Is there some way to run Javascritpt in Delphi using Elements as Compiler?

Elements Oxygene
1

Hi

I’ve seen some scratch of this solution, but I didn’t find any doc related.

Is possible to run ECMAScript (Javascritpt) in Delphi using Elements as Compiler and Hydra as bridge?

Thank you.

2

Since Elements does not support JavaScript as a language to begin with:, no ;). Also, to use the Elements compiler in your app, yo’d need a deployment license for that, or every user of your app would need an Elements license ;).

That said, you should be able to host the .NET-based RemObjects Script for .NET | RemObjects Software in your Delphi app, using Hydra, if you create a .NET plugin (which you could do in Oxygene).

3

I’ve tried to running the sample, found on github, but it was an unsuccessful test.

Is there some updated sample?

Thx

4

Not really, but also Scriopt hasn’t changed in a long time. What fails with he sample?

5

Some Javascript basic funcion, like Alert etc…

I don’t know what exactly group of commands the interpreter run.

6

Okay. Some concrete steps would be appreciated som I can have someone have a look at this; otherwise it’s always a bit of a wild goose chase :wink:

7

Follow a C# example found in github.

This object is responsible for run the script

private RemObjects.Script.EcmaScriptComponent ScriptEngine;

Debugger.zip (628.6 KB)

8

Okay. I’ll have a check tomorrow, when i’m on Windows.

9

My apologies for the delay. What exact problem should I be looking out for? ran the DXebugger sample, and it seems to work fine. What script code are you running, and what misbehaves, exactly?

Note that alert() is a function provided by the web-browser, not JavaScript. You need to make that distinction. Script supports whatever APIs you define in your app to expose to it.

10

ah I think there’s some misunderstanding. Script provides the core ecmascript 5 functionality.

Alert (and anything else defined on Window): Window: alert() method - Web APIs | MDN is not part of that. Script provides a fully sandboxed Javascript engine, and out of the box no functionality to interact with the user directly (that’s on purpose). That said it’s really easy to add. Something like:

ScriptEngine.Globals.SetVariable("alert", (MyDelegate)((object[] args) => 
{
  MessageBox.Show(string.Join(" ", args.Select(e => e?.ToString() ?? ""));
}));

Would probably already give the functionality you want (typed from memory)

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11

This worked, thank you.

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