@terrazzo/parser/dist/lint/plugin-core/rules/a11y-min-font-size.js

Parser/validator for the Design Tokens Community Group (DTCG) standard.

import { docsLink } from '../lib/docs.js';
import { cachedLintMatcher } from '../lib/matchers.js';
export const A11Y_MIN_FONT_SIZE = 'a11y/min-font-size';
export const ERROR_TOO_SMALL = 'TOO_SMALL';
const rule = {
    meta: {
        messages: {
            [ERROR_TOO_SMALL]: '{{ id }} font size too small. Expected minimum of {{ min }}',
        },
        docs: {
            description: 'Enforce font sizes are no smaller than the given value.',
            url: docsLink(A11Y_MIN_FONT_SIZE),
        },
    },
    defaultOptions: {},
    create({ tokens, options, report }) {
        if (!options.minSizePx && !options.minSizeRem) {
            throw new Error('Must specify at least one of minSizePx or minSizeRem');
        }
        const shouldIgnore = options.ignore ? cachedLintMatcher.tokenIDMatch(options.ignore) : null;
        for (const t of Object.values(tokens)) {
            if (shouldIgnore?.(t.id)) {
                continue;
            }
            // skip aliases
            if (t.aliasOf) {
                continue;
            }
            if (t.$type === 'typography' && 'fontSize' in t.$value) {
                const fontSize = t.$value.fontSize;
                if ((fontSize.unit === 'px' && options.minSizePx && fontSize.value < options.minSizePx) ||
                    (fontSize.unit === 'rem' && options.minSizeRem && fontSize.value < options.minSizeRem)) {
                    report({
                        messageId: ERROR_TOO_SMALL,
                        data: {
                            id: t.id,
                            min: options.minSizePx ? `${options.minSizePx}px` : `${options.minSizeRem}rem`,
                        },
                    });
                }
            }
        }
    },
};
export default rule;
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