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<!DOCTYPE html><html lang="en-US"><head><title>Explode the Web!</title><meta property="og:title" content="Explode the Web!"><meta name="author" content="Owen Mundy"><meta property="article:author" content="Owen Mundy"><meta name="keywords" content="computing,proficiency,browser extensions"><meta charset="UTF-8"><meta name="viewport" content="width=device-width,height=device-height,initial-scale=1.0"><meta name="apple-mobile-web-app-capable" content="yes"><meta http-equiv="X-UA-Compatible" content="ie=edge"><meta property="og:type" content="website"><meta name="twitter:card" content="summary"><style>@media screen{body[data-bespoke-view=""] .bespoke-marp-parent>.bespoke-marp-osc>button,body[data-bespoke-view=next] .bespoke-marp-parent>.bespoke-marp-osc>button,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container button,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container button{-webkit-tap-highlight-color:transparent;-webkit-appearance:none;appearance:none;background-color:initial;border:0;color:inherit;cursor:pointer;font-size:inherit;opacity:.8;outline:none;padding:0;transition:opacity .2s linear}body[data-bespoke-view=""] .bespoke-marp-parent>.bespoke-marp-osc>button:disabled,body[data-bespoke-view=next] .bespoke-marp-parent>.bespoke-marp-osc>button:disabled,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container button:disabled,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container button:disabled{cursor:not-allowed;opacity:.15!important}body[data-bespoke-view=""] .bespoke-marp-parent>.bespoke-marp-osc>button:hover,body[data-bespoke-view=next] .bespoke-marp-parent>.bespoke-marp-osc>button:hover,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container button:hover,body[data-bespoke-view=presenter] 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/*!
* Marp default theme.
*
* @theme default
* @author Yuki Hattori
*
* @auto-scaling true
* @size 16:9 1280px 720px
* @size 4:3 960px 720px
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.pl-c2{background-color:var(--color-prettylights-syntax-carriage-return-bg);color:var(--color-prettylights-syntax-carriage-return-text)}div#\:\$p>svg>foreignObject>section .pl-sr .pl-cce{color:var(--color-prettylights-syntax-string-regexp);font-weight:700}div#\:\$p>svg>foreignObject>section .pl-ml{color:var(--color-prettylights-syntax-markup-list)}div#\:\$p>svg>foreignObject>section .pl-mh,div#\:\$p>svg>foreignObject>section .pl-mh .pl-en,div#\:\$p>svg>foreignObject>section .pl-ms{color:var(--color-prettylights-syntax-markup-heading);font-weight:700}div#\:\$p>svg>foreignObject>section .pl-mi{color:var(--color-prettylights-syntax-markup-italic);font-style:italic}div#\:\$p>svg>foreignObject>section .pl-mb{color:var(--color-prettylights-syntax-markup-bold);font-weight:700}div#\:\$p>svg>foreignObject>section .pl-md{background-color:var(--color-prettylights-syntax-markup-deleted-bg);color:var(--color-prettylights-syntax-markup-deleted-text)}div#\:\$p>svg>foreignObject>section .pl-mi1{background-color:var(--color-prettylights-syntax-markup-inserted-bg);color:var(--color-prettylights-syntax-markup-inserted-text)}div#\:\$p>svg>foreignObject>section .pl-mc{background-color:var(--color-prettylights-syntax-markup-changed-bg);color:var(--color-prettylights-syntax-markup-changed-text)}div#\:\$p>svg>foreignObject>section .pl-mi2{background-color:var(--color-prettylights-syntax-markup-ignored-bg);color:var(--color-prettylights-syntax-markup-ignored-text)}div#\:\$p>svg>foreignObject>section .pl-mdr{color:var(--color-prettylights-syntax-meta-diff-range);font-weight:700}div#\:\$p>svg>foreignObject>section .pl-ba{color:var(--color-prettylights-syntax-brackethighlighter-angle)}div#\:\$p>svg>foreignObject>section .pl-sg{color:var(--color-prettylights-syntax-sublimelinter-gutter-mark)}div#\:\$p>svg>foreignObject>section .pl-corl{color:var(--color-prettylights-syntax-constant-other-reference-link);text-decoration:underline}div#\:\$p>svg>foreignObject>section g-emoji{display:inline-block;font-family:Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol;font-size:1em;font-style:normal!important;font-weight:var(--base-text-weight-normal,400);line-height:1;min-width:1ch;vertical-align:-.075em}div#\:\$p>svg>foreignObject>section g-emoji img{height:1em;width:1em}div#\:\$p>svg>foreignObject>section .task-list-item{list-style-type:none}div#\:\$p>svg>foreignObject>section .task-list-item label{font-weight:var(--base-text-weight-normal,400)}div#\:\$p>svg>foreignObject>section .task-list-item.enabled label{cursor:pointer}div#\:\$p>svg>foreignObject>section .task-list-item+.task-list-item{margin-top:4px}div#\:\$p>svg>foreignObject>section .task-list-item .handle{display:none}div#\:\$p>svg>foreignObject>section .task-list-item-checkbox{margin:0 .2em .25em -1.4em;vertical-align:middle}div#\:\$p>svg>foreignObject>section .contains-task-list:dir(rtl) .task-list-item-checkbox{margin:0 -1.6em .25em .2em}div#\:\$p>svg>foreignObject>section .contains-task-list{position:relative}div#\:\$p>svg>foreignObject>section .contains-task-list:focus-within .task-list-item-convert-container,div#\:\$p>svg>foreignObject>section .contains-task-list:hover .task-list-item-convert-container{clip:auto;display:block;height:24px;overflow:visible;width:auto}div#\:\$p>svg>foreignObject>section ::-webkit-calendar-picker-indicator{filter:invert(50%)}div#\:\$p>svg>foreignObject>section :is(h1,marp-h1){color:var(--h1-color);font-size:1.6em}div#\:\$p>svg>foreignObject>section :is(h1,marp-h1),div#\:\$p>svg>foreignObject>section :is(h2,marp-h2){border-bottom:none}div#\:\$p>svg>foreignObject>section :is(h2,marp-h2){font-size:1.3em}div#\:\$p>svg>foreignObject>section :is(h3,marp-h3){font-size:1.1em}div#\:\$p>svg>foreignObject>section :is(h4,marp-h4){font-size:1.05em}div#\:\$p>svg>foreignObject>section :is(h5,marp-h5){font-size:1em}div#\:\$p>svg>foreignObject>section :is(h6,marp-h6){font-size:.9em}div#\:\$p>svg>foreignObject>section :is(h1,marp-h1) strong,div#\:\$p>svg>foreignObject>section :is(h2,marp-h2) strong,div#\:\$p>svg>foreignObject>section :is(h3,marp-h3) strong,div#\:\$p>svg>foreignObject>section :is(h4,marp-h4) strong,div#\:\$p>svg>foreignObject>section :is(h5,marp-h5) strong,div#\:\$p>svg>foreignObject>section :is(h6,marp-h6) strong{color:var(--heading-strong-color);font-weight:inherit}div#\:\$p>svg>foreignObject>section :is(h1,marp-h1)::part(auto-scaling),div#\:\$p>svg>foreignObject>section :is(h2,marp-h2)::part(auto-scaling),div#\:\$p>svg>foreignObject>section :is(h3,marp-h3)::part(auto-scaling),div#\:\$p>svg>foreignObject>section :is(h4,marp-h4)::part(auto-scaling),div#\:\$p>svg>foreignObject>section :is(h5,marp-h5)::part(auto-scaling),div#\:\$p>svg>foreignObject>section :is(h6,marp-h6)::part(auto-scaling){max-height:563px}div#\:\$p>svg>foreignObject>section hr{height:0;padding-top:.25em}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre){border:1px solid 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:where(.hljs-name),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-quote),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-selector-pseudo),div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-selector-tag){color:var(--color-prettylights-syntax-entity-tag)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-subst){color:var(--color-prettylights-syntax-storage-modifier-import)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-section){color:var(--color-prettylights-syntax-markup-heading);font-weight:700}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-bullet){color:var(--color-prettylights-syntax-markup-list)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-emphasis){color:var(--color-prettylights-syntax-markup-italic);font-style:italic}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-strong){color:var(--color-prettylights-syntax-markup-bold);font-weight:700}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-addition){background-color:var(--color-prettylights-syntax-markup-inserted-bg);color:var(--color-prettylights-syntax-markup-inserted-text)}div#\:\$p>svg>foreignObject>section :is(pre,marp-pre) :where(.hljs-deletion){background-color:var(--color-prettylights-syntax-markup-deleted-bg);color:var(--color-prettylights-syntax-markup-deleted-text)}div#\:\$p>svg>foreignObject>section footer,div#\:\$p>svg>foreignObject>section header{color:var(--header-footer-color);font-size:18px;left:30px;margin:0;position:absolute}div#\:\$p>svg>foreignObject>section header{top:21px}div#\:\$p>svg>foreignObject>section footer{bottom:21px}div#\:\$p>svg>foreignObject>section{--h1-color:#246;--header-footer-color:hsla(0,0%,40%,.75);--heading-strong-color:#48c;--paginate-color:#777;align-items:stretch;display:flex;flex-flow:column nowrap;font-size:29px;height:720px;justify-content:center;padding:78.5px;width:1280px}div#\:\$p>svg>foreignObject>section{--marpit-root-font-size:29px}div#\:\$p>svg>foreignObject>section:where(.invert){--h1-color:#cee7ff;--header-footer-color:hsla(0,0%,60%,.75);--heading-strong-color:#7bf;--paginate-color:#999}div#\:\$p>svg>foreignObject>section>:last-child,div#\:\$p>svg>foreignObject>section[data-footer]>:nth-last-child(2){margin-bottom:0}div#\:\$p>svg>foreignObject>section>:first-child,div#\:\$p>svg>foreignObject>section>header:first-child+*{margin-top:0}div#\:\$p>svg>foreignObject>section:after{bottom:21px;color:var(--paginate-color);font-size:24px;padding:0;position:absolute;right:30px}div#\:\$p>svg>foreignObject>section:after{--marpit-root-font-size:24px}div#\:\$p>svg>foreignObject>section[data-color] :is(h1,marp-h1),div#\:\$p>svg>foreignObject>section[data-color] :is(h2,marp-h2),div#\:\$p>svg>foreignObject>section[data-color] :is(h3,marp-h3),div#\:\$p>svg>foreignObject>section[data-color] :is(h4,marp-h4),div#\:\$p>svg>foreignObject>section[data-color] :is(h5,marp-h5),div#\:\$p>svg>foreignObject>section[data-color] :is(h6,marp-h6){color:currentcolor}div#\:\$p>svg>foreignObject>section img[data-marp-twemoji]{background:transparent;height:1em;margin:0 .05em 0 .1em;vertical-align:-.1em;width:1em}
/* @theme owen */
/* Styles for slides only, they don't work on github.com */
/* PROJECT-SPECIFIC
***********************************************************/div#\:\$p>svg>foreignObject>section :is(h1,marp-h1){color:#333}
/* TEXT
***********************************************************/div#\:\$p>svg>foreignObject>section .caption{color:#888;margin-top:0!important;margin-bottom:16px!important}div#\:\$p>svg>foreignObject>section .slides-small{font-size:calc(var(--marpit-root-font-size, 1rem) * .65)!important;line-height:calc(var(--marpit-root-font-size, 1rem) * .9)!important;margin-top:0!important;margin-bottom:16px!important}div#\:\$p>svg>foreignObject>section section.slides-small{--marpit-root-font-size:calc(var(--marpit-root-font-size, 1rem) * .65)!important}div#\:\$p>svg>foreignObject>section{background-color:#fff;color:#333}
/* LAYOUT
***********************************************************/div#\:\$p>svg>foreignObject>section .block{display:block}
/* Create two col layout */div#\:\$p>svg>foreignObject>section .twocolumn{display:grid;grid-template-columns:1fr 1fr;grid-gap:20px;text-align:left}
/* ICONS + TEXT ADDITIONS
***********************************************************/
/* Adds "Page" prefix and total page number. Local pagination directive still required */div#\:\$p>svg>foreignObject>section:after{font-size:calc(var(--marpit-root-font-size, 1rem) * .9)!important;content:attr(data-marpit-pagination) ' / 'attr(data-marpit-pagination-total)}div#\:\$p>svg>foreignObject>section:after{--marpit-root-font-size:calc(var(--marpit-root-font-size, 1rem) * .9)!important}div#\:\$p>svg>foreignObject>section .back-icon{margin-top:20px}
/* adds an external link icon after a.target=_blank */div#\:\$p>svg>foreignObject>section a[target=_blank]:after{content:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAQElEQVR42qXKwQkAIAxDUUdxtO6/RBQkQZvSi8I/pL4BoGw/XPkh4XigPmsUgh0626AjRsgxHTkUThsG2T/sIlzdTsp52kSS1wAAAABJRU5ErkJggg==);margin:0 3px 0 5px}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]{columns:initial!important;display:block!important;padding:0!important}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]:after,div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]:before,div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=content]:after,div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=content]:before{display:none!important}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]>div[data-marpit-advanced-background-container]{all:initial;display:flex;flex-direction:row;height:100%;overflow:hidden;width:100%}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]>div[data-marpit-advanced-background-container][data-marpit-advanced-background-direction=vertical]{flex-direction:column}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background][data-marpit-advanced-background-split]>div[data-marpit-advanced-background-container]{width:var(--marpit-advanced-background-split,50%)}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background][data-marpit-advanced-background-split=right]>div[data-marpit-advanced-background-container]{margin-left:calc(100% - var(--marpit-advanced-background-split, 50%))}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=background]>div[data-marpit-advanced-background-container]>figure{all:initial;background-position:center;background-repeat:no-repeat;background-size:cover;flex:auto;margin:0}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=content],div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=pseudo]{background:transparent!important}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background=pseudo],div#\:\$p>svg[data-marpit-svg]>foreignObject[data-marpit-advanced-background=pseudo]{pointer-events:none!important}div#\:\$p>svg>foreignObject>section[data-marpit-advanced-background-split]{width:100%;height:100%}</style></head><body><div class="bespoke-progress-parent"><div class="bespoke-progress-bar"></div></div><div class="bespoke-marp-osc"><button data-bespoke-marp-osc="prev" tabindex="-1" title="Previous slide">Previous slide</button><span data-bespoke-marp-osc="page"></span><button data-bespoke-marp-osc="next" tabindex="-1" title="Next slide">Next slide</button><button data-bespoke-marp-osc="fullscreen" tabindex="-1" title="Toggle fullscreen (f)">Toggle fullscreen</button><button data-bespoke-marp-osc="presenter" tabindex="-1" title="Open presenter view (p)">Open presenter view</button></div><div id=":$p"><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="1" data-paginate="true" data-theme="owen" data-marpit-pagination="1" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h1 id="img-width4-srcextensionexplode-tutorial-finalassetsimgexplosion-iconsvg-3-dom"><img width="4%" src="../../extension/explode-tutorial-final/assets/img/explosion-icon.svg" /> 3-DOM</h1>
<p><span class="slides-small"><a href="../slides/3-dom.html">slides</a> | <span class="slides-small"><a href="../markdown/3-dom">markdown</a> | <a href="../www/3-dom.html">HTML</a></span></p>
<p><span class="slides-small"><a href="../../README.md">⌂</a> | <a href="0-introduction.html">0-Introduction</a> | <a href="1-hello-world.html">1-Hello World!</a> | <a href="2-architecture.html">2-Architecture</a> | <a href="3-dom.html">3-DOM</a> | <a href="4-explosion.html">4-Explosion</a> | <a href="5-examples.html">5-Examples</a></span></p>
<ol>
<li>Download and add project assets</li>
<li>Add a browser action and icons</li>
<li>Test the explosion script</li>
</ol>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="2" data-paginate="true" data-theme="owen" data-marpit-pagination="2" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="%F0%9F%91%89-get-project-assets"><img class="emoji" draggable="false" alt="👉" src="https://cdn.jsdelivr.net/gh/jdecked/[email protected]/assets/svg/1f449.svg" data-marp-twemoji=""/> Get project assets</h2>
<div class="twocolumn">
<div class="col">
<ol>
<li>Download the <a target="_blank" href="https://github.com/sneakaway-studio/explode-the-web/tree/main/extension"><code>assets.zip</code></a> file you'll need to continue the tutorial.</li>
<li>Unzip the folder and place it in your <code>explode-tutorial</code> project folder.</li>
<li>Your structure should look like this ></li>
</ol>
</div>
<div class="col">
<pre is="marp-pre" data-auto-scaling="downscale-only"><code>/explode-tutorial/
assets/
css/
img/
libs/
js/
pages/
sounds/
background.js
content.js
manifest.json
</code></pre>
</div>
</div>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="3" data-paginate="true" data-theme="owen" data-marpit-pagination="3" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="browser-action">Browser action</h2>
<div class="twocolumn">
<div class="col">
<ul>
<li>An <a target="_blank" href="https://developer.chrome.com/docs/extensions/reference/action/">action</a> adds an extension icon and popup window to the browser toolbar.</li>
<li>The action is sometimes called "browser action", or "popup script".</li>
<li>The action popup is an HTML page you define and has its own context (and its own DevTools console!).</li>
</ul>
</div>
<div class="col">
<img width="700" src="../figures/tutorial-2022/2-1-diagram-architecture.svg" />
</div>
</div>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="4" data-paginate="true" data-theme="owen" data-marpit-pagination="4" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="%F0%9F%91%89-add-an-action"><img class="emoji" draggable="false" alt="👉" src="https://cdn.jsdelivr.net/gh/jdecked/[email protected]/assets/svg/1f449.svg" data-marp-twemoji=""/> Add an action</h2>
<div class="twocolumn">
<div class="col">
<ol>
<li>Add a new file to the project folder called <code>action.html</code></li>
<li>Paste in this code.</li>
</ol>
</div>
<div class="col">
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-html"><span class="hljs-meta"><!DOCTYPE <span class="hljs-keyword">html</span>></span>
<span class="hljs-tag"><<span class="hljs-name">html</span>></span>
<span class="hljs-tag"><<span class="hljs-name">head</span>></span>
<span class="hljs-tag"><<span class="hljs-name">meta</span> <span class="hljs-attr">charset</span>=<span class="hljs-string">"UTF-8"</span>></span>
<span class="hljs-tag"></<span class="hljs-name">head</span>></span>
<span class="hljs-tag"><<span class="hljs-name">body</span>></span>
<span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"width:220px; text-align:center"</span>></span>
<span class="hljs-tag"><<span class="hljs-name">p</span>></span><img class="emoji" draggable="false" alt="💥" src="https://cdn.jsdelivr.net/gh/jdecked/[email protected]/assets/svg/1f4a5.svg" data-marp-twemoji=""/> Explode Tracked Pages!<span class="hljs-tag"></<span class="hljs-name">p</span>></span>
<span class="hljs-tag"><<span class="hljs-name">p</span>></span>Press e + ~ to test<span class="hljs-tag"></<span class="hljs-name">p</span>></span>
<span class="hljs-tag"></<span class="hljs-name">div</span>></span>
<span class="hljs-tag"></<span class="hljs-name">body</span>></span>
<span class="hljs-tag"></<span class="hljs-name">html</span>></span>
</code></pre>
</div>
</div>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="5" data-paginate="true" data-theme="owen" data-marpit-pagination="5" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="%F0%9F%91%89-add-the-action-and-icons-to-the-manifest"><img class="emoji" draggable="false" alt="👉" src="https://cdn.jsdelivr.net/gh/jdecked/[email protected]/assets/svg/1f449.svg" data-marp-twemoji=""/> Add the action and icons to the manifest</h2>
<div class="twocolumn">
<div class="col">
<p>The icon identifies the browser extension in the <code>chrome://extensions</code> page.</p>
<ol>
<li>Add this code to your manifest to add the icon and action.</li>
<li>Refresh the extension.</li>
</ol>
</div>
<div class="col">
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-json"><span class="hljs-attr">"icons"</span><span class="hljs-punctuation">:</span> <span class="hljs-punctuation">{</span>
<span class="hljs-attr">"16"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"assets/img/explosion-icon16.png"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"32"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"assets/img/explosion-icon32.png"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"64"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"assets/img/explosion-icon64.png"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"128"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"assets/img/explosion-icon128.png"</span>
<span class="hljs-punctuation">}</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"action"</span><span class="hljs-punctuation">:</span> <span class="hljs-punctuation">{</span>
<span class="hljs-attr">"default_icon"</span><span class="hljs-punctuation">:</span> <span class="hljs-punctuation">{</span>
<span class="hljs-attr">"16"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"assets/img/explosion-icon16.png"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"32"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"assets/img/explosion-icon32.png"</span>
<span class="hljs-punctuation">}</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"default_title"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"Explode Tracked Web Pages!"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"default_popup"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"action.html"</span>
<span class="hljs-punctuation">}</span><span class="hljs-punctuation">,</span>
</code></pre>
</div>
</div>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="6" data-paginate="true" data-theme="owen" data-marpit-pagination="6" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="%F0%9F%91%89-add-libraries-to-manifest"><img class="emoji" draggable="false" alt="👉" src="https://cdn.jsdelivr.net/gh/jdecked/[email protected]/assets/svg/1f449.svg" data-marp-twemoji=""/> Add libraries to manifest</h2>
<div class="twocolumn">
<div class="col">
<p>Let's go ahead and reference the libraries we need in our manifest.</p>
<ol>
<li>Edit the <code>content_script</code> section, and add <code>web_accessible_resources</code> to the end. See <a target="_blank" href="https://developer.chrome.com/docs/extensions/reference/">documentation</a> for details.</li>
<li>If you prefer to copy and paste you can get the full <a target="_blank" href="https://github.com/sneakaway-studio/explode-the-web/blob/main/extension/explode-tutorial-3/manifest.json"><code>manifest.json</code></a> on Github.</li>
</ol>
</div>
<div class="col">
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-json"><span class="hljs-attr">"content_scripts"</span><span class="hljs-punctuation">:</span> <span class="hljs-punctuation">[</span><span class="hljs-punctuation">{</span>
<span class="hljs-attr">"matches"</span><span class="hljs-punctuation">:</span> <span class="hljs-punctuation">[</span><span class="hljs-string">"<all_urls>"</span><span class="hljs-punctuation">]</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"js"</span><span class="hljs-punctuation">:</span> <span class="hljs-punctuation">[</span>
<span class="hljs-string">"assets/libs/anime.min-3.2.0.js"</span><span class="hljs-punctuation">,</span>
<span class="hljs-string">"assets/libs/jquery-3.6.0.min.js"</span><span class="hljs-punctuation">,</span>
<span class="hljs-string">"assets/libs/purify-2.3.4.js"</span><span class="hljs-punctuation">,</span>
<span class="hljs-string">"assets/js/disconnect-tracking-services.js"</span><span class="hljs-punctuation">,</span>
<span class="hljs-string">"assets/js/functions.js"</span><span class="hljs-punctuation">,</span>
<span class="hljs-string">"assets/js/keys.js"</span><span class="hljs-punctuation">,</span>
<span class="hljs-string">"assets/js/explode.js"</span><span class="hljs-punctuation">,</span>
<span class="hljs-string">"content.js"</span>
<span class="hljs-punctuation">]</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"css"</span><span class="hljs-punctuation">:</span> <span class="hljs-punctuation">[</span>
<span class="hljs-string">"assets/css/styles.css"</span>
<span class="hljs-punctuation">]</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"run_at"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"document_end"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"all_frames"</span><span class="hljs-punctuation">:</span> <span class="hljs-literal"><span class="hljs-keyword">true</span></span>
<span class="hljs-punctuation">}</span><span class="hljs-punctuation">]</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"web_accessible_resources"</span><span class="hljs-punctuation">:</span> <span class="hljs-punctuation">[</span><span class="hljs-punctuation">{</span>
<span class="hljs-attr">"resources"</span><span class="hljs-punctuation">:</span> <span class="hljs-punctuation">[</span><span class="hljs-string">"*.svg"</span><span class="hljs-punctuation">,</span> <span class="hljs-string">"*.mp3"</span><span class="hljs-punctuation">]</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"matches"</span><span class="hljs-punctuation">:</span> <span class="hljs-punctuation">[</span><span class="hljs-string">"<all_urls>"</span><span class="hljs-punctuation">]</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"use_dynamic_url"</span><span class="hljs-punctuation">:</span> <span class="hljs-literal"><span class="hljs-keyword">true</span></span>
<span class="hljs-punctuation">}</span><span class="hljs-punctuation">]</span>
</code></pre>
</div>
</div>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="7" data-paginate="true" data-theme="owen" data-marpit-pagination="7" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="%F0%9F%91%89-test-the-explosion"><img class="emoji" draggable="false" alt="👉" src="https://cdn.jsdelivr.net/gh/jdecked/[email protected]/assets/svg/1f449.svg" data-marp-twemoji=""/> Test the explosion</h2>
<img width="400" src="../figures/tutorial-2022/3-2-browser-action.png" />
<ul>
<li>Refresh your extension and click the action icon to see the popup (you may need to click the puzzle piece see or pin it).</li>
<li>If everything worked you'll see a line that says <code>Press e + ~ to test</code>.</li>
<li>Before you test, know that you can reset the page by clicking reload.</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="8" data-paginate="true" data-theme="owen" data-marpit-pagination="8" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="explode-the-web">Explode the Web!</h2>
<p>I don't know about you but I enjoy this small function immensely.</p>
<p><img width="400" src="../figures/tutorial-2022/3-3-exploded-nytimes.png" /> <img width="400" src="../figures/tutorial-2022/3-3-exploded-cnn.png" /></p>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="9" data-paginate="true" data-theme="owen" data-marpit-pagination="9" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="explode-the-web-1">Explode the Web!</h2>
<p>The code that makes this work is just Javascript. I'll say two things about it:</p>
<ul>
<li>The animation is made possible thanks to <a target="_blank" href="https://animejs.com/">Anime.js</a> library. I highly recommend exploring the examples in the documentation.</li>
<li>I wrote the <a target="_blank" href="https://github.com/sneakaway-studio/explode-the-web/blob/main/extension/explode-tutorial-final/assets/js/explode.js">code</a> that explodes the page. It is open source, and is fairly simple: grabbing all the html elements on a page, and transforming their position, rotation, and scale using random numbers.</li>
</ul>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="10" data-paginate="true" data-theme="owen" data-marpit-pagination="10" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="%F0%9F%91%89-the-document-object-model"><img class="emoji" draggable="false" alt="👉" src="https://cdn.jsdelivr.net/gh/jdecked/[email protected]/assets/svg/1f449.svg" data-marp-twemoji=""/> The document object model</h2>
<p>With our extension assets ready we can start to build the tracker-tracking function!</p>
<ol>
<li>Add this code to <code>content.js</code></li>
<li>Save the file and refresh the extension</li>
<li>Open the test page in Chrome <a href="%60../../extension/extension-tutorial-final/pages/test.html%60"><code>assets/pages/test.html</code></a> and open the console.</li>
</ol>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-js">$(<span class="hljs-variable language_">document</span>).<span class="hljs-title function_">ready</span>(<span class="hljs-function">() =></span> {
<span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(<span class="hljs-string">`<img class="emoji" draggable="false" alt="💥" src="https://cdn.jsdelivr.net/gh/jdecked/[email protected]/assets/svg/1f4a5.svg" data-marp-twemoji=""/> The page title is <span class="hljs-subst">${<span class="hljs-variable language_">document</span>.title}</span>`</span>);
});
</code></pre>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="11" data-paginate="true" data-theme="owen" data-marpit-pagination="11" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="the-document-object-model">The document object model</h2>
<div class="twocolumn">
<div class="col">
<ul>
<li>The code you added will let you see the title of any page in the console.</li>
<li>This is possible because browsers load the text of web pages as nested elements, or "nodes".</li>
<li>This "document object model" or DOM allows us to get (or set!) the attributes of any element via its path in the hierarchy.</li>
</ul>
</div>
<div class="col">
<img width="600" src="../figures/tutorial-2022/3-4-dom.svg" />
</div>
</div>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="12" data-paginate="true" data-theme="owen" data-marpit-pagination="12" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="%F0%9F%91%89-change-the-dom-in-the-console"><img class="emoji" draggable="false" alt="👉" src="https://cdn.jsdelivr.net/gh/jdecked/[email protected]/assets/svg/1f449.svg" data-marp-twemoji=""/> Change the DOM in the console</h2>
<div class="twocolumn">
<div class="col">
<p>The console is interactive, so you can even test this on a live page.</p>
<ol>
<li>Paste this into the console</li>
<li>Press return</li>
<li>Try <a target="_blank" href="https://www.w3schools.com/tags/ref_colornames.asp">other color names</a></li>
</ol>
</div>
<div class="col">
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-js"><span class="hljs-variable language_">document</span>.<span class="hljs-property">body</span>.<span class="hljs-property">style</span>.<span class="hljs-property">backgroundColor</span> = <span class="hljs-string">"red"</span>;
</code></pre>
</div>
</div>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="13" data-paginate="true" data-theme="owen" data-marpit-pagination="13" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="%F0%9F%91%89-get-script-elements-using-the-dom"><img class="emoji" draggable="false" alt="👉" src="https://cdn.jsdelivr.net/gh/jdecked/[email protected]/assets/svg/1f449.svg" data-marp-twemoji=""/> Get script elements using the DOM</h2>
<ol>
<li>Add this code to <code>content.js</code> just under the <code>console.log</code> function and before the closing <code>});</code> to store a reference to all the script elements on each page.</li>
<li>Refresh the extension, reload the test page, and you should see all script elements appear in the console as an <code>HTMLCollection</code>.</li>
</ol>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-js"><span class="hljs-keyword">var</span> scriptsFoundArr = <span class="hljs-variable language_">document</span>.<span class="hljs-title function_">getElementsByTagName</span>(<span class="hljs-string">"script"</span>);
<span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(scriptsFoundArr);
</code></pre>
</section>
</foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="14" data-paginate="true" data-theme="owen" data-marpit-pagination="14" data-marpit-pagination-total="14" style="--paginate:true;--theme:owen;">
<h2 id="part-3-conclusion">Part 3 conclusion</h2>
<ul>
<li>We made a lot of progress in this section, adding assets with icons and a test page, hooking up the explode test function, and using the DOM to get scripts.</li>
<li>In the next section we'll look at these elements and check if they are connecting to tracker domains.</li>
<li><img class="emoji" draggable="false" alt="👉" src="https://cdn.jsdelivr.net/gh/jdecked/[email protected]/assets/svg/1f449.svg" data-marp-twemoji=""/> Start the next section <a href="4-explosion.html">Create the Explosion</a></li>
</ul>
</section>
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