User`s guide

CHAPTER 5 Advanced Concepts and Tools
User’s Guide 59
To validate JavaScript code, click Compile. The result of the validation is
displayed in the Tasks tab of the Monitor area at the bottom area of the
Procedure Editor.
The Editor offers some efficient features to trace the execution of a script. You
can step through a code line-by-line or step through from one Breakpoint to
another. At any time, you can check the current value of a variable.
❖ To step through the code
Note The JavaScript Editor and Debugger will work without having input data
at the input port of the component. However, in order to produce meaningful
results, it is best to populate the input port with data before using the debugging
features.
1 Before stepping through the script, either validate the script or switch to
Debug mode.
A green arrow, pointing initially to line 1, indicates the progress of the
execution while stepping.
2 Make sure, that the result message in the Task tab contains “successful
compilation.”
3 To move to the next line, click Step.
At any point during stepping you can inspect the current value of a
variable. To do this, double-click the variable to select it, and then right-
click to open the pop-up menu. The pop-up menu displays the variable
name and the current value.
❖ To add and remove Breakpoints
Rather than stepping through the procedure line-by-line, you can include
Breakpoints at selected lines.
1 To include Breakpoints, click on the line where you want to set the
Breakpoint.
2 Right-click and select Add/Remove Breakpoint from the pop-up menu.
3 To remove a Breakpoint, right-click it and select Add/Remove from the
pop-up menu.
❖ To step to a Breakpoint
1 Click Go for each step.