role="tablist"]');
+
+    tabLists.forEach(tabList => {
+        /**
+         * @type {NodeListOf<HTMLElement>}
+         */
+        const tabs = tabList.querySelectorAll('[role="tab"]');
+
+        // Add a click event handler to each tab
+        tabs.forEach((tab) => {
+            tab.addEventListener('click', e => {
+                /**
+                 * @type {HTMLElement}
+                 */
+                const target = e.target;
+                // Scroll onto screen in order to avoid jumping page locations
+                setTimeout(() => {
+                    target.scrollIntoView({
+                        behavior: "auto",
+                        block: "center",
+                        inline: "center",
+                    });
+                }, 0);
+                changeTabs({ target })
+            });
+        });
+
+        // Enable arrow navigation between tabs in the tab list
+        let tabFocus = 0;
+
+        tabList.addEventListener('keydown', (_e) => {
+            /**
+             * @type {KeyboardEvent}
+             */
+            const e = _e;
+            // Move right
+            if (e.keyCode === 39 || e.keyCode === 37) {
+                tabs[tabFocus].setAttribute('tabindex', `-1`);
+                if (e.keyCode === 39) {
+                    tabFocus++;
+                    // If we're at the end, go to the start
+                    if (tabFocus >= tabs.length) {
+                        tabFocus = 0;
+                    }
+                    // Move left
+                } else if (e.keyCode === 37) {
+                    tabFocus--;
+                    // If we're at the start, move to the end
+                    if (tabFocus < 0) {
+                        tabFocus = tabs.length - 1;
+                    }
+                }
+
+                tabs[tabFocus].setAttribute('tabindex', `0`);
+                tabs[tabFocus].focus();
+                tabs[tabFocus].click();
+            }
+        });
+    });
+
+    const currentTab = localStorage.getItem(LOCAL_STORAGE_KEY);
+    if (currentTab) {
+        /**
+         * @type {HTMLElement}
+         */
+        const el = document.querySelector(`[data-tabname="${currentTab}"]`);
+        if (el) changeTabs({ target: el });
+    }
+
+    function changeTabs(_e) {
+        /**
+         * @type {{ target: HTMLElement }}
+         */
+        const e = _e;
+        const target = e.target;
+        const parent = target.parentNode;
+        const grandparent = parent.parentNode;
+
+        // Remove all current selected tabs
+        parent
+            .querySelectorAll('[aria-selected="true"]')
+            .forEach((t) => t.setAttribute('aria-selected', `false`));
+
+        // Set this tab as selected
+        target.setAttribute('aria-selected', `true`);
+
+        const tabName = target.dataset.tabname;
+        /**
+         * @type {NodeListOf<HTMLElement>}
+         */
+        const relatedTabs = document.querySelectorAll(`[role="tab"][data-tabname="${target.dataset.tabname}"]`);
+
+        localStorage.setItem(LOCAL_STORAGE_KEY, tabName);
+
+        for (let relatedTab of relatedTabs) {
+            if (relatedTab === target) continue;
+            changeTabs({ target: relatedTab });
+        }
+
+        // Hide all tab panels
+        grandparent
+            .querySelectorAll('[role="tabpanel"]')
+            .forEach((p) => p.setAttribute('hidden', `true`));
+
+        // Show the selected panel
+        grandparent.parentNode
+            .querySelector(`#${target.getAttribute('aria-controls')}`)
+            .removeAttribute('hidden');
+    }
+
+    /* -------------------- */
+
+    /**
+     * 
+     * @param {HTMLElement} el 
+     * @param {(el: HTMLElement) => boolean} check 
+     * @returns {boolean}
+     */
+    function checkElementsParents(el, check) {
+        if (el.parentElement) {
+            if (!check(el.parentElement)) {
+                return checkElementsParents(el.parentElement, check);
+            } else {
+                return true;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    (() => {
+        // If user has linked to a heading that's inside of a tab
+        const hash = window.location.hash;
+        if (!hash) return;
+        const heading = document.querySelector < HTMLElement > (hash);
+        if (!heading) return;
+        const isHidden = checkElementsParents(heading, el =>
+            el.hasAttribute('hidden') && el.getAttribute('hidden') !== "false"
+        )
+        // If it's not hidden, then we can assume that the browser will auto-scroll to it
+        if (!isHidden) return;
+        const partialHash = hash.slice(1);
+        try {
+            const matchingTab = document.querySelector < HTMLElement > (
+                `[data-headers*="${partialHash}"`
+            );
+            if (!matchingTab) return;
+            // If header is not in a tab
+            const tabName = matchingTab.getAttribute("data-tabname");
+            if (!tabName) return;
+            matchingTab.click();
+            setTimeout(() => {
+                const el = document.querySelector(hash);
+                if (!el) return;
+                el.scrollIntoView(true);
+            }, 0);
+        } catch (e) {
+            console.error("Error finding matching tab", e);
+        }
+    })()
+
+});

public/scripts/tabs.min.js

@@ -0,0 +1 @@
+const LOCAL_STORAGE_KEY="tabs-selection";window.addEventListener("DOMContentLoaded",()=>{let e=document.querySelectorAll('[role="tablist"]');e.forEach(e=>{let t=e.querySelectorAll('[role="tab"]');t.forEach(e=>{e.addEventListener("click",e=>{let t=e.target;setTimeout(()=>{t.scrollIntoView({behavior:"auto",block:"center",inline:"center"})},0),a({target:t})})});let r=0;e.addEventListener("keydown",e=>{let a=e;(39===a.keyCode||37===a.keyCode)&&(t[r].setAttribute("tabindex","-1"),39===a.keyCode?++r>=t.length&&(r=0):37===a.keyCode&&--r<0&&(r=t.length-1),t[r].setAttribute("tabindex","0"),t[r].focus(),t[r].click())})});let t=localStorage.getItem(LOCAL_STORAGE_KEY);if(t){let r=document.querySelector(`[data-tabname="${t}"]`);r&&a({target:r})}function a(e){let t=e.target,r=t.parentNode,l=r.parentNode;r.querySelectorAll('[aria-selected="true"]').forEach(e=>e.setAttribute("aria-selected","false")),t.setAttribute("aria-selected","true");let n=t.dataset.tabname,o=document.querySelectorAll(`[role="tab"][data-tabname="${t.dataset.tabname}"]`);for(let i of(localStorage.setItem(LOCAL_STORAGE_KEY,n),o))i!==t&&a({target:i});l.querySelectorAll('[role="tabpanel"]').forEach(e=>e.setAttribute("hidden","true")),l.parentNode.querySelector(`#${t.getAttribute("aria-controls")}`).removeAttribute("hidden")}function l(e,t){return!!e.parentElement&&(!!t(e.parentElement)||l(e.parentElement,t))}(()=>{let e=window.location.hash;if(!e)return;let t=document.querySelector<HTMLElement>e;if(!t)return;let r=l(t,e=>e.hasAttribute("hidden")&&"false"!==e.getAttribute("hidden"));if(!r)return;let a=e.slice(1);try{let n=document.querySelector<HTMLElement>`[data-headers*="${a}"`;if(!n)return;let o=n.getAttribute("data-tabname");if(!o)return;n.click(),setTimeout(()=>{let t=document.querySelector(e);t&&t.scrollIntoView(!0)},0)}catch(i){console.error("Error finding matching tab",i)}})()});

public/scripts/themetoggle.js

@@ -0,0 +1,28 @@
+/* AFTER CHANGING THIS FILE, PLEASE MANUALLY MINIFY IT AND PUT INTO tabs.min.js */
+const COLOR_MODE_STORAGE_KEY = "currentTheme";
+
+const themeToggleBtn = document.querySelector('#theme-toggle-button');
+const darkIconEl = document.querySelector('#dark-icon');
+const lightIconEl = document.querySelector('#light-icon');
+function toggleButton(theme) {
+  themeToggleBtn.ariaPressed = `${theme === 'dark'}`;
+  if (theme === 'light') {
+    lightIconEl.style.display = null;
+    darkIconEl.style.display = 'none';
+  } else {
+    lightIconEl.style.display = 'none';
+    darkIconEl.style.display = null;
+  }
+}
+
+// TODO: Migrate to `classList`
+const initialTheme = document.documentElement.className;
+toggleButton(initialTheme);
+themeToggleBtn.addEventListener('click', () => {
+  const currentTheme = document.documentElement.className;
+  document.documentElement.className = currentTheme === 'light' ? 'dark' : 'light';
+  // TODO: Persist new setting
+  const newTheme = document.documentElement.className;
+  toggleButton(newTheme);
+  localStorage.setItem(COLOR_MODE_STORAGE_KEY, newTheme)
+})

public/scripts/themetoggle.min.js

@@ -0,0 +1 @@
+const COLOR_MODE_STORAGE_KEY="currentTheme",themeToggleBtn=document.querySelector("#theme-toggle-button"),darkIconEl=document.querySelector("#dark-icon"),lightIconEl=document.querySelector("#light-icon");function toggleButton(e){themeToggleBtn.ariaPressed=`${"dark"===e}`,"light"===e?(lightIconEl.style.display=null,darkIconEl.style.display="none"):(lightIconEl.style.display="none",darkIconEl.style.display=null)}const initialTheme=document.documentElement.className;toggleButton(initialTheme),themeToggleBtn.addEventListener("click",()=>{let e=document.documentElement.className;document.documentElement.className="light"===e?"dark":"light";let t=document.documentElement.className;toggleButton(t),localStorage.setItem("currentTheme",t)});

src/components/dark-light-button/dark-light-button.astro

@@ -1,11 +1,6 @@
 ---
 import { Icon } from 'astro-icon';
 import btnStyles from "./dark-light-button.module.scss";
-
-import {
-  COLOR_MODE_STORAGE_KEY,
-} from "constants/index";
-
 ---
 
 <button
@@ -18,32 +13,4 @@ import {
   <Icon name="light" height="36" width="36" id="light-icon" style="display: none;"/>
 </button>
 
-<!-- DO NOT SWITCH THE ORDER OF THESE TWO TAGS, IT WILL BREAK FUNCTIONALITY -->
-
-<script is:inline define:vars={{COLOR_MODE_STORAGE_KEY}}>
-const themeToggleBtn = document.querySelector('#theme-toggle-button');
-const darkIconEl = document.querySelector('#dark-icon');
-const lightIconEl = document.querySelector('#light-icon');
-function toggleButton(theme) {
-  themeToggleBtn.ariaPressed = `${theme === 'dark'}`;
-  if (theme === 'light') {
-    lightIconEl.style.display = null;
-    darkIconEl.style.display = 'none';
-  } else {
-    lightIconEl.style.display = 'none';
-    darkIconEl.style.display = null;
-  }
-}
-
-// TODO: Migrate to `classList`
-const initialTheme = document.documentElement.className;
-toggleButton(initialTheme);
-themeToggleBtn.addEventListener('click', () => {
-  const currentTheme = document.documentElement.className;
-  document.documentElement.className = currentTheme === 'light' ? 'dark' : 'light';
-  // TODO: Persist new setting
-  const newTheme = document.documentElement.className;
-  toggleButton(newTheme);
-  localStorage.setItem(COLOR_MODE_STORAGE_KEY, newTheme)
-})
-</script>
+<script defer is:inline src="/scripts/themetoggle.min.js"/>

src/components/layout/layout.astro

@@ -19,30 +19,7 @@ const isCollection = Astro.url.pathname.startsWith(`${rootPath}collections`);
             <button id="backbtn" class={`${layoutStyles.backBtn} baseBtn`} aria-label="Go back">
                 <Icon height="36" width="36" name="back" />
             </button>
-            <script is:inline>
-                const backBtn = document.querySelector('#backbtn');
-
-                let hasHistory = false;
-                window.addEventListener('beforeunload', () => {
-                    hasHistory = true;
-                })
-
-                backBtn.addEventListener('click', () => {
-                    if (!document.referrer) {
-                        // This is the first page the user has visited on the site in this session
-                        window.location.href = '/';
-                        return;
-                    }
-                    history.back();
-
-                    // User cannot go back, meaning that we're at the first page of the site session             
-                    setTimeout(() => {
-                        if (!hasHistory){
-                            window.location.href = "/";
-                        }
-                    }, 200);
-                })
-            </script>
+            <script is:inline defer src="/scripts/backbtn.min.js"/>
             </>
             ) : (
             <div />

src/page-components/blog-post/tabs-script/tabs-script.astro

@@ -1,144 +1,4 @@
 ---
 ---
 
-<script>
-    const LOCAL_STORAGE_KEY = "tabs-selection";
-
-    window.addEventListener('DOMContentLoaded', () => {
-        const tabLists = document.querySelectorAll('[role="tablist"]');
-
-        tabLists.forEach(tabList => {
-            const tabs = tabList.querySelectorAll('[role="tab"]') as NodeListOf<HTMLElement>;
-
-            // Add a click event handler to each tab
-            tabs.forEach((tab) => {
-                tab.addEventListener('click', e => {
-                    const target = e.target as HTMLElement;
-                    // Scroll onto screen in order to avoid jumping page locations
-                    setTimeout(() => {
-                        target.scrollIntoView({
-                            behavior: "auto",
-                            block: "center",
-                            inline: "center",
-                        });
-                    }, 0);
-                    changeTabs({ target })
-                });
-            });
-
-            // Enable arrow navigation between tabs in the tab list
-            let tabFocus = 0;
-
-            tabList.addEventListener('keydown', (e: KeyboardEvent) => {
-                // Move right
-                if (e.keyCode === 39 || e.keyCode === 37) {
-                    tabs[tabFocus].setAttribute('tabindex', `-1`);
-                    if (e.keyCode === 39) {
-                        tabFocus++;
-                        // If we're at the end, go to the start
-                        if (tabFocus >= tabs.length) {
-                            tabFocus = 0;
-                        }
-                        // Move left
-                    } else if (e.keyCode === 37) {
-                        tabFocus--;
-                        // If we're at the start, move to the end
-                        if (tabFocus < 0) {
-                            tabFocus = tabs.length - 1;
-                        }
-                    }
-
-                    tabs[tabFocus].setAttribute('tabindex', `0`);
-                    tabs[tabFocus].focus();
-                    tabs[tabFocus].click();
-                }
-            });
-        });
-
-        const currentTab = localStorage.getItem(LOCAL_STORAGE_KEY);
-        if (currentTab) {
-            const el = document.querySelector(`[data-tabname="${currentTab}"]`) as HTMLElement;
-            if (el) changeTabs({target: el});
-        }
-
-        function changeTabs(e: { target: HTMLElement }) {
-            const target = e.target;
-            const parent = target.parentNode;
-            const grandparent = parent.parentNode;
-
-            // Remove all current selected tabs
-            parent
-                .querySelectorAll('[aria-selected="true"]')
-                .forEach((t) => t.setAttribute('aria-selected', `false`));
-
-            // Set this tab as selected
-            target.setAttribute('aria-selected', `true`);
-
-            const tabName = target.dataset.tabname;
-            const relatedTabs: NodeListOf<HTMLElement> = document.querySelectorAll(`[role="tab"][data-tabname="${target.dataset.tabname}"]`);
-
-            localStorage.setItem(LOCAL_STORAGE_KEY, tabName);
-
-            for (let relatedTab of relatedTabs) {
-                if (relatedTab === target) continue;
-                changeTabs({target: relatedTab});
-            }
-
-            // Hide all tab panels
-            grandparent
-                .querySelectorAll('[role="tabpanel"]')
-                .forEach((p) => p.setAttribute('hidden', `true`));
-
-            // Show the selected panel
-            grandparent.parentNode
-                .querySelector(`#${target.getAttribute('aria-controls')}`)
-                .removeAttribute('hidden');
-        }
-
-        /* -------------------- */
-
-        function checkElementsParents(el: HTMLElement, check: (el: HTMLElement) => boolean): boolean {
-            if (el.parentElement) {
-                if (!check(el.parentElement)) {
-                    return checkElementsParents(el.parentElement, check);
-                } else {
-                    return true;
-                }
-            } else {
-                return false;
-            }
-        }
-
-        (() => {
-            // If user has linked to a heading that's inside of a tab
-            const hash = window.location.hash;
-            if (!hash) return;
-            const heading = document.querySelector<HTMLElement>(hash);
-            if (!heading) return;
-            const isHidden = checkElementsParents(heading, el =>
-                el.hasAttribute('hidden') && el.getAttribute('hidden') !== "false"
-            )
-            // If it's not hidden, then we can assume that the browser will auto-scroll to it
-            if (!isHidden) return;
-            const partialHash = hash.slice(1);
-            try {
-                const matchingTab = document.querySelector<HTMLElement>(
-                    `[data-headers*="${partialHash}"`
-                );
-                if (!matchingTab) return;
-                // If header is not in a tab
-                const tabName = matchingTab.getAttribute("data-tabname");
-                if (!tabName) return;
-                matchingTab.click();
-                setTimeout(() => {
-                    const el = document.querySelector(hash);
-                    if (!el) return;
-                    el.scrollIntoView(true);
-                }, 0);
-            } catch (e) {
-                console.error("Error finding matching tab", e);
-            }
-        })()
-
-    });
-</script>
+<script is:inline defer src="/scripts/tabs.min.js"/>