eslint-plugin-vuoto/dist/rules/zero-width.js

ESLint plugin for detecting and fixing whitespace issues - zero-width characters, non-breaking spaces, and Unicode normalization

import { ZERO_WIDTH } from 'vuoto/consts';
const rule = {
    meta: {
        type: 'problem',
        docs: {
            description: 'disallow zero-width characters (U+200B, U+200C, U+200D, U+FEFF, U+2060)',
            recommended: true,
        },
        fixable: 'code',
        schema: [],
        messages: {
            unexpected: 'Unexpected zero-width character {{code}} ({{name}}).',
        },
    },
    create(context) {
        const sourceCode = context.sourceCode;
        const text = sourceCode.text;
        return {
            Program() {
                let match;
                while ((match = ZERO_WIDTH.exec(text)) !== null) {
                    const index = match.index;
                    const char = match[0];
                    const charMap = {
                        '\u200B': 'ZERO WIDTH SPACE',
                        '\u200C': 'ZERO WIDTH NON-JOINER',
                        '\u200D': 'ZERO WIDTH JOINER',
                        '\uFEFF': 'ZERO WIDTH NO-BREAK SPACE (BOM)',
                        '\u2060': 'WORD JOINER',
                    };
                    context.report({
                        loc: sourceCode.getLocFromIndex(index),
                        messageId: 'unexpected',
                        data: {
                            code: `U+${char.codePointAt(0).toString(16).toUpperCase().padStart(4, '0')}`,
                            name: charMap[char] || 'Unknown',
                        },
                        fix(fixer) {
                            return fixer.removeRange([index, index + char.length]);
                        },
                    });
                }
            },
        };
    },
};
export default rule;