When multiple decorators apply to a single declaration, their evaluation is similar to . In this model, when composing functions f and g, the resulting composite (f ∘ g)(x) is equivalent to f(g(x)).

As such, the following steps are performed when evaluating multiple decorators on a single declaration in TypeScript:

1. The expressions for each decorator are evaluated top-to-bottom.
2. The results are then called as functions from bottom-to-top.

If we were to use , we can observe this evaluation order with the following example:

function f() {    console.log("f(): evaluated");    return function (target, propertyKey: string, descriptor: PropertyDescriptor) {        console.log("f(): called");    }}function g() {    console.log("g(): evaluated");    return function (target, propertyKey: string, descriptor: PropertyDescriptor) {        console.log("g(): called");    }}class C {    @f()    @g()    method() {}}/*f(): evaluatedg(): evaluatedg(): calledf(): called*/