5. A development system for a web application, comprising: a computing device having a hardware processor configured to operate the web application as a server and to provide a developer interface to a remote client developer device for the web application, the hardware processor further configured to execute: a set of instructions for script generation and modification, adapted to, in a running state of the web application, generate or modify a script code used to perform a predetermined function; a script parser, adapted to parse the generated script code or the modified script code to correspondingly generate an object type which performs a new function, or to modify an object type which performs an existing function; and an object manager, adapted to (i) generate a new function object or to modify an existing function object according to the generated object type which performs the new function or the modified object type which performs the existing function, (ii) assign a unique identifier to each generated or modified object type, and (iii) organize invoking relationships between the new function object and other objects, or invoking relationships between the modified function object and other objects by setting the invoking relationships using the assigned unique identifiers, wherein the web application performs the predetermined function based on the generated new function object or the modified existing function object while remaining in the running state.
8. The development system according to claim 5 , wherein the set of instructions for script generation and modification comprises: a code editor, adapted to identify an existing script code corresponding to the existing function and to modify the identified existing script code for the predetermined function.