Slidable electronic device and operating method thereof

An electronic device comprising:

• a housing;
• a flexible display including a display area extendable in one or more directions with respect to the housing by moving a portion of the flexible display through the housing to be visually exposed;
• memory storing one or more computer programs;
• and
• one or more processors communicatively coupled to the flexible display and the memory,
• wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, cause the electronic device to:
• display first content on a first area of the flexible display,
• detect an event for displaying second content related to the first content,
• identify an attribute of the second content based on the detecting of the event,
• identify a direction in which the flexible display is to be extended based on the attribute of the second content, and
• display at least a portion of the second content in a second area of the flexible display extended in the identified direction, and
• wherein, to identify the direction in which the flexible display is to be extended, the one or more computer programs further include computer-executable instructions that, when executed by the one or more processors individually or collectively, cause the electronic device to:
• identify a position of a predetermined area where the second content is to be displayed on the first area with respect to a reference axis of the first area, and
• identify the direction in which the flexible display is to be extended based on the position of the predetermined area with respect to the reference axis of the first area.