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Merge pull request #140 from estelle/multicol
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CSS column layout module example
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@dipikabh
dipikabh committed Jun 6, 2023
2 parents bf39396 + 1ea705e commit becd34a
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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>
</html>

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