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OnStart deprecation - where do I place global variables/collections

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Posted on by Medoomi

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1) Am I correct in understanding that OnStart will itself be deprecated, not just the Navigate() function within OnStart?

2) When initializing variables/collections, are named formulas meant to be a replacement for using OnStart for these?

3) Does anyone know if there will be a global location one can execute a formula a single time (instead of on-demand like named formulas).

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Building Power Apps

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DavidZoon 738 Most Valuable Professional on at

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Hello @Medoomi ,

1) OnStart will not be deprecated, just the Navigate() function within

2) Named formulas will not replace global variables, they will be complementary. Depending on the need, it will be more appropriate to use one or the other type.
Example 1: store data that is always updated: very simple with named formulas, where you had to go through a timer to regularly update the global variable
Example 2: having a global value whose value must be changed according to events, it will be necessary to prefer the global variable because we cannot change the formula of a named formula or do a set().

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kevinhowells 4 on at

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I stopped using onStart and instead use a custom component to house all my variables.
For example:
> Create a custom Component: "_variables",
> Allow that component to access the Apps scope,
> Add a custom -input type- property to _variables.
> make this a Boolean object
> name this input whatever you want your variable to be called.
> Give this variable a default value: Blank()
> Be sure to select the OnReset checkbox

you can now add this component to each screen and use the OnVisible and OnHidden properties of each screen to adjust your variables as needed.

> you can go a step further and add Screen Inputs/Outputs to the _variables custom properties.
this then allows you to create a "Variables" Screen that contains a sort of "Global" variable table.
It is here, on the Variables Screen that you can do some real magic with "global" references

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