Run results for: Comparing various way to check if a string is within the values of a typescript enum .

Given this typescript code // typescript like enum Status { A = 'a', B = 'b', C = 'c', D = 'd' } what is the faster simpler way to know if a string st is within the enum values.

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36

Browser: Chrome 97

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
compare individual strings	1854259.0 Ops/sec
use a regex	4705342.0 Ops/sec
use a set	5307431.0 Ops/sec

Script Preparation code:

var Status;
(function(Status) {
    Status["A"] = "a";
    Status["B"] = "b";
    Status["C"] = "c";
    Status["D"] = "d";
})(Status || (Status = {}));

var st = 'c'

var regexp1 = new RegExp(`${Status.A}|${Status.B}|${Status.C}`, 'i');
var set1 = new Set([Status.A,Status.B,Status.C]);

Tests:

compare individual strings
return (st === Status.A || st === Status.B || st === Status.C)
use a regex
return regexp1.test(st)
use a set
return set1.has(st)

Run results for: Comparing various way to check if a string is within the values of a typescript enum .

Given this typescript code // typescript like enum Status { A = 'a', B = 'b', C = 'c', D = 'd' } what is the faster simpler way to know if a string st is within the enum values.

compare individual strings

use a regex

use a set