react-useportal

usePortal

🌀 React hook for using Portals

Need to make dropdowns, lightboxes/modals/dialogs, global message notifications, or tooltips in React? React Portals provide a first-class way to render children into a DOM node that exists outside the DOM hierarchy of the parent component (react docs).

This hook is also isomorphic, meaning it works with SSR (server side rendering).

Features

• SSR (server side rendering) support
• TypeScript support
• 1 dependency (use-ssr)
• Built in state

Examples

• SSR Example - Next.js - codesandbox container (sometimes buggy, if so try this example)
• Modal Example (useModal) - create-react-app
• Dropdown Example (useDropdown) - Next.js
• Tooltip Example (useTooltip) - Next.js

Installation

yarn add react-useportal      or     npm i -S react-useportal

Usage

Stateless

import usePortal from 'react-useportal'

const App = () => {
  const { Portal } = usePortal()

  return (
    <Portal>
      This text is portaled at the end of document.body!
    </Portal>
  )
}

const App = () => {
  const { Portal } = usePortal({
    bindTo: document && document.getElementById('san-francisco')
  })

  return (
    <Portal>
      This text is portaled into San Francisco!
    </Portal>
  )
}

With State

import usePortal from 'react-useportal'

const App = () => {
  var { openPortal, closePortal, isOpen, Portal } = usePortal()

  // want to use array destructuring? You can do that too
  var [openPortal, closePortal, isOpen, Portal] = usePortal()

  return (
    <>
      <button onClick={openPortal}>
        Open Portal
      </button>
      {isOpen && (
        <Portal>
          <p>
            This Portal handles its own state.{' '}
            <button onClick={closePortal}>Close me!</button>, hit ESC or
            click outside of me.
          </p>
        </Portal>
      )}
    </>
  )
}

Need Animations?

import usePortal from 'react-useportal'

const App = () => {
  const { openPortal, closePortal, isOpen, Portal } = usePortal()
  return (
    <>
      <button onClick={openPortal}>
        Open Portal
      </button>
      <Portal>
        <p className={isOpen ? 'animateIn' : 'animateOut'}>
          This Portal handles its own state.{' '}
          <button onClick={closePortal}>Close me!</button>, hit ESC or
          click outside of me.
        </p>
      </Portal>
    </>
  )
}

Customizing the Portal directly

By using onOpen, onClose or any other event handler, you can modify the Portal and return it. See useDropdown for a working example. It's important that you pass the event object to openPortal and togglePortal otherwise you will need to attach a ref to the clicked element.

const useModal = () => {
  const { isOpen, togglePortal, closePortal, Portal } = usePortal({
    onOpen({ portal }) {
      portal.current.style.cssText = `
        /* add your css here for the Portal */
        position: fixed;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);
        z-index: 1000;
      `
    }
  })

  return {
    Modal: Portal,
    toggleModal: togglePortal,
    closeModal: closePortal,
    isOpen
  }
}

const App = () => {
  const { openModal, closeModal, isOpen, Modal } = useModal()
  
  return <>
    <button onClick={e => openModal(e)}>Open Modal<button>
    {isOpen && (
      <Modal>
        This will dynamically center to the middle of the screen regardless of the size of what you put in here
      </Modal>
    )}
  </>
}

Make sure you are passing the html synthetic event to the openPortal and togglePortal . i.e. onClick={e => openPortal(e)}

Usage with a ref

If for some reason, you don't want to pass around the event to openPortal or togglePortal, you can use a ref like this.

import usePortal from 'react-useportal'

const App = () => {
  var { ref, openPortal, closePortal, isOpen, Portal } = usePortal()

  return (
    <>
      {/* see below how I don't have to pass the event if I use the ref */}
      <button ref={ref} onClick={() => openPortal()}>
        Open Portal
      </button>
      {isOpen && (
        <Portal>
          <p>
            This Portal handles its own state.{' '}
            <button onClick={closePortal}>Close me!</button>, hit ESC or
            click outside of me.
          </p>
        </Portal>
      )}
    </>
  )
}

Options

Option	Description
closeOnOutsideClick	This will close the portal when not clicking within the portal. Default is true
closeOnEsc	This will allow you to hit ESC and it will close the modal. Default is true
bindTo	This is the DOM node you want to attach the portal to. By default it attaches to document.body
isOpen	This will be the default for the portal. Default is false
onOpen	This is used to call something when the portal is opened and to modify the css of the portal directly
onClose	This is used to call something when the portal is closed and to modify the css of the portal directly
onPortalClick	This is fired whenever clicking on the Portal
html event handlers (i.e. onClick)	These can be used instead of onOpen to modify the css of the portal directly. onMouseEnter and onMouseLeave example

Option Usage

const {
  openPortal,
  closePortal,
  togglePortal,
  isOpen,
  Portal,
  ref, // if you don't pass an event to openPortal, closePortal, or togglePortal, you will need to put this on the element you want to interact with/click
} = usePortal({
  closeOnOutsideClick: true,
  closeOnEsc: true,
  bindTo, // attach the portal to this node in the DOM
  isOpen: false,
  // `event` has all the fields that a normal `event` would have such as `event.target.value`, etc.
  // with the additional `portal` and `targetEl` added to it as seen in the examples below
  onOpen: (event) => {
    // can access: event.portal, event.targetEl, event.event, event.target, etc.
  },
  // `onClose` will not have an `event` unless you pass an `event` to `closePortal`
  onClose({ portal, targetEl, event }) {},
  // `targetEl` is the element that you either are attaching a `ref` to
  // or that you are putting `openPortal` or `togglePortal` or `closePortal` on
  onPortalClick({ portal, targetEl, event }) {},
  // in addition, any event handler such as onClick, onMouseOver, etc will be handled the same
  onClick({ portal, targetEl, event }) {}
})

Todos

• maybe disable scrolling outside of the portal when it is open?
• React Native support. 1 2 3 4 5 Probably going to have to add a Provider...
• add correct return types
• add a Provider for useModal. Potential syntax ideas

  const App = (
    <Provider background='rgba(0, 0, 0, 0.75)' animation=''><Root /></Provider>
  )
  

• add support for popup windows resource 1 resource 2. Maybe something like

  const { openPortal, closePortal, isOpen, Portal } = usePortal({
    popup: ['', '', 'width=600,height=400,left=200,top=200']
  })
  // window.open('', '', 'width=600,height=400,left=200,top=200')

• tests (priority)
• maybe have a <Provider order={['Portal', 'openPortal']} /> then you can change the order of the array destructuring syntax
• fix code so maintainability is A
• set up code climate test coverage
• optimize badges see awesome badge list
  • add code climate test coverage badge
• add example to docs with using a ref instead of the event in openPortal, etc.