thing

strvar.js

function strvar(fn, scope) {
    if (scope === undefined) scope = js.scope;
    const f = new File(fn);
    if (!f.open('r')) throw 'nuh uh';
    var txt = f.read();
    f.close();
    txt = txt.replace(/@strvar:(.*?)@/ig, function (m, p) {
        return scope[p];
    });
    console.putmsg(txt);
}