Function.prototype.bind vs fn(callback, ctx)

gistfile1.js

this.myMethod(callback.bind(this))

// vs.

this.myMethod(callback, this)

// In the former, context is in the hands of the user. In the latter, the context is the responsibility of the owner of `myMethod`. Every method in that API that accepts a callback now requires a bunch of boilerplate, e.g.:

myMethod: function (callback, ctx) {
    ctx = (ctx || null)
    // do stuff...
    return callback.apply(ctx, args)
}