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demandware-template-debugger

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An instructional repository for techniques used in debugging Demandware templates.

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# demandware-template-debugger
An instructional repository for techniques used in debugging Demandware templates.

# Usage #
First, make sure that the TemplateDebugger.ds file is included in the template. This can be done within its own `<isscript/>` block, or an existing one. Keep in mind that the include needs to be present before the `TemplateDebugger.debug()` method can be utilized. Therefore, it is recommended that a dedicated `<isscript/>` block be used, and placed at the top of the ISML file. It is important to delete these elements once done debugging, to avoid null reference errors or performance issues in production environments.

<iscomment> DELETE AFTER USE: V !!!! </iscomment>
    <isscript>var TemplateDebugger = require('int_dev_suite/cartridge/scripts/util/TemplateDebugger.ds');</isscript>
    <iscomment> DELETE AFTER USE: ^ !!!! </iscomment>

Once the TemplateDebugger.ds file is included, place a `TemplateDebugger.debug()` call in any existing `<isscript/>` bock, or create a dedicated `<isscript/>` block. Any variable, either in an `<isscript/>` block, or an `<isset/>` declaration, that was present before the `TemplateDebugger.debug()` call will be visible.

Multiple `TemplateDebugger.debug()` calls may be required. You need one call for each individual breakpoint needed.

<iscomment> DELETE AFTER USE: V !!!! </iscomment>
    <isscript>TemplateDebugger.debug();</isscript>
    <iscomment> DELETE AFTER USE: ^ !!!! </iscomment>

Once the required tags are in place, add a script debugger breakpoint to the line with the `return` statement of the `exports.debug()` method. Run the script debugger, and navigate to the correct pipeline that will render the ISML file being debugged.

# Recommended Alternate / Advanced Usage (modules directory) #
This method provides the same benefits as above, but you can simplify the way 
you call the debug helper using `require`. For example, since `require` 
caches files, there's little overhead for calling require targeting the same 
file repeatedly. In addition, Demandware's `require` implementation checks for 
packages in a 'modules' folder in your code version. So you can put 
TemplateDebugger.ds in a modules directory within your project and then do:

<iscomment> DELETE AFTER USE: V !!!! </iscomment>
    <isscript>require('TemplateDebugger.ds').debug()</isscript>
    <iscomment> DELETE AFTER USE: ^ !!!! </iscomment>

This will perform the same thing as shown in the standard "Usage" section above. Finally, add a script debugger breakpoint to the line with the `return` statement of the `exports.debug()` method. Run the script debugger, and navigate to the correct pipeline that will render the ISML file being debugged.

When you use the modules directory your project's folders would look something like this:

app_storefront_controllers/
    app_storefront_core/
    int_bar/
    int_foo/
    modules/
      |- TemplateDebugger.ds

# Viewing the variables in your template #
Within the "Debug View" window, it will list the active breakpoint. From there, click the, "-toplevel-" thread. Doing so will open the Template's thread, at which point, the template variables are visible in the "Variables View" window.

![Screenshot of Debug View after clicking '-toplevel-'](https://raw.githubusercontent.com/sholsinger/demandware-template-debugger/master/toplevel-debug-view.png "Top Level Debug View")

# Authors & Contributors

* Steve Holsinger (@sholsinger) - Original author ([see original](https://www.evernote.com/shard/s61/sh/524210c5-3830-4681-8fe2-0af02f881e7d/b986e34e00b62ddb))
* Ethan Gaudette (@egaudette)

# Contributing
Simply submit a pull request. We also welcome issues to be entered by the community if you are unable to address the issue yourself.

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