javascript es6 modules

MiServer is Dyalog's APL-based web development framework

Re: javascript es6 modules

Postby bry on Wed Apr 20, 2022 6:43 pm

Michael
Your code worked on chrome for me.
In addition
Your ThreePage.dyalog code was very instructive. It showed me the syntax
for:
1) how to use type=importmap with _.script ScriptFollows
2) how to use type=module with _.script
It also showed
3) how to capture info in a Page's or Template's public field
4) how to construct a script on the fly and add it to the Head

I noticed that:
When referencing a template in a page, I believe
that if I use #.ThreePage DUI looks in ServerRoot/Core
and if I use just ThreePage, DUI looks in SiteRoot/Code/Templates

Bryant
bry
 
Posts: 8
Joined: Wed Oct 11, 2017 6:16 pm

Re: javascript es6 modules

Postby Michael|Dyalog on Thu Apr 21, 2022 8:28 am

Bryant,
it's good news to see that this example served its purpose.
WRT loading, your assumptions are partially correct. Let's look in more detail at the process:

  • at startup, DUI loads code from disc into the workspace. Some bits that are relevant for us:
    • /DUI/Core goes into #
    • /app/Code goes into #
    • /app/Code/Templates goes into
            #.Pages
  • when the browser asks for a file: DUI checks if that file is a .mipage. If it is and if it is found in #.Pages (and has the file has the same timestamp as it had when we loaded it last time), that instance is called. If it does not exist, has a newer timestamp or a different extension, DUI searches the app folder. (BTW, you can also have a folder structure on disc that the URLs need to mirror, i.e. /a/b/c/foo.mipage asks for /app/a/b/c/foo.mipage).
  • when such a .mipage is instantiated, the interpreter requires that its base class exists - otherwise it throws an error. The base class will exist if it exists in /app/Code/Templates (and thus was loaded at startup). If you refer to a class in #, it may have been loaded at startup from several possible locations - but it is recommended practice to keep the templates in their folder.
Notice that when the browser asks for a file, it is possible that that file will be loaded - but nothing else: the idea is to minimize processing when dealing with a request in order to provide minimal response times...

Also, if you end up writing tools that you need to use on > 1 .mipage, you don't have to duplicate that code in every page, just put it into the /app/Code folder. You can use .dyalog files that contain namespaces, classes or even simple fns.

I hope this helps for the next steps...

Michael
Michael|Dyalog
 
Posts: 23
Joined: Thu Mar 02, 2017 4:29 pm

Re: javascript es6 modules

Postby bry on Sun May 08, 2022 8:43 pm

Hi Michael
I am having another basic problem with DUI/MiServer.
I build a page with buttons; in a callback I clone
the selected button; then I try to append the cloned
button to an existing div. The cloned button appears
for a brief second and then disappears. I assume that
MiServer/DUI is reloading the entire page. I used APLJax
in the code and it still happens. What am I missing
about how pages are refreshed?

Thanks in advance

Bryant
bry
 
Posts: 8
Joined: Wed Oct 11, 2017 6:16 pm

Re: javascript es6 modules

Postby Michael|Dyalog on Mon May 09, 2022 5:19 am

Hi Bryant,

usually a callback does not trigger a reload of the page, so something must be going wrong somewhere - but it's impossible to say w/o seeing the code.
Feel free to email me {ForumHandle}@dyalog.com) - it would be great if you could zip the whole MiSite...
(Confidentiality will be kept, but we can discuss formal NDA as well, if neccessary)

Thanka

Michael
Michael|Dyalog
 
Posts: 23
Joined: Thu Mar 02, 2017 4:29 pm

Re: javascript es6 modules

Postby Vince|Dyalog on Mon May 09, 2022 8:44 am

Hi Bryant,

I thought I should add that when Michael gives his email address as forum handle that that is his name without the "|Dyalog" part of the forum handle text.

Regards,

Vince
Vince|Dyalog
 
Posts: 372
Joined: Wed Oct 01, 2008 9:39 am

Re: javascript es6 modules

Postby bry on Mon May 09, 2022 5:32 pm

Thanks Vince. That as my first guess, but when I tried it, it bounced.
Michael has since sent me email so I have his address.

Bryant
bry
 
Posts: 8
Joined: Wed Oct 11, 2017 6:16 pm

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