I am working on SCEditor and encountering one useless Javascript feature after the other. I am removing them all to make the code understandable. For example, removing useless bind() changes:

function isTypeof(type, arg) {
    return typeof arg === type;
}
var isString = isTypeof.bind(null, 'string');
var isUndefined = isTypeof.bind(null, 'undefined');
var isFunction = isTypeof.bind(null, 'function');
var isNumber = isTypeof.bind(null, 'number');

to:

function isTypeof(type) {
    return function(arg) {
        return typeof arg === type;
    };
}
var isString = isTypeof('string');
var isUndefined = isTypeof('undefined');
var isFunction = isTypeof('function');
var isNumber = isTypeof('number');

SCEditor is much better than most modern crap, but it is still full of bad code like this. I am removing bind(), call(), apply(), all classes, and any other uses of useless features.