In VS Code, you can use CTRL + Space to trigger suggestion (at least that's what I use for Trigger Suggest command). The command will show the suggestion; e.g., using it on an object will show it's method and properties.
It will also show the type hint only for the currently selected suggestion. How can I make it to show all type hint for all suggestion?
I think you're at the mercy of however the extension of interest is implementing suggestions using the VS Code API.
It's a bit complicated and there's some history involved. The relevant extension API points include CompletionItemProvider<T>
, CompletionItem
, and CompletionItemLabel
. CompletionItem
has detail?: string
, documentation?: string | MarkdownString
, and label: string | CompletionItemLabel
.
Providers can delay the computation of the detail and documentation properties by implementing the resolveCompletionItem-function.
When the CompletionItemLabel
form of label
is used and its description
and/or detail
properties are populated, those are always rendered for the suggestion in the inline details portion of the suggestion widget- regardless of whether the suggestion is the currently selected one. Otherwise, the CompletionItem
's detail
property is rendered in the inline details portion of the suggestion widget for the currently selected suggestion only (probably due to the complication of resolveCompletionItem
), and only when the suggestion details panel is toggled off/closed (when it is toggled on/open, the CompletionItem
's detail
and documentation
are rendered in the suggestion details panel if they exist).
If you're interested in figuring out exactly what your extension of interest is doing, you can always go read its source code (if it's open-source), or you can dissect your VS Code as it's running to figure it out.
Note that you can toggle whether inline details are rendered at all for the suggest widget using the editor.suggest.showInlineDetails
setting, which defaults to true
.
If you're interested in the history of how this CompletionItemLabel
thing came about, see Consider showing completion item detail if available for all list items #39441, which I found by googling "github vscode issues suggestion inline details for all labels always
".