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OutgoingMessage.prototype.hasHeader - http - Node documentation
method OutgoingMessage.prototype.hasHeader

Usage in Deno

import { OutgoingMessage } from "node:http";
OutgoingMessage.prototype.hasHeader(name: string): boolean

Returns true if the header identified by name is currently set in the outgoing headers. The header name is case-insensitive.

const hasContentType = outgoingMessage.hasHeader('content-type');

Parameters

name: string

Return Type

boolean