Notes/src/public/app/widgets/floating_buttons/help_button.ts

import appContext from "../../components/app_context.js";
import type { NoteType } from "../../entities/fnote.js";
import { t } from "../../services/i18n.js";
import NoteContextAwareWidget from "../note_context_aware_widget.js";

const TPL = `
<button class="open-contextual-help-button" title="${t("help-button.title")}">
    <span class="bx bx-help-circle"></span>
</button>
`;

const byNoteType: Record<NoteType, string | null> = {
    book: null,
    canvas: null,
    code: null,
    contentWidget: null,
    doc: null,
    file: null,
    geoMap: "foPEtsL51pD2",
    image: null,
    launcher: null,
    mermaid: null,
    mindMap: null,
    noteMap: null,
    relationMap: null,
    render: null,
    search: null,
    text: null,
    webView: null
};

export default class ContextualHelpButton extends NoteContextAwareWidget {

    private helpNoteIdToOpen?: string | null;

    isEnabled() {
        this.helpNoteIdToOpen = null;

        if (!super.isEnabled()) {
            return false;
        }

        if (this.note && byNoteType[this.note.type]) {
            this.helpNoteIdToOpen = byNoteType[this.note.type];
        }

        return !!this.helpNoteIdToOpen;
    }

    doRender() {
        this.$widget = $(TPL);
        this.$widget.on("click", () => {
            const subContexts = appContext.tabManager.getActiveContext().getSubContexts();
            const { ntxId } = subContexts[subContexts.length - 1];
            this.triggerCommand("openNewNoteSplit", {
                ntxId,
                notePath: `_help_${this.helpNoteIdToOpen}`,
                hoistedNoteId: "_help",
                viewScope: {
                    viewMode: "contextual-help"
                }
            })
        });
    }

}