a11-issues.css/a11ty-issues.css at main · InteractionDesignFoundation/a11-issues.css · GitHub

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/* Similar projects:
 - https://github.com/SwansonRoss/a11y-style-sheet
 - https://willmendesneto.com/posts/linting-web-accessibility-issues-in-your-html-using-just-css/
 - https://dev.to/devmount/3-css-tricks-to-uncover-accessibility-issues-4fo8
 */
:root {
    --nice-color: deeppink;
    --nice-font: "Comic Sans MS", "Times New Roman", serif;
    --nice-border: 5px dashed deeppink;
}

/* Missing html language attribute */
html:not([lang]),
html[lang=""] {
    border-top: 20px solid var(--nice-color);
}

/* Missing alternative text for images */
img:not([alt], [role="presentation"]) {
    border: var(--nice-border);
}

/* Missing role and aria label for canvas */
canvas:not([role]),
canvas:not([aria-label]),
canvas[role=""],
canvas[aria-label=""] {
    border: var(--nice-border);
}

/* highlight on links without valid href attribute */
a[href="#"],
a[href=""],
a[href*="javascript:void(0)"] {
    outline: var(--nice-border) !important;
}

/* highlight on empty anchors/buttons */
a:empty:not([aria-label],[aria-labelledby]),
button:empty:not([aria-label],[aria-labelledby]) {
    border: var(--nice-border) !important;
}

/* <i> tag should not be used for icons */
i.fa {
    color: var(--nice-color) !important;
    font-family: var(--nice-font) !important;
    font-size: 3em !important;

    &::after {
        content: '⚠️ This code harms application accessibility!';
        display: inline;
    }
}

h1 h1,
h1 ~ h1,
h1 ~ * h1 {
    color: var(--nice-color) !important;
    font-family: var(--nice-font) !important;

    &::after {
        content: '⚠️ Page should have a single <h1>!' !important;
        display: inline;
    }
}

main main,
main ~ main,
main ~ * main {
    border: var(--nice-border);

    &::after {
        content: '⚠️ Page should have a single <main>!' !important;
        display: inline;
    }
}

button div,
button p,
label div,
label p {
    color: var(--nice-color) !important;
    font-family: var(--nice-font) !important;

    &::after {
        content: '⚠️ Invalid element, phrasing content expected!' !important; /* @see https://caninclude.glitch.me/can/include/ */
        display: inline;
    }
}

/* highlights label with invalid for attribute */
label:not([for],:has(input)),
label[for="#"],
label[for=""] {
    border: var(--nice-border) !important;
}

canvas:not([role]),
canvas[role=""],
canvas:not([aria-label],[aria-labelledby]),
canvas[aria-labelledby=""],
canvas[aria-label=""] {
    border: var(--nice-border);
}

p ul,
p dl,
p ol {
    &::after {
        content: '⚠️ Invalid element, phrasing content expected!' !important; /* @see https://caninclude.glitch.me/can/include/ */
        display: inline;
    }
}

h1,
h2,
h3,
h4,
h5,
h6 {
    div, p {
        color: var(--nice-color) !important;
        font-family: var(--nice-font) !important;

        &::after {
            content: '⚠️ Invalid element, phrasing content expected!' !important; /* @see https://caninclude.glitch.me/can/include/ */
            display: inline;
        }
    }
}

/* highlight on all elements that are inside of lists but not a list item <li> and displays them with a var(--nice-color) outline.*/
:is(ul, ol) > *:not(li) {
    outline: var(--nice-border) !important;
}

/* Avoids div buttons from hell. More details in https://www.htmhell.dev/2-div-with-button-role/ */
div[role="button"] {
    color: var(--nice-font);
    text-decoration: blink !important;
}