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‎README.md

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Client-side tool to automatically generate a table of contents for your Markdown document. Simply paste it and a ToC will instantaneously be generated.
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Check it online [here](//luciopaiva.com/markdown-toc).
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Original author [here](//luciopaiva.com/markdown-toc).
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# Modifications
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- External imports made local [Google Analytics](https://www.google-analytics.com/analytics.js), located /assets/js/analytics.js.
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- CSS moved from index.html into style.css with a reference to the styling file.
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- Added favicon to index.html

‎assets/css/style.css

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:root{
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/* Custom Scrollbar - WebKit */
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--scrollbarWidthSlim: 6px;
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--scrollbarBgColourGradient: linear-gradient(180deg, #d0368a 0%, #708ad4 99%);
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}
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body {
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padding: 0;
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margin: 0;
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font-family: sans-serif;
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background-color: #3b3b3b;
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color: white;
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}
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a, a:hover, a:active, a:visited {
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color: #8cd4a8;
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text-decoration: none;
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margin: 0 5px;
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}
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.container {
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display: grid;
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grid-template-columns: 50% 50%;
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grid-template-rows: 50px 50px auto 10px;
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grid-gap: 10px;
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padding: 10px;
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width: calc(100vw - 3 * 10px);
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height: calc(100vh - 2 * 10px);
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}
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.header {
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display: flex;
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justify-content: center;
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align-items: flex-end;
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font-size: 22px;
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}
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.area {
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resize: none;
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background-color: #5b5b5b;
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color: #c8c8c8;
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border: 1px solid #4e4e4e;
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padding: 10px;
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font-size: 10px;
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font-family: monospace;
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}
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#title {
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grid-column: 1 / 3;
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justify-content: flex-start;
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align-items: center;
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font-size: 32px;
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text-align: center;
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}
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#input-header {
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grid-column: 1 / 2;
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grid-row: 2 / 3;
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}
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.output-box {
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grid-column: 2 / 3;
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grid-row: 3 / 4;
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display: flex;
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flex-direction: column;
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}
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.output-level-bar {
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display: flex;
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flex-direction: row;
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border: 1px solid #666;
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border-radius: 5px;
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padding: 10px;
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margin-bottom: 10px;
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}
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.output-level-bar > * {
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margin-right: 4px;
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}
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.form-component {
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box-shadow: inset 0 1px 3px 0 #91b8b3;
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border: 1px solid #566963;
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border-radius: 5px;
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display: inline-block;
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font-size: 15px;
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font-weight: bold;
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padding: 4px 20px;
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}
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#levels-to-show {
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padding: 0 10px;
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width: 30px;
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}
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.button {
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background-color: #768d87;
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cursor: pointer;
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color: #ffffff;
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text-decoration: none;
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text-shadow: 0 -1px 0 #2b665e;
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}
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.button:hover {
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background-color: #6c7c7c;
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}
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.button:active {
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position: relative;
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top: 1px;
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}
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.label {
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display: flex;
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align-items: center;
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margin-right: 8px;
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}
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#output-header {
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grid-column: 2 / 3;
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grid-row: 2 / 3;
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}
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#input-area {
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grid-column: 1 / 2;
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grid-row: 3 / 4;
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}
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#output-area {
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height: 100%;
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}
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.footer {
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grid-column: 1 / 3;
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grid-row: 4 / 5;
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/* display: flex;
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justify-content: flex-end;
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align-items: center; */
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font-size: 11px;
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}
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.footer #modified
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{
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float: left;
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width: 33%;
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text-align: left;
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}
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.footer #center
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{
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float: center;
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width: 34%;
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text-align: center;
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}
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.footer #original
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{
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float: right;
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width: 33%;
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text-align: right;
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}

‎assets/images/favicon/android-chrome-192x192.png

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‎assets/images/favicon/android-chrome-512x512.png

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‎assets/images/favicon/apple-touch-icon.png

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‎assets/images/favicon/favicon-16x16.png

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‎assets/images/favicon/favicon-32x32.png

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‎assets/images/favicon/favicon.ico

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‎assets/js/analytics.js

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‎assets/js/index.js

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class MarkdownToc {
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constructor () {
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this.inputArea = document.getElementById("input-area");
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this.outputArea = document.getElementById("output-area");
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this.levelUpButton = document.getElementById("level-up");
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this.levelUpButton.addEventListener("click", this.changeLevel.bind(this, +1));
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this.levelDownButton = document.getElementById("level-down");
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this.levelDownButton.addEventListener("click", this.changeLevel.bind(this, -1));
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this.levelsToShowElement = document.getElementById("levels-to-show");
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this.levelsToShow = 2;
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this.inputArea.addEventListener("input", this.process.bind(this));
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this.process();
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}
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changeLevel(delta) {
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this.levelsToShow += delta;
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if (this.levelsToShow < 1) {
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this.levelsToShow = 1;
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} else if (this.levelsToShow > 10) {
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this.levelsToShow = 10;
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} else if (typeof this.levelsToShow !== "number") {
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this.levelsToShow = 2;
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}
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this.levelsToShowElement.setAttribute("value", this.levelsToShow);
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this.process();
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}
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process() {
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const input = this.inputArea.value;
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const menus = ["# Table of Contents", ""];
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let isCodeBlock = false;
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let topLevel = NaN;
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let previous = null;
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for (let line of input.split("\n")) {
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const trimmed = line.trim();
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if (trimmed.startsWith("```")) {
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isCodeBlock = !isCodeBlock;
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}
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if (isCodeBlock) {
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continue;
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}
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let level = NaN;
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let title = null;
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// Check for:
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// 1. ATX-style headers: ## My Header
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//
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// 2. Setext-style headers:
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// a) Level 1 header: My Header
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// =========
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//
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// b) Level 2 header: My Header
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// ---------
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//
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// Edge cases that do not count as headers:
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// i) Horizontal rule ("Underline" preceded by empty line):
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//
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// Some paragraph 1
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// <empty line>
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// -----
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// Some paragraph 2
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//
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// ii) Two or more horizontal rules:
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//
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// Some paragraph 1
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//
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// -----
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// -----
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// -----
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// Some paragraph 2
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if (trimmed.startsWith("#")) {
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const match = trimmed.match(/(#+)\s*(.*?)#*\s*$/);
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level = match[1].length;
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title = match[2].trim();
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} else if (previous != null && previous.length > 0 && trimmed.length > 0) {
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if (trimmed.match(/[^=]/g) == null) {
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level = 1;
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title = previous;
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} else if (trimmed.match(/[^-]/g) == null && previous.match(/[^-]/g) != null) {
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level = 2;
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title = previous;
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}
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}
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if (!isNaN(level) && title != null) {
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if (isNaN(topLevel)) {
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topLevel = level;
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}
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if (level - topLevel >= this.levelsToShow) {
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continue;
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}
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const link = title.toLocaleLowerCase()
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.replace(/\s/g, "-")
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.replace(/[^A-Za-z0-9-_]/g, "");
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const menu = `${" ".repeat(level - topLevel)}- [${title}](#${link})`;
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menus.push(menu);
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previous = null;
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} else {
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previous = trimmed;
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}
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}
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this.outputArea.value = menus.join("\n");
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}
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}

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