feat(curriculum): add accessibility-quiz practice project (#43244)
* feat(curriculum): add accessibility-quiz practice project * add parts 002-006 * add parts 7-8, tentative on logo aspect-ratio * add parts 008-013 * add parts 013-016 * add parts 017-026 * add parts 026-027 * add parts 027-029 * add parts 029-044 * add parts 044-067 - all parts done * add tests 001-009 * add tests 010 - 033 * add tests 034 - 039 * update tests 008~033, add tests 040-050 * add all tests * fix some stuff, remove final.md * take reasonable suggestions from Nich, ignore rest Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com> * replace svg link with actual CDN * remove getAttribute in potentially bad places * add method to form * fix silly querySelectors * adjust selectors for 028 * fix selectors, and add color transformations Co-authored-by: Nicholas Carrigan <nhcarrigan@gmail.com> * fix: typos, and make one test lenient Co-authored-by: gikf <60067306+gikf@users.noreply.github.com> Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com> Co-authored-by: gikf <60067306+gikf@users.noreply.github.com>
This commit is contained in:
Shaun Hamilton
GitHub
@@ -0,0 +1,262 @@
|
||||
---
|
||||
id: 614796cb8086be482d60e0ac
|
||||
title: Part 45
|
||||
challengeType: 0
|
||||
dashedName: part-45
|
||||
---
|
||||
|
||||
# --description--
|
||||
|
||||
On the topic of visual accessibility, contrast between elements is a key factor. For example, the contrast between the text and the background of a heading should be at least 4.5:1.
|
||||
|
||||
Change the font color of all the anchor elements within list elements to something with a contrast ratio of at least 7:1.
|
||||
|
||||
# --hints--
|
||||
|
||||
You should use the `li > a` selector.
|
||||
|
||||
```js
|
||||
assert.exists(new __helpers.CSSHelp(document).getStyle('li > a'));
|
||||
```
|
||||
|
||||
You should give the `a` element a `color` property.
|
||||
|
||||
```js
|
||||
assert.notEmpty(new __helpers.CSSHelp(document).getStyle('li > a')?.color);
|
||||
```
|
||||
|
||||
You should give the `color` property a contrast with the background of at least 7:1. _Hint: I would use `#dfdfe2`_
|
||||
|
||||
```js
|
||||
function luminance(r, g, b) {
|
||||
const a = [r, g, b].map((v) => {
|
||||
v /= 255;
|
||||
return v <= 0.03928 ? v / 12.92 : Math.pow( (v + 0.055) / 1.055, 2.4 );
|
||||
});
|
||||
return a[0] * 0.2126 + a[1] * 0.7152 + a[2] * 0.0722;
|
||||
}
|
||||
function contrast(rgb1, rgb2) {
|
||||
const lum1 = luminance(rgb1[0], rgb1[1], rgb1[2]);
|
||||
const lum2 = luminance(rgb2[0], rgb2[1], rgb2[2]);
|
||||
const brightest = Math.max(lum1, lum2);
|
||||
const darkest = Math.min(lum1, lum2);
|
||||
return (brightest + 0.05)
|
||||
/ (darkest + 0.05);
|
||||
}
|
||||
const backgroundColour = [27, 27, 50];
|
||||
|
||||
for (let elem of document.querySelectorAll('li > a')) {
|
||||
const a = getComputedStyle(elem)?.color;
|
||||
const rgbA = a?.match(/(\d+),\s(\d+),\s(\d+)/);
|
||||
const aColour = [rgbA[1], rgbA[2], rgbA[3]];
|
||||
assert.isAtLeast(contrast(backgroundColour, aColour), 7);
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
# --seed--
|
||||
|
||||
## --seed-contents--
|
||||
|
||||
```html
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta charset="UTF-8" />
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
|
||||
<meta name="description" content="freeCodeCamp Accessibility Quiz practice project" />
|
||||
<title>freeCodeCamp: Accessibility Quiz</title>
|
||||
<link rel="stylesheet" href="styles.css" />
|
||||
</head>
|
||||
<body>
|
||||
<header>
|
||||
<img id="logo" src="https://cdn.freecodecamp.org/platform/universal/fcc_primary.svg">
|
||||
<h1>HTML/CSS Quiz</h1>
|
||||
<nav>
|
||||
<ul>
|
||||
<li><a href="#student-info">INFO</a></li>
|
||||
<li><a href="#html-questions">HTML</a></li>
|
||||
<li><a href="#css-questions">CSS</a></li>
|
||||
</ul>
|
||||
</nav>
|
||||
</header>
|
||||
<main>
|
||||
<form method="post" action="https://freecodecamp.org/practice-project/accessibility-quiz">
|
||||
<section role="region" aria-labelledby="student-info">
|
||||
<h2 id="student-info">Student Info</h2>
|
||||
<div class="info">
|
||||
<label for="student-name">Name:</label>
|
||||
<input type="text" name="student-name" id="student-name" />
|
||||
</div>
|
||||
<div class="info">
|
||||
<label for="student-email">Email:</label>
|
||||
<input type="email" name="student-email" id="student-email" />
|
||||
</div>
|
||||
<div class="info">
|
||||
<label for="birth-date">D.O.B.<span class="sr-only">(Date of Birth)</span></label>
|
||||
<input type="date" name="birth-date" id="birth-date" />
|
||||
</div>
|
||||
</section>
|
||||
<section role="region" aria-labelledby="html-questions">
|
||||
<h2 id="html-questions">HTML</h2>
|
||||
<div class="question-block">
|
||||
<p>1</p>
|
||||
<fieldset class="question" name="html-question-one">
|
||||
<legend>
|
||||
The legend element represents a caption for the content of its
|
||||
parent fieldset element
|
||||
</legend>
|
||||
<ul class="answers-list">
|
||||
<li>
|
||||
<label for="q1-a1">
|
||||
<input type="radio" id="q1-a1" name="q1" value="true" />
|
||||
True
|
||||
</label>
|
||||
</li>
|
||||
<li>
|
||||
<label for="q1-a2">
|
||||
<input type="radio" id="q1-a2" name="q1" value="false" />
|
||||
False
|
||||
</label>
|
||||
</li>
|
||||
</ul>
|
||||
</fieldset>
|
||||
</div>
|
||||
<div class="question-block">
|
||||
<p>2</p>
|
||||
<fieldset class="question" name="html-question-two">
|
||||
<legend>
|
||||
A label element nesting an input element is required to have a
|
||||
for attribute with the same value as the input's id
|
||||
</legend>
|
||||
<ul class="answers-list">
|
||||
<li>
|
||||
<label for="q2-a1">
|
||||
<input type="radio" id="q2-a1" name="q2" value="true" />
|
||||
True
|
||||
</label>
|
||||
</li>
|
||||
<li>
|
||||
<label for="q2-a2">
|
||||
<input type="radio" id="q2-a2" name="q2" value="false" />
|
||||
False
|
||||
</label>
|
||||
</li>
|
||||
</ul>
|
||||
</fieldset>
|
||||
</div>
|
||||
</section>
|
||||
<section role="region" aria-labelledby="css-questions">
|
||||
<h2 id="css-questions">CSS</h2>
|
||||
<div class="formrow">
|
||||
<div class="question-block">
|
||||
<label for="customer">Are you a frontend developer?</label>
|
||||
</div>
|
||||
<div class="answer">
|
||||
<select name="customer" id="customer" required>
|
||||
<option value="">Select an option</option>
|
||||
<option value="yes">Yes</option>
|
||||
<option value="no">No</option>
|
||||
</select>
|
||||
</div>
|
||||
<div class="question-block">
|
||||
<label for="css-questions">Do you have any questions:</label>
|
||||
</div>
|
||||
<div class="answer">
|
||||
<textarea id="css-questions" name="css-questions" rows="5" cols="24">
|
||||
Who is flexbox...
|
||||
</textarea>
|
||||
</div>
|
||||
</div>
|
||||
</section>
|
||||
<button type="submit">Submit</button>
|
||||
</form>
|
||||
</main>
|
||||
<footer>
|
||||
<address>
|
||||
<a href="https://freecodecamp.org">freeCodeCamp</a><br />
|
||||
San Francisco<br />
|
||||
California<br />
|
||||
USA
|
||||
</address>
|
||||
</footer>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
```
|
||||
|
||||
```css
|
||||
body {
|
||||
background: #f5f6f7;
|
||||
color: #1b1b32;
|
||||
font-family: Helvetica;
|
||||
margin: 0;
|
||||
}
|
||||
|
||||
header {
|
||||
width: 100%;
|
||||
height: 50px;
|
||||
background-color: #1b1b32;
|
||||
display: flex;
|
||||
}
|
||||
|
||||
#logo {
|
||||
width: max(100px, 18vw);
|
||||
background-color: #0a0a23;
|
||||
aspect-ratio: 35 / 4;
|
||||
padding: 0.4rem;
|
||||
}
|
||||
|
||||
h1 {
|
||||
color: #f1be32;
|
||||
font-size: min(5vw, 1.2em);
|
||||
}
|
||||
|
||||
nav {
|
||||
width: 50%;
|
||||
max-width: 300px;
|
||||
height: 50px;
|
||||
}
|
||||
|
||||
nav > ul {
|
||||
display: flex;
|
||||
justify-content: space-evenly;
|
||||
}
|
||||
|
||||
nav > ul > li {
|
||||
color: #dfdfe2;
|
||||
margin: 0 0.2rem;
|
||||
padding: 0.2rem;
|
||||
display: block;
|
||||
}
|
||||
|
||||
--fcc-editable-region--
|
||||
|
||||
--fcc-editable-region--
|
||||
|
||||
h1,
|
||||
h2 {
|
||||
font-family: Verdana, Tahoma;
|
||||
}
|
||||
|
||||
h2 {
|
||||
border-bottom: 4px solid #dfdfe2;
|
||||
}
|
||||
|
||||
p::before {
|
||||
content: "Question #";
|
||||
}
|
||||
|
||||
.sr-only {
|
||||
position: absolute;
|
||||
width: 1px;
|
||||
height: 1px;
|
||||
padding: 0;
|
||||
margin: -1px;
|
||||
overflow: hidden;
|
||||
clip: rect(0, 0, 0, 0);
|
||||
white-space: nowrap;
|
||||
border: 0;
|
||||
}
|
||||
|
||||
```
|
||||
Reference in New Issue
Block a user