function createSecKeyDeprecatedDeprecateduse Deno.upgradeWebSocket Returns base64 encoded 16 bytes string for Sec-WebSocket-Key header. import { createSecKey } from "https://deno.land/std@0.114.0/ws/mod.ts"; Deprecateduse Deno.upgradeWebSocket Returns base64 encoded 16 bytes string for Sec-WebSocket-Key header. createSecKey(): stringReturnsstring