Method getResponseHeader

packages/core/xhr/index.ts:291–302

(header: string)

	}

	public getResponseHeader(header: string): string {
		if (isString(header) && this._readyState > 1 && this._headers && !this._errorFlag) {
			header = header.toLowerCase();
			for (const i in this._headers) {
				if (i.toLowerCase() === header) {
					return this._headers[i];
				}
			}
		}

		return null;
	}

	public overrideMimeType(mime: string) {
		if (this._readyState === this.LOADING || this._readyState === this.DONE) {