alexzhangmaker.github.io/multicol.html at main · alexzhangmaker/alexzhangmaker.github.io · GitHub

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<!doctype html>
<html lang="en-us">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width" />
    <title>CSS column layout example</title>
    <style>
      article {
        column-count: 10;
        column-width: 10em;
        widows: 3;
        orphans: 3;
        gap: 1em;
        column-rule: 2px dashed #666;
        height: 40em;
      }
      .title {
        column-span: all;
        display: flex;
        align-items: baseline;
        gap: 1em;
        flex-wrap: wrap;
      }
      p {
        margin: 0 0 1em 0;
        line-height: 1.4;
      }
      .breakInside * {
        break-inside: avoid;
      }
      #options {
        position: fixed;
        top: 1rem;
        right: 1rem;
        background: white;
        display: none;
      }
      fieldset p {
        margin-bottom: 0.25em;
      }
      [aria-expanded] {
        position: relative;
        top: 0;
        transition: 200ms;
      }
      [aria-expanded="false"] {
        top: 0.75em;
      }
      [aria-expanded="false"] + #controls {
        display: none;
      }
      legend {
        background-color: #dedede;
        padding: 0.5em;
      }
      [aria-expanded="false"] {
        margin: -1em;
        display: inline-block;
      }
      blockquote {
        border: 2px dashed red;
        margin: 0 0 0.25em 0;
      }
      blockquote p {
        margin-bottom: 0;
      }
      blockquote p::before,
      blockquote p::after {
        content: '"';
        font-size: 1.2em;
        vertical-align: baseline;
        color: red;
      }
    </style>
  </head>
  <body>
    <article>
      <div class="title">
        <h1>A Lament for Confederation</h1>
        <p>&mdash;Chief Dan George, 1967</p>
      </div>

      <p>
        How long have I known you, Oh Canada? A hundred years? Yes, a hundred
        years. And many, many tides more. And today, when you celebrate your
        hundred years, Oh Canada, I am sad for all the Indian people throughout
        the land.
      </p>

      <p>
        For I have known you when your forests were mine; when they gave me my
        meat and my clothing. I have known you in your fruits and rivers where
        your fish flashed and danced in the sun, where the waters said ‘come and
        eat of my abundance.’ I have known you in the freedom of your winds. And
        my spirit, like your winds, once roamed this good lands.
      </p>

      <blockquote>
        <p>
          But in long the hundred years since the white man came, I have seen
          that freedom disappear just like the salmon going mysteriously out to
          sea.
        </p>
      </blockquote>

      <p>
        The white man’s strange customs I could not understand, pressed down
        upon me until I could no longer breathe.
      </p>

      <p>
        When I fought to protect my home and my land, I was called a savage.
        When I neither understood nor welcomed this new way of life, I was
        called lazy. When I tried to rule my people, I was stripped of my
        authority.
      </p>

      <p>
        My nation was ignored in your history textbooks – we were less important
        in the history of Canada than the buffalo that ranged the plains. I was
        ridiculed in your plays and motion pictures, and when I drank your
        fire-water, I got drunk – very, very drunk. And I forgot.
      </p>

      <p>
        Oh Canada, how can I celebrate with you this centenary, this hundred
        years? Shall I thank you for the reserves that are left me of my
        beautiful forests? Shall I thank you for the canned fish of my rivers?
        Shall I thank you for the loss of my pride and authority, even among my
        own people? For the lack of my will to fight back? No! I must forget
        what is past and gone.
      </p>

      <p>
        Oh God in heaven! Give me the courage of the olden chiefs. Let me
        wrestle with my surroundings. Let me once again, as in the days of old,
        dominate my environment. Let me humbly accept this new culture and
        through it rise up and go on.
      </p>

      <p>
        Oh god, like the thunderbird of old, I shall rise again out of the sea.
        I shall grab the instruments of the white man’s success – his education,
        his skills, and with these new tools I shall build my race into the
        proudest segment of your society. And, before I follow the great chiefs
        who have gone before us, I shall see these things come to pass.
      </p>

      <p>
        I shall see our young braves and our chiefs sitting in the house of law
        and government, ruling and being ruled by the knowledge and freedoms of
        our great land. So shall we shatter the barriers of our isolation. So
        shall the next hundred years be the greatest in the proud history of our
        tribes and nations.
      </p>
    </article>
    <fieldset id="options">
      <legend role="button" aria-expanded="true" aria-controls="controls">
        Column options
      </legend>
      <div id="controls">
        <p>
          <input type="range" min="0" max="10" value="10" id="colCount" />
          <label for="colCount">Max # of columns:</label>
        </p>
        <p>
          <input
            type="range"
            min="2"
            max="40"
            value="10"
            step="2"
            id="colWidth" />
          <label for="colWidth">Min width of columns:</label>
        </p>
        <p>
          <input
            type="range"
            min="0"
            max="10"
            value="1"
            step="0.5"
            id="gapSize" />
          <label for="gapSize">Gap size:</label>
        </p>
        <p>
          <input type="checkbox" checked id="colSpan" />
          <label for="colSpan">Byline spans all columns</label>
        </p>
        <p>
          <input type="checkbox" id="blockSpan" />
          <label for="blockSpan">Blockquote spans all columns</label>
        </p>
        <p>
          <input type="checkbox" id="colFill" />
          <label for="colFill">Balance columns</label>
        </p>
        <p>
          <input type="checkbox" id="break" />
          <label for="break">Don't break paragraphs</label>
        </p>
      </div>
    </fieldset>
  </body>
  <script>
    const article = document.querySelector("article");
    const title = document.querySelector(".title");
    const options = document.querySelector("#options");
    const legend = document.querySelector("#options > legend");
    const blockquote = document.getElementsByTagName("blockquote")[0];

    const colCount = document.getElementById("colCount");
    const colWidth = document.getElementById("colWidth");
    const gapSize = document.getElementById("gapSize");
    const colSpan = document.getElementById("colSpan");
    const blockSpan = document.getElementById("blockSpan");
    const colFill = document.getElementById("colFill");
    const breakP = document.getElementById("break");

    // make options visible if js is enabled
    options.style.display = "revert";

    legend.addEventListener("click", () => {
      showAndHideMenu();
    });

    colCount.addEventListener("change", () => {
      article.style.columnCount = colCount.value;
    });

    colWidth.addEventListener("change", () => {
      article.style.columnWidth = `${colWidth.value}em`;
    });

    gapSize.addEventListener("change", () => {
      article.style.gap = `${gapSize.value}em`;
    });

    colSpan.addEventListener("change", () => {
      setColSpan(colSpan, title);
    });

    blockSpan.addEventListener("change", () => {
      setColSpan(blockSpan, blockquote);
    });

    colFill.addEventListener("change", () => {
      if (colFill.checked) {
        article.style.columnFill = "balance";
      } else {
        article.style.columnFill = "auto";
      }
    });

    breakP.addEventListener("change", () => {
      if (breakP.checked) {
        article.classList.add("breakInside");
      } else {
        article.classList.remove("breakInside");
      }
    });

    function showAndHideMenu() {
      if (legend.getAttribute("aria-expanded") === "true") {
        // close it
        legend.setAttribute("aria-expanded", "false");
      } else {
        // open it
        legend.setAttribute("aria-expanded", "true");
      }
    }

    function setColSpan(control, element) {
      if (control.checked) {
        element.style.columnSpan = "all";
      } else {
        element.style.columnSpan = "none";
      }
    }
  </script>

  <script>
    //refer     https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_multicol_layout
    //          https://hackmd.io/@ezetThankGOD/H1rjo76ij
    //          https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_multicol_layout/Basic_concepts
  </script>
</html>