Customizing RMenu: Themes, Accessibility, and Performance

How to Implement RMenu in React — Step-by-Step

1. Install RMenu

1. Open a terminal in your project directory.
2. Install via npm or yarn:

bash
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npm install rmenu # or
yarn add rmenu 

2. Import and basic setup

1. In the component where you want the menu, import RMenu and its styles:

jsx
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import React from “react”;
import { RMenu, RMenuItem } from “rmenu”;
import “rmenu/dist/rmenu.css”;

2. Render a simple menu:

jsx
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function MyMenu() {
return (
    <RMenu>
      <RMenuItem onSelect={() => console.log(“New”)}>New</RMenuItem>
      <RMenuItem onSelect={() => console.log(“Open”)}>Open</RMenuItem>
      <RMenuItem onSelect={() => console.log(“Save”)}>Save</RMenuItem>
    </RMenu>
  );
}

3. Positioning and triggers

• Use props to control trigger and position. Example with a button trigger:

jsx
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<RMenu trigger={<button>Open menu</button>} position=“bottom-start”>
  … </RMenu>

• Common positions: “top”, “bottom”, “left”, “right”, with “-start”/“-end” variants.

4. Keyboard accessibility

• Ensure RMenu supports keyboard navigation out of the box (Arrow keys, Enter, Esc).
• Add focus management by giving the trigger a discernible label and using aria attributes:

jsx
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<RMenu trigger={<button aria-haspopup=“menu” aria-label=“Options”>Options</button>}>
  … </RMenu>

5. Nested menus and groups

• Create submenus by nesting RMenu inside RMenuItem or using provided SubMenu component:

jsx
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<RMenu>
  <RMenuItem>Simple</RMenuItem>
  <RMenuItem>
    More     <RMenu position=“right”>
      <RMenuItem>Sub 1</RMenuItem>
      <RMenuItem>Sub 2</RMenuItem>
    </RMenu>
  </RMenuItem>
</RMenu>

6. Disabled items and dividers

jsx
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<RMenu>
  <RMenuItem disabled>Disabled action</RMenuItem>
  <RMenuItemDivider />
  <RMenuItem>Regular action</RMenuItem>
</RMenu>

7. Theming and custom styles

• Override CSS variables or provide className to RMenu for custom themes:

css
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/* override in your stylesheet */
.rmenu { –rmenu-bg: #111; –rmenu-color: #fff; }

jsx
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<RMenu className=“custom-rmenu”>…</RMenu>

8. Handling events and state

• Use callbacks to handle selection and close events:

jsx
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<RMenu onSelect={(value) => setSelected(value)} onClose={() => setOpen(false)}>
  <RMenuItem value=“save”>Save</RMenuItem>
</RMenu>

9. Performance tips

• Lazy-load large submenu content.
• Memoize menu items with React.memo when rendering many items.
• Keep item render simple; avoid heavy components inside menu items.

10. Example: full component

”`jsx import React, { useState } from “react”; import { RMenu, RMenuItem } from “r