This pulls the GM notes from a token on Roll20 and whispers them to the chat

gmnote.js

on('ready',()=>{

    const blockElements = [
        'p', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'ol', 'ul', 'pre', 'address',
        'blockquote', 'dl', 'div', 'fieldset', 'form', 'hr', 'noscript', 'table','br'
    ];
    const rStart=new RegExp(`<\\s*(?:${blockElements.join('|')})\\b[^>]*>`,'ig');
    const rEnd=new RegExp(`<\\s*\\/\\s*(?:${blockElements.join('|')})\\b[^>]*>`,'ig');

    const getLines = (str) => 
        (rStart.test(str)
            ? str
                .replace(/[\n\r]+/g,' ')
                .replace(rStart,"\r$&")
                .replace(rEnd,"$&\r")
                .split(/[\n\r]+/)
            : str
                .split(/(?:[\n\r]+|<br\/?>)/)
            )
            .map((s)=>s.trim())
            .filter((s)=>s.length)
            ;
    const cmdRegex = /^!(w?)gmnote(?:-(.*))?(.*)$/i;

    on('chat:message',(msg) => {
        if('api' === msg.type && cmdRegex.test(msg.content) && playerIsGM(msg.playerid) ){
            let parts = msg.content.split(/\s+--ids\s+/i);
            let match=parts[0].match(cmdRegex);
            let output = match[1].length ? '/w gm ' : '';
            let regex;
            let ids = (msg.selected ? msg.selected.map((o)=>o._id) : []);
            if(parts[1]){
                ids = [...ids, ...parts[1].split(/\s+/)];
            }

            if(match[2]){
                regex = new RegExp(`^${match[2]}`,'i');
            }

            ids.map( id => getObj('graphic',id))
                .filter( o =>undefined !== o && o.get('gmnotes').length > 0 )
                .forEach( o => {
                    log(o);
                    if(regex){
                        let lines = _.filter(
                            getLines(unescape(o.get('gmnotes'))),
                            (l) => regex.test(l.replace(/<[^>]*>/g,''))
                        ).join('<br>');
                        sendChat(o.get('name'), `${output}${lines}`);
                    } else {
                        sendChat(o.get('name'), `${output} &{template:spell}}{{name=${unescape(o.get('gmnotes')).replace(/(?:[\n\r]+|<br\/?>)/g,'<br>')} }}`);
                    }
                });
        }
    });
});