WebFetchHeaders.appendmethod Headers.append#Headers.append(name: string,value: string,): voidAppends a new value onto an existing header inside a Headers object, or adds the header if it does not already exist. Parameters ##name: string#value: stringReturn Type #void
method Headers.append#Headers.append(name: string,value: string,): voidAppends a new value onto an existing header inside a Headers object, or adds the header if it does not already exist. Parameters ##name: string#value: stringReturn Type #void