Call external function from expression

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- macube
- - Joined 18 Oct, 2016
  - 33 topics • 225 posts
- 1
- 25 Jun, 2019
- Quote
I'm use the example file "Loading script & WASM" from construct 3. In the scriptfile "external.js" i'm add a new function:

function testing() { return "ok it works!"; }

How can i call in a expression the function testing in script external.js and get the callback "ok it works!" ?
Tagged:

javascript
expression
callback
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- Ashley Construct Team Founder
- Moderator
- - Joined 21 May, 2007
  - 642 topics • 27,433 posts
- 2
- 25 Jun, 2019
- Quote
Create an event sheet function with a string return value. Inside the event sheet function, add a script action with:
```
runtime.setReturnValue(testing());
```
Now you can call the event sheet function as an expression, and it returns a value from JS.

The general approach is to "wrap" JS functions with event functions.
- macube
- - Joined 18 Oct, 2016
  - 33 topics • 225 posts
- 1
- 25 Jun, 2019
- Quote
It works now, thank you.