FAQ

Frequently Asked Questions

I imported the menu but the burger icon isn't showing and the menu opens when I click anywhere.

You most likely need to add styles. The burger icon is there, but invisible, and taking up the entire screen because it defaults to 100% width/height and you haven't given it a size/background color yet.

From the docs on styling:

All the animations are handled internally by the component. However, the visual styles (colors, fonts etc.) are not, and need to be supplied, either with CSS or with a JavaScript object passed as the styles prop.

Can I change the transition property of the menu?

Yes, but it's not recommended for animations other than Slide due to how other page elements are designed to move with the transition.

You can access it through the bmMenuWrap key of the styles prop:

var styles = {
  bmMenuWrap: {
    transition: ''
  }
}

<Menu styles={ styles } />

I have a fixed header, but it's scrolling with the rest of the page when I open the menu.

Unlike the rest of your content, fixed elements need to be placed outside your page-wrap element, so your layout structure will look something like this:

<div id="outer-container">
  <header>I am a fixed header!</header>
  <Menu pageWrapId={ "page-wrap" } outerContainerId={ "outer-container" } />
  <main id="page-wrap">
    .
    .
    .
  </main>
</div>

A common use for this is a fixed header, but the same applies to any elements you want to remain fixed and positioned relative to the viewport.

This package is making my Webpack bundle huge due to snapsvg-cjs.

If you're not using one of the animations that needs Snap.svg (Elastic or Bubble), then you can import the menu like this:

import Menu from 'react-burger-menu/lib/menus/slide'

This will keep Snap.svg out of your bundle.

I want to control the open state programmatically but I don't understand how to use the isOpen prop.

First, you need to store the menu state somewhere outside the component (the simplest place would be in a parent component's state, so I'll use that to demonstrate). Now you have control of that state (i.e. the menu is a 'controlled component'), you can set it to whatever you want via other actions (e.g. a click on a menu item or a custom burger icon). Then all you have to do is pass that state down (via the isOpen prop), and the menu will open/close according to the state you pass.

The code would look something like this:

class ParentComponent extends React.Component {
  constructor (props) {
    super(props)
    this.state = {
      menuOpen: false
    }
  }

  // This keeps your state in sync with the opening/closing of the menu
  // via the default means, e.g. clicking the X, pressing the ESC key etc.
  handleStateChange (state) {
    this.setState({menuOpen: state.isOpen})  
  }
  
  // This can be used to close the menu, e.g. when a user clicks a menu item
  closeMenu () {
    this.setState({menuOpen: false})
  }

  // This can be used to toggle the menu, e.g. when using a custom icon
  // Tip: You probably want to hide either/both default icons if using a custom icon
  // See https://github.com/negomi/react-burger-menu#custom-icons
  toggleMenu () {
    this.setState({menuOpen: !this.state.menuOpen})
  }

  render () {
    return (
      <div>
        <Menu isOpen={this.state.menuOpen} onStateChange={(state) => this.handleStateChange(state)}>
          <a onClick={() => this.closeMenu()}>Home</a>
          <a onClick={() => this.closeMenu()}>About</a>
          <a onClick={() => this.closeMenu()}>Contact</a>
          <a onClick={() => this.closeMenu()}>Settings</a>
        </Menu>
        <CustomIcon onClick={() => this.toggleMenu()} />
      </div>
    )
  }
}