json() {
			if (this.responseJSON == null)
				this.responseJSON = JSON.parse(this.responseText);

			return this.responseJSON;
		}
Access the response content as JSON data.

@instance
@memberof LuCI.response
@throws {SyntaxError}
Throws `SyntaxError` if the content isn't valid JSON.

@returns {*}
The parsed JSON data.