JSFiddle - React, Tailwind, and code Playground

JavaScript

var obj = {
    foo: function() {},
    bar: function() {},
    baz: true
};

function getMethods(object) {
    return Object.keys(object).filter(function(key) {
        return typeof object[key] == 'function';
    });
}

console.log(getMethods(obj)); // [foo, bar]