Display operator informaton on mouse-over

Search Terms

operator information definition mouse over hover preview tool-tip

Suggestion

Show a tooltip when hovering over operators like +=, %or ===. The tooltip should explain the operator.

I was told in https://github.com/microsoft/vscode/issues/107046 to apply here.

Use Cases

As a beginner developer, I usually download foreign code to help me understand implementations. Often the more experienced developers use operators I do not know. It would be very helpful if the IDE could show me a short definition of that operator when I hover my mouse over it, similar to how it tells me what a function does. Ideally it also tells me how the operator is called and gives a link to some online documentation.

Examples

When I have code like var x = condition ? 12 : (int?)null; I can hover over ? or : and it shows tool-tip like "Ternary operator: is this condition true ? yes : no".

Or a more simple example: What does x += y do? Hover: "Addition assignment: x = x + y".

Checklist

My suggestion meets these guidelines:

• [ x] This wouldn't be a breaking change in existing TypeScript/JavaScript code
• [ x] This wouldn't change the runtime behavior of existing JavaScript code
• [ x] This could be implemented without emitting different JS based on the types of the expressions
• [ x] This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
• [ x] This feature would agree with the rest of TypeScript's Design Goals.

(To be perfectly honest, I don't really understand all of the above, but I'm guessing yes..)

Beginne damit, das angeforderte Hover-Verhalten für Operatoren und das verknüpfte VS Code-Issue zu prüfen. Es ist keine Implementierungsdatei, kein Test und kein Einstiegspunkt angegeben, daher besteht die erste Aufgabe darin, den relevanten Bereich des TypeScript-Sprachdienstes zu finden. Als abgeschlossen gilt die Aufgabe, wenn das Hovering über unterstützten Operatoren eine kurze Erklärung, Hinweise zur Verwendung und idealerweise Dokumentationslinks anzeigt.