@davidenke/marked-text-renderer/dist/index.js

A custom renderer for Marked to render markdown to plain text

import { Renderer } from 'marked';
export class TextRenderer extends Renderer {
    #fancyMode = false;
    constructor(fancyMode = false, options) {
        super(options);
        this.#fancyMode = Boolean(fancyMode);
    }
    code(tokens) {
        if (!this.#fancyMode)
            return tokens.text;
        let output = '';
        if (tokens.lang) {
            output = `${tokens.lang}:\n`;
        }
        tokens.text.split('\n').forEach(line => {
            output = `${output}\t${line}\n`;
        });
        return output;
    }
    blockquote({ tokens }) {
        const quote = this.parser.parse(tokens);
        let parsedQuote = quote;
        if (parsedQuote.endsWith('\n')) {
            parsedQuote = parsedQuote.slice(0, -1);
        }
        if (!this.#fancyMode)
            return `"${quote}"\n`;
        return `\n\t"${quote
            .split('\n')
            .map((line, i) => {
            if (i === 0)
                return line;
            if (line === '\t')
                return '';
            if (line === '')
                return '';
            return `\t${line}`;
        })
            .join('\n')}"\n`;
    }
    html() {
        return '';
    }
    heading(tokens) {
        const text = tokens.text;
        if (this.#fancyMode) {
            if (tokens.depth === 1) {
                return `\n${text}\n\n`;
            }
            else if (tokens.depth === 2) {
                return `\n${text}\n`;
            }
        }
        return `${text}\n`;
    }
    hr() {
        if (!this.#fancyMode)
            return '\n';
        return `${'-'.repeat(25)}\n`; // 25 hyphens
    }
    list({ items }) {
        return `${items.map(item => this.listitem(item)).join('\n')}\n`;
    }
    listitem(tokens) {
        return `- ${tokens.text}`;
    }
    checkbox(tokens) {
        if (!this.#fancyMode)
            return '';
        return tokens.checked ? '[x]\n' : '[ ]\n';
    }
    paragraph({ tokens }) {
        return `${this.parser.parseInline(tokens)}\n`;
    }
    table(tokens) {
        return `${tokens.header}\n${tokens.rows
            .flatMap(cells => cells.map(cell => cell.text))
            .join('\n')}\n`;
    }
    tablerow(tokens) {
        if (!this.#fancyMode)
            return `\n${tokens.text}\n`;
        return tokens.text.slice(1) + ' |\n';
    }
    tablecell(tokens) {
        if (!this.#fancyMode)
            return tokens.text;
        return ` | ${tokens.text}`;
    }
    // span level renderer
    strong(tokens) {
        if (!this.#fancyMode)
            return tokens.text;
        return tokens.text.toUpperCase();
    }
    em({ tokens }) {
        if (!this.#fancyMode)
            return this.parser.parseInline(tokens);
        return `*${this.parser.parseInline(tokens)}*`;
    }
    codespan(tokens) {
        if (!this.#fancyMode)
            return tokens.text;
        return `\`${tokens.text}\``;
    }
    br() {
        return '\n';
    }
    del(tokens) {
        if (!this.#fancyMode)
            return tokens.text;
        return `~${tokens.text}~`;
    }
    link(tokens) {
        if (!this.#fancyMode)
            return tokens.text;
        const { href, title, text } = tokens;
        return `${text} (${title ? `${title} ` : ''}${href})`;
    }
    image(tokens) {
        if (!this.#fancyMode)
            return tokens.text;
        const { href, title, text } = tokens;
        return `${text}(${title ? `${title} ` : ''}${href})`;
    }
    text(tokens) {
        return tokens.text;
    }
}