angulartraining | This project was generated with Angular CLI version | Generator Utils library
kandi X-RAY | angulartraining Summary
kandi X-RAY | angulartraining Summary
This project was generated with Angular CLI version 8.3.2.
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QUESTION
On my application I defined a service to call my api to retrieve some data. This data, on api side, comes from a database table that only changes like 1 time/year, and therefore I'd like to retrieve this data only one time (to increase the app performance).
I try using cache (for instance this example) but it doesn't fit very well on this case because whenever my user refresh the page the api is called again.
My goal is "lost" my values only when my application is restarted or after some defined amount of time.
What's the best way to do it? Something like having a singleton?
...ANSWER
Answered 2021-May-03 at 05:09You could use the localstorage to save this data. You mentioned two scenarios for cache busting -
- Defined amount of time
- Application restarted
you can achieve both by setting extra "metadata" on the items you save - timestamp for when you first saved the data, and a hash for your application (which you will need to set in your code). This way, when getting the item, you can check both the version and the date inserted, if one of those doesnt meet your conditions, delete the localStorage entry and fetch from the server.
All this logic should be implemented in your service (preferably as generic code which can be easily repeated for different calls (maybe a decorator?)
QUESTION
so I am attempting to poll my server. I am trying to poll my server every 5 seconds. And the poll times out after one minute. I have a few console logs in the method for debugging but the only console.log that fires even after waiting 5 seconds is 'validate stream start'
I followed this tutorial without creating a separate service as I just need it for this one page in my application.
I'm willing to bet its a simple error or a misunderstanding in how these rxjs operators work.
What am I doing wrong?
...ANSWER
Answered 2021-Mar-08 at 20:34Creates an Observable that starts emitting after an dueTime
and emits ever increasing numbers after each period
of time thereafter.
QUESTION
I want to have absolute paths in my project to avoid ugly paths and to have constant imports wherever a file is in the project tree.
I have added this in the tsconfig.json
ANSWER
Answered 2019-Sep-02 at 18:52Navigate to
File>Preferences>Settings>User Settings
on VSCodeSet
"typescript.preferences.importModuleSpecifier": "non-relative"
QUESTION
Heys guys,
i am following a tutorial to learning basic angularjs 2.0 skills. In my case
...ANSWER
Answered 2017-Jan-25 at 12:38You have typo inside tsconfig.json
.
Change moduleResolutions
to moduleResolution
.
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