handlebars.js - How to check for empty-string, null or white-spaces in handlebar? - Stack Overflow

Handlebars.registerHelper('ifEmptyOrWhitespace', function (value, options) {
    if (!value) { return options.fn(this); }
    return value.replace(/\s*/g, '').length === 0
        ? options.fn(this)
        : options.inverse(this);
});