Can't use '_' as triggerCharacters

[tlw-ray]

monaco.languages.registerCompletionItemProvider('myLanguage', {
triggerCharacters: ['_', '_', '-', ','],
provideCompletionItems: ... ...
}

eg. TABLE_FOO, TABLE_BAR, when type '_', editor completion 'FOO', 'BAR'。

As shown in the code above, commas and crossbars can complete the effect, and underscores or escaped underscores do not prompt the code correctly.

[hediet]

You can use underscore as trigger character, but then you must exclude it from your word pattern:

monaco.languages.register({
    id: "myLang",
});

monaco.languages.setLanguageConfiguration("myLang", {
    wordPattern: /[a-zA-Z]+/
});

monaco.languages.registerCompletionItemProvider("myLang", {
    triggerCharacters: ["_"],
    provideCompletionItems: function(model, position) {
        const word = model.getWordAtPosition(position)
            || { startColumn: position.column, endColumn: position.column };
        return {
            suggestions: [
                {
                    kind: monaco.languages.CompletionItemKind.Class,
                    label: "foo",
                    insertText: "foo",
                    range: {
                        startLineNumber: 1,
                        endLineNumber: 1,
                        startColumn: word.startColumn,
                        endColumn: word.endColumn,
                    }
                }
            ]
        };
    }
});

monaco.editor.create(document.getElementById("container"), {
    value: "",
    language: "myLang"
});

Typing a word pattern will trigger the completion provider by default without setting the word characters as triger characters. A suggest widget is only shown though if the completion items match with what the user typed.

[tlw-ray]

monaco.languages.setLanguageConfiguration("myLang", {
    wordPattern: /[a-zA-Z]+/
});

Perfect, thank you~