Overriding Inbuilt Functions – Product Documentation

Occasionally it is useful to replace the standard functionality of an ExtraView inbuilt JavaScript function with a user-defined JavaScript function. You can use JavaScript’s ability to return a Boolean answer in response to a query on the existence of a method. As an example, you may want to override the inbuilt ExtraView JavaScript function named SubmitChange. This method lives within a JavaScript file that is accessed from the Add Issue screen, named AddEdit.js.

The ExtraView JavaScript functions are located in the main ExtraView code directory on the application server, within the directory name javascript. Within this directory, another directory named user_javascript contains the user-defined JavaScript functions
Create a function named userSubmitChange in the file AddEdit.js
In the UserJavaScript.js file, create a function named _userSubmitChange, which actually performs the task needed

Now you can call userSubmitChange, which will look like the following code snippet –

    /**
     * this will call the _userSubmitChange if 
     * it is defined, else it calls submitChange
     */
    function userSubmitChange(field){
        if(_userSubmitChange){
            _userSubmitChange(field);
        } else {
            submitChange(field);
        }
    }

If the function _userSubmitChange doesn’t exist in the UserJavaScript.js file, then the standard submitChange function is used instead. Its existence is assured as it is contained in the standard ExtraView distribution file.