Hi Phil
You can use a construction like this to choose the right implementation:
var xhr = $tw.browser ? XMLHttpRequest :
require("$:/path/to/my/polyfill").XMLHttpRequest;
And then you'd use xhr as the XMLHttpRequest object
Best wishes
Jeremy
--
Jeremy Ruston
[email protected]
https://jermolene.com
> On 14 Nov 2019, at 02:56, Philip Wonski <[email protected]> wrote:
>
>
> Jeremy,
>
> Following up on this, I believe I have imported the module without issue
> (verified by checking the index.js output of ``--build lambda`` ).
>
> However, testing the Lambda in AWS still throws an error.
>
> It seems the issue is that my javascript macro that makes the AJAX call is
> actually just using the built-in httprequest capability within TW5. As such,
> the AWS console is telling me the variable is undefined in a bunch of
> tiddlers (tiddlers listed at the bottom of this message).
>
> So, forgive me if this is a bit of a newbie question, but how would I go
> about making the variable definition global so that TW itself has a
> definition for this type of request?
>
> AWS error with tiddlers using httprequest (note $:/sandbox/myjax_json.js is
> my javascript macro... it works well in the browser):
>
> {
> "errorType": "ReferenceError",
> "errorMessage": "XMLHttpRequest is not defined",
> "trace": [
> "ReferenceError: XMLHttpRequest is not defined",
> " at Object.exports.httpRequest
> ($:/core/modules/utils/dom/http.js:27:13)",
> " at MacroCallWidget.exports.run ($:/sandbox/myjax_json.js:42:13)",
> " at MacroCallWidget.Widget.evaluateMacroModule
> ($:/core/modules/widgets/widget.js:215:21)",
> " at MacroCallWidget.Widget.getVariableInfo
> ($:/core/modules/widgets/widget.js:133:14)",
> " at MacroCallWidget.execute
> ($:/core/modules/widgets/macrocall.js:52:23)",
> " at MacroCallWidget.render
> ($:/core/modules/widgets/macrocall.js:32:7)",
> " at Widget.renderChildren ($:/core/modules/widgets/widget.js:390:15)",
> " at Widget.render ($:/core/modules/widgets/widget.js:75:7)",
> " at $tw.Wiki.exports.renderTiddler ($:/core/modules/wiki.js:1054:13)",
> " at Command.subCommands.s3-rendertiddler
> ($:/plugins/tiddlywiki/aws/command.js:110:33)"
> ]
> }
>
>
> Phil
>
>
>> On Monday, November 4, 2019 at 9:48:30 PM UTC-5, Philip Wonski wrote:
>> Thank you Jeremy and Tony for the replies (and noted on the separate Dev
>> group).
>>
>> Appreciate the tips, I will work off of the examples. I've been itching to
>> do this sort of thing to extend the use of 'TW on AWS' as a static site
>> generator.
>>
>> Will report back with any worthwhile documentation for other learners.
>>
>> Phil
>>
>>> On Saturday, November 2, 2019 at 12:37:42 PM UTC-4, Jeremy Ruston wrote:
>>> Hi Phil
>>>
>>> As you say, the best solution is to wrap the xmlhttprequest JS file into a
>>> tiddler, and then require that tiddler.
>>>
>>> The basic approach is to use a “tiddlywiki.files” file to turn the raw JS
>>> file into a tiddler. This mechanism includes the possibility of adding a
>>> prefix/suffix to the text of the file:
>>>
>>> https://tiddlywiki.com/#tiddlywiki.files%20Files
>>>
>>> There are a number of examples of third party modules wrapped for
>>> TiddlyWiki in the core repo:
>>>
>>> https://github.com/Jermolene/TiddlyWiki5/tree/master/plugins/tiddlywiki
>>>
>>> In particular, the jszip plugin contains an example of publishing a module
>>> as a tiddler, and the AWS plugin contains an example of using it.
>>>
>>> Best wishes
>>>
>>> Jeremy
>>>
>>>
>>>> On 31 Oct 2019, at 17:27, Philip Wonski <[email protected]> wrote:
>>>>
>>>> Hi Group-
>>>>
>>>> 1) I have a TW that does some frontend AJAX using simple XMLHttpRequest in
>>>> the browser.
>>>>
>>>> 2) If I try to render the AJAX tiddler in Lambda, it throws the common
>>>> node error since node requires a separate package xmlhttprequest.
>>>>
>>>> 3) My question is, how best to include this dependency in the Lambda. I
>>>> tried first with npm locally, then zipping the updated package.json plus
>>>> the node_modules folder with xmlhttprequest module included.
>>>>
>>>> 3b- this still throws an error as the lambda is not finding the module.
>>>> Presumably I am violating "everything is a tiddler" and need my js inside
>>>> the index.js.
>>>>
>>>> 3c- so it seems better approach is to require the module as a tiddler like
>>>> var XMLHttpRequest = require("$:/mymodules/xmlhttprequest").XMLHttpRequest;
>>>>
>>>>
>>>> But I am new to creating modules in TW, so before I waste hours with trial
>>>> and error I figured I'd make sure I'm on the right track. How should my
>>>> original xmlhttprequest.js be modified so that it works as a tiddler like
>>>> $:/mymodules/xmlhttprequest?
>>>>
>>>>
>>>> Sincere thanks,
>>>>
>>>> Phil
>>>>
>>>>
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>>>
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