bulletList-template-tag.js

var { stripIndents } = require("common-tags")

const toTitle = ad => ad.title;
const ads = [{ title: 'a' }, { title: 'b' }];

function bulletLists(strs, ...lists) {
    return strs.reduce((compiled, str, ix) => {
        compiled.push(str);
        const list = lists[ix];
        if (list) {
            compiled.push('- ' + list.join('\n - '))
        }
        return compiled;
    }, []).join('');
}

function doit() {
    var a = stripIndents(bulletLists)`
        Please support your community:

        ${ads.map(toTitle)}

        (tap here to see more about our sponsors)
    `;
    
    return a;
}

doit();