Method for browser to print in Web application

The invention discloses a method for a browser to print in a Web application, and relates to the technical field of Web application development. According to the specific implementation scheme, the browser receives a task request of a user side and sends the task request to a server side; the server automatically generates a PDF document needing to be printed according to the task request, and returns a downloading address of the PDF document to the browser; the browser uses the downloading address as a request parameter to access the user-defined URI Scheme, and when the Windows operating system receives a URI Scheme request, a printing application program is automatically aroused; and the printing application program accesses the server for downloading according to the downloading address, and calls the printer to complete printing. The URI Scheme is used in the browser to trigger the printing application program for printing, the printing data format and paging can be accurately controlled, the printing de