1. A method comprising: acquiring, by a processor, a web page description to be edited; detecting, by the processor, a description that refers to a library written in an interpretive language in the acquired web page description; and generating, by the processor, a description of a modified web page in which the web page description is modified by inserting, into the web page description, code for sensing completion of initialization of the library corresponding to the detected description and code for editing a description in the interpretive language using the library corresponding to the detected description.