Ionic v5 - Is it posible to cache/reuse Modal for multiple uses?

Ionic Framework Ionic Angular
1

Scenario:

we have a list of items, when i click one of them, the modal is opened to show the details of the item.

Issue:

On slow phones there is a delay (about 2-3 seconds) between the click and the modal actually being shown.

How to reproduce:

  1. go to: https://ionicframework.com/docs/api/modal
  2. open the chrome developer tools (F12)
  3. clic on the “Performance” tab.
  4. set the CPU throttling to “4x slowdown” or “6x slowndown”.

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  1. Clic on the “Show Modal” of the page (open and close several times, every time will be a delay)

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So my question is. Is there any way to avoid the modal to be created and destroyed every time? Since i know that it will be used multiple time with the same template (component), can i cached it to be reused and save the time that takes create it again and again?

Thanks!

1 Like
2

Why don’t you instead try or consider an accordion or collapsible component that you can re-use
Examples…
https://www.w3schools.com/howto/howto_js_collapsible.asp

https://www.w3schools.com/howto/howto_js_accordion.asp

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3

Hi alexmigwi

Thanks for your suguestion, but using accordions will change the current behavior, as will do using a route. Also the information into the modal will be to much for a acording to not affec the user experience.

4

You can try use css, example:

When the click user in button close, you can use visibility: hidden and when the click user in show modal you use visibility: visible;

Observation:
If you send big information to modal, it will really take time to load, you can consider use some state managment , for example Ngrx.

5

One perhaps controversial thing you can do is to completely forget that lazy loading exists. Put everything in a single AppModule.

6

Thanks for your observation, actually I’m sendding an object to the modal, i’ll try using some service to tranfer the data and let you know.

7

I’m pre-loading everything, even ionic components (ion-input, ion-toggle, etc), it looks like the issue is not related with the network. I would guess it takes too long rendering. Since you can reproduce it using https://ionicframework.com/docs/api/modal, would say it is not data related either.