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‎404.html‎

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<!doctype html>
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<html lang="en" dir="ltr" class="plugin-native plugin-id-default" data-has-hydrated="false">
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<head>
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<meta charset="UTF-8">
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<meta name="generator" content="Docusaurus v3.9.2">
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<title data-rh="true">Page Not Found | Perspective</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://perspective-dev.github.io/404.html/"><meta data-rh="true" property="og:locale" content="en"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docusaurus_tag" content="default"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docsearch:docusaurus_tag" content="default"><meta data-rh="true" property="og:title" content="Page Not Found | Perspective"><link data-rh="true" rel="icon" href="https://openjsf.org/favicon.ico"><link data-rh="true" rel="canonical" href="https://perspective-dev.github.io/404.html/"><link data-rh="true" rel="alternate" href="https://perspective-dev.github.io/404.html/" hreflang="en"><link data-rh="true" rel="alternate" href="https://perspective-dev.github.io/404.html/" hreflang="x-default"><link rel="stylesheet" href="/assets/css/styles.834ae233.css">
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<script src="/assets/js/runtime~main.c7cd2724.js" defer="defer"></script>
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<script src="/assets/js/main.6e113dca.js" defer="defer"></script>
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</head>
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<body class="navigation-with-keyboard">
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<svg style="display: none;"><defs>
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<symbol id="theme-svg-external-link" viewBox="0 0 24 24"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"/></symbol>
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</defs></svg>
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<script>!function(){var t=function(){try{return new URLSearchParams(window.location.search).get("docusaurus-theme")}catch(t){}}()||function(){try{return window.localStorage.getItem("theme")}catch(t){}}();document.documentElement.setAttribute("data-theme",t||"dark"),document.documentElement.setAttribute("data-theme-choice",t||"dark")}(),function(){try{const c=new URLSearchParams(window.location.search).entries();for(var[t,e]of c)if(t.startsWith("docusaurus-data-")){var a=t.replace("docusaurus-data-","data-");document.documentElement.setAttribute(a,e)}}catch(t){}}()</script><div id="__docusaurus"><div role="region" aria-label="Skip to main content"><a class="skipToContent_Q_9i" href="#__docusaurus_skipToContent_fallback">Skip to main content</a></div><nav aria-label="Main" class="theme-layout-navbar navbar navbar--fixed-top"><div class="navbar__inner"><div class="theme-layout-navbar-left navbar__items"><button aria-label="Toggle navigation bar" aria-expanded="false" class="navbar__toggle clean-btn" type="button"><svg width="30" height="30" viewBox="0 0 30 30" aria-hidden="true"><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></button><a class="navbar__brand" href="/"><div class="navbar__logo"><img src="/svg/perspective-logo-light.svg" alt="Perspective" class="themedComponent_xk3r themedComponent--light_AOFg"><img src="/svg/perspective-logo-light.svg" alt="Perspective" class="themedComponent_xk3r themedComponent--dark_lAB1"></div></a></div><div class="theme-layout-navbar-right navbar__items navbar__items--right"><div class="navbar__item dropdown dropdown--hoverable dropdown--right"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link">Docs</a><ul class="dropdown__menu"><li class=""><a class="dropdown__link" style="font-size:16px;padding:0.25rem 0rem" href="/guide/">User Guide</a></li><li class=""><span style="user-select:none">Python API</span></li><li class=""><a class="dropdown__link" href="/python/"><code>perspective</code></a></li><li class=""><a class="dropdown__link" href="/python/perspective/widget.html"><code>perspective.widget</code></a></li><li class=""><a class="dropdown__link" href="/python/perspective/handlers/aiohttp.html"><code>perspective.handlers.aiohttp</code></a></li><li class=""><a class="dropdown__link" href="/python/perspective/handlers/starlette.html"><code>perspective.handlers.starlette</code></a></li><li class=""><a class="dropdown__link" href="/python/perspective/handlers/tornado.html"><code>perspective.handlers.tornado</code></a></li><li class=""><span style="user-select:none">JavaScript API</span></li><li class=""><a class="dropdown__link" href="/browser/modules/src_ts_perspective.browser.ts.html"> <code>@perspective-dev/client</code> Browser</a></li><li class=""><a class="dropdown__link" href="/node/modules/src_ts_perspective.node.ts.html"> <code>@perspective-dev/client</code> Node.js</a></li><li class=""><a class="dropdown__link" href="/viewer/modules/perspective-viewer.html"> <code>@perspective-dev/viewer</code></a></li><li class=""><a class="dropdown__link" href="/react/index.html"> <code>@perspective-dev/react</code></a></li><li class=""><span style="user-select:none">Rust API</span></li><li class=""><a class="dropdown__link" href="https://docs.rs/perspective/latest/perspective/"><code>perspective</code></a></li><li class=""><a class="dropdown__link" href="https://docs.rs/perspective-client/latest/perspective_client/"><code>perspective-client</code></a></li><li class=""><a class="dropdown__link" href="https://docs.rs/perspective-server/latest/perspective_server/"><code>perspective-server</code></a></li><li class=""><a class="dropdown__link" href="https://docs.rs/perspective-js/latest/perspective_js/"><code>perspective-js</code></a></li><li class=""><a class="dropdown__link" href="https://docs.rs/perspective-python/latest/perspective_python/"><code>perspective-python</code></a></li><li class=""><a class="dropdown__link" href="https://docs.rs/perspective-viewer/latest/perspective_viewer/"><code>perspective-viewer</code></a></li></ul></div><a class="navbar__item navbar__link" href="/examples/">Examples</a><a href="https://github.com/perspective-dev/perspective" target="_blank" rel="noopener noreferrer" class="navbar__item navbar__link">GitHub<svg width="13.5" height="13.5" aria-label="(opens in new tab)" class="iconExternalLink_m07b"><use href="#theme-svg-external-link"></use></svg></a><div class="toggle_oqiV colorModeToggle_zCJm"><button class="clean-btn toggleButton_AR1n toggleButtonDisabled_sTWs" type="button" disabled="" title="system mode" aria-label="Switch between dark and light mode (currently system mode)"><svg viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" class="toggleIcon_niRn lightToggleIcon_NKcQ"><path fill="currentColor" d="M12,9c1.65,0,3,1.35,3,3s-1.35,3-3,3s-3-1.35-3-3S10.35,9,12,9 M12,7c-2.76,0-5,2.24-5,5s2.24,5,5,5s5-2.24,5-5 S14.76,7,12,7L12,7z M2,13l2,0c0.55,0,1-0.45,1-1s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S1.45,13,2,13z M20,13l2,0c0.55,0,1-0.45,1-1 s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S19.45,13,20,13z M11,2v2c0,0.55,0.45,1,1,1s1-0.45,1-1V2c0-0.55-0.45-1-1-1S11,1.45,11,2z M11,20v2c0,0.55,0.45,1,1,1s1-0.45,1-1v-2c0-0.55-0.45-1-1-1C11.45,19,11,19.45,11,20z M5.99,4.58c-0.39-0.39-1.03-0.39-1.41,0 c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0s0.39-1.03,0-1.41L5.99,4.58z M18.36,16.95 c-0.39-0.39-1.03-0.39-1.41,0c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0c0.39-0.39,0.39-1.03,0-1.41 L18.36,16.95z M19.42,5.99c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06c-0.39,0.39-0.39,1.03,0,1.41 s1.03,0.39,1.41,0L19.42,5.99z M7.05,18.36c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06 c-0.39,0.39-0.39,1.03,0,1.41s1.03,0.39,1.41,0L7.05,18.36z"></path></svg><svg viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" class="toggleIcon_niRn darkToggleIcon_eNTM"><path fill="currentColor" d="M9.37,5.51C9.19,6.15,9.1,6.82,9.1,7.5c0,4.08,3.32,7.4,7.4,7.4c0.68,0,1.35-0.09,1.99-0.27C17.45,17.19,14.93,19,12,19 c-3.86,0-7-3.14-7-7C5,9.07,6.81,6.55,9.37,5.51z M12,3c-4.97,0-9,4.03-9,9s4.03,9,9,9s9-4.03,9-9c0-0.46-0.04-0.92-0.1-1.36 c-0.98,1.37-2.58,2.26-4.4,2.26c-2.98,0-5.4-2.42-5.4-5.4c0-1.81,0.89-3.42,2.26-4.4C12.92,3.04,12.46,3,12,3L12,3z"></path></svg><svg viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" class="toggleIcon_niRn systemToggleIcon_xlrZ"><path fill="currentColor" d="m12 21c4.971 0 9-4.029 9-9s-4.029-9-9-9-9 4.029-9 9 4.029 9 9 9zm4.95-13.95c1.313 1.313 2.05 3.093 2.05 4.95s-0.738 3.637-2.05 4.95c-1.313 1.313-3.093 2.05-4.95 2.05v-14c1.857 0 3.637 0.737 4.95 2.05z"></path></svg></button></div><div class="navbarSearchContainer_TsHz"></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="theme-layout-main main-wrapper mainWrapper_dx1z"><main class="container margin-vert--xl"><div class="row"><div class="col col--6 col--offset-3"><h1 class="hero__title">Page Not Found</h1><p>We could not find what you were looking for.</p><p>Please contact the owner of the site that linked you to the original URL and let them know their link is broken.</p></div></div></main></div><footer class="theme-layout-footer footer"><div class="container container-fluid"><div class="footer__bottom text--center"><div class="footer__copyright">Copyright © 2025 The Perspective Authors</div></div></div></footer></div>
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</html>

‎block.html‎

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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta
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name="viewport"
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content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"
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/>
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<title>Perspective - Block</title>
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<meta
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name="description"
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content="Interactive analytics and data visualization component for large and streaming datasets."
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/>
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<link rel="icon" href="https://openjsf.org/favicon.ico" />
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<link rel="stylesheet" href="style.css" />
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</head>
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<body>
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<div class="page-container">
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<nav class="navbar">
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<div class="navbar__inner">
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<a href="/" class="navbar__logo"><img alt="Perspective" src="/svg/perspective-logo-dark.svg" /></a>
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<ul class="navbar__links">
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<li><a href="/guide/">Docs</a></li>
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<li><a href="/examples.html">Examples</a></li>
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<li>
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<a
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href="https://github.com/perspective-dev/perspective"
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>GitHub</a
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>
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</li>
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<li id="theme-toggle"></li>
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</ul>
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</div>
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</nav>
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<main class="main-wrapper">
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<div class="block-detail" id="block-detail"></div>
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<br /><br />
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</main>
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<footer class="footer">
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<div class="footer__inner">
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<img
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class="footer__logo"
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id="footer-logo"
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alt="OpenJS Foundation Logo"
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src="/img/openjs_foundation-logo-horizontal-white.png"
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/>
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<div class="footer__copyright">
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<br /><br />Copyright &copy; 2017 OpenJS Foundation and
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Perspective contributors.
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</div>
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</div>
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</footer>
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</div>
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<script type="module" src="block.js"></script>
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</body>
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</html>

‎block.js‎

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‎block.js.map‎

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‎blocks/citibike/citibike.js‎

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// ┃ of the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). ┃
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// ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer/dist/cdn/perspective-viewer.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/workspace/dist/cdn/perspective-workspace.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-datagrid/dist/cdn/perspective-viewer-datagrid.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-d3fc/dist/cdn/perspective-viewer-d3fc.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer@4.2.0/dist/cdn/perspective-viewer.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/workspace@4.2.0/dist/cdn/perspective-workspace.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-datagrid@4.2.0/dist/cdn/perspective-viewer-datagrid.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-d3fc@4.2.0/dist/cdn/perspective-viewer-d3fc.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-openlayers/dist/cdn/perspective-viewer-openlayers.js";
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import perspective from "https://cdn.jsdelivr.net/npm/@perspective-dev/client/dist/cdn/perspective.js";
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import perspective from "https://cdn.jsdelivr.net/npm/@perspective-dev/client@4.2.0/dist/cdn/perspective.js";
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// Quick wrapper function for making a GET call.
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function get(url) {

‎blocks/covid/index.html‎

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<link rel="preload" href="https://cdn.jsdelivr.net/npm/@perspective-dev/viewer/dist/wasm/perspective-viewer.wasm" as="fetch" type="application/wasm" crossorigin="anonymous" />
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<link rel="stylesheet" crossorigin="anonymous" href="https://cdn.jsdelivr.net/npm/@perspective-dev/viewer/dist/css/themes.css" />
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<script type="module">
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer/dist/cdn/perspective-viewer.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-datagrid/dist/cdn/perspective-viewer-datagrid.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-d3fc/dist/cdn/perspective-viewer-d3fc.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer@4.5.0/dist/cdn/perspective-viewer.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-datagrid@4.5.0/dist/cdn/perspective-viewer-datagrid.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-charts@4.5.0/dist/cdn/perspective-viewer-charts.js";
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import { worker } from "https://cdn.jsdelivr.net/npm/@perspective-dev/client/dist/cdn/perspective.js";
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import { worker } from "https://cdn.jsdelivr.net/npm/@perspective-dev/client@4.5.0/dist/cdn/perspective.js";
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const WORKER = await worker();
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const REQ = fetch("https://api.covidtracking.com/v1/states/daily.csv");

‎blocks/dataset/index.html‎

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</div>
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<script type="module">
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-datagrid/dist/cdn/perspective-viewer-datagrid.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-d3fc/dist/cdn/perspective-viewer-d3fc.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer/dist/cdn/perspective-viewer.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/workspace/dist/cdn/perspective-workspace.js";
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import perspective from "https://cdn.jsdelivr.net/npm/@perspective-dev/client/dist/cdn/perspective.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-datagrid@4.5.0/dist/cdn/perspective-viewer-datagrid.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer-charts@4.5.0/dist/cdn/perspective-viewer-charts.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/viewer@4.5.0/dist/cdn/perspective-viewer.js";
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import "https://cdn.jsdelivr.net/npm/@perspective-dev/workspace@4.5.0/dist/cdn/perspective-workspace.js";
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import perspective from "https://cdn.jsdelivr.net/npm/@perspective-dev/client@4.5.0/dist/cdn/perspective.js";
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const client = await perspective.worker();
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let rows = [];
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const batch_size = Math.floor(nrows / num_batches.value);
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const batch_freq = batch_delay.value;
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const tbl = await client.table(new_schema());
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const tbl = await client.table(new_schema(), { name: "superstore" });
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(function batch() {
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while (nrows > 0) {
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rows.push(new_row());
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const make_run_click_callback = (state) => async () => {
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state.table?.delete?.({ lazy: true });
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state.table = gen_data();
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await window.psp_workspace.addTable("superstore", state.table);
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// await window.psp_workspace.addTable("superstore", state.table);
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};
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const make_del_click_callback = (state) => async () => {
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if (state.table) {
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// await viewer.eject();
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await window.psp_workspace.removeTable("superstore");
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// await window.psp_workspace.removeTable("superstore");
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for (const viewer of window.psp_workspace.children) {
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const cfg = await viewer.save();
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if (cfg.table === "superstore") {
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await viewer.eject();
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}
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}
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await state.table.then((x) => x.delete({ lazy: true }));
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state.table = undefined;
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}
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},
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{
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limit: 2000,
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name: "stats",
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},
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);
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window.psp_workspace.addTable("stats", stats_table);
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(async function checkmem() {
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(async function check_mem_loop() {
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await stats_table.update([await client.system_info()]);
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setTimeout(checkmem, 200);
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setTimeout(check_mem_loop, 200);
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})();
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window.psp_workspace.restore(await fetch("layout.json").then((x) => x.json()));
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await window.psp_workspace.load(client);
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await window.psp_workspace.restore(await fetch("layout.json").then((x) => x.json()));
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</script>
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</body>
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</html>

‎blocks/dataset/layout.json‎

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},
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"viewers": {
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"PERSPECTIVE_GENERATED_ID_0": {
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"version": "3.8.0",
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"version": "4.5.0",
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"plugin": "Datagrid",
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"plugin_config": {
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"columns": {},
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"settings": false
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},
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"PERSPECTIVE_GENERATED_ID_1": {
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"version": "3.8.0",
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"version": "4.5.0",
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"plugin": "Y Area",
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"plugin_config": {},
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"columns_config": {},
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"aggregates": {}
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},
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"PERSPECTIVE_GENERATED_ID_2": {
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"version": "3.8.0",
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"version": "4.5.0",
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"plugin": "Y Line",
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"plugin_config": {},
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"columns_config": {},

‎blocks/duckdb/README.md‎

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An example of [Perspective](https://github.com/perspective-dev/perspective)
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using [DuckDB WASM](https://duckdb.org/docs/api/wasm/overview) as a virtual
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server backend via the `DuckDBHandler` adapter.
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Instead of using Perspective's built-in WebAssembly query engine, this example
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demonstrates how to use DuckDB as the data processing layer while still
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leveraging Perspective's visualization components. The `DuckDBHandler` translates
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Perspective's view configuration (group by, split by, sort, filter, expressions,
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aggregates) into DuckDB SQL queries, enabling Perspective to query data stored
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in DuckDB tables.
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This example loads the Superstore sample dataset into a DuckDB table, then
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creates a Perspective viewer that queries the data through the DuckDB virtual
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server. A separate log viewer displays the SQL queries being generated in
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real-time, along with a timeline chart showing query frequency.

‎blocks/duckdb/index.css‎

Whitespace-only changes.

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