Method for controlling window and electronic device therefor

An operating method of an electronic device, the method comprising:

• controlling a display to display a plurality of contents on the display;
• determining a first content from among the plurality of contents, and a second content that is distinct from the first content, according to attribute information of each of the plurality of contents;
• identifying that a region of the display is extended while the plurality of contents are displayed on the display;
• in response to identifying that the region of the display is starting to extend, changing a resolution of the first content, among the plurality of displayed contents, to correspond to a size of the extended region of the display while the display is being extended;
• and
• in response to identifying that an extension of the display is completed, changing a resolution of the second content, among the plurality of displayed contents, to correspond to the size of the extended region of the display after the extension of the display is completed.

An electronic device comprising:

• a first housing;
• a second housing that overlaps the first housing at least in part and is movable;
• a display including:
• at least a first region exposed to an outside of the electronic device through a front surface of the electronic device;
• and
• a second region extending from the first region of the display and configured to be drawn out from an inside of the first housing and exposed to the outside of the electronic device along with the first region when the electronic device switches from a first state to a second state, wherein the second region being is into the first housing when the electronic device switches from the second state to the first state;
• and
• at least one processor operatively connected with the display, wherein the at least one processor is configured to:
• control the display to display a plurality of contents on the display;
• determine a first content from among the plurality of contents, and a second content that is distinct from the first content, according to attribute information of each of the plurality of contents;
• identify that a region of the display is contracted while the plurality of contents are displayed on the display;
• in response to identifying that the region of the display is starting to contract, change a resolution of the first content, among the plurality of displayed contents, to correspond to a size of the contracted region of the display while the display is being contracted;
• and
• in response to identifying that a contraction of the display is completed, change a resolution of the second content, among the plurality of displayed contents, to correspond to the size of the contracted region of the display from a time when a length in a contraction direction of the display exposed to the outside of the electronic device is shorter than a length in the contraction direction of a window in which the second content is displayed.