[EuiCollapsibleNav] document is not defined when using CollapsibleNav

[Paku580]

I tried to add a EuiCollapsibleNav to your nextjs eui example here https://elastic.github.io/next-eui-starter/. This worked until i decided to restart the server. Then i got this weird error "document is not defined".

StackTrace:

ReferenceError: document is not defined
    at EuiOverlayMask (webpack-internal:///./node_modules/@elastic/eui/es/components/overlay_mask/overlay_mask.js:64:78)
    at processChild (.../next-eui-starter/node_modules/react-dom/cjs/react-dom-server.node.development.js:3353:14)
    at resolve (.../next-eui-starter/node_modules/react-dom/cjs/react-dom-server.node.development.js:3270:5)
    at ReactDOMServerRenderer.render (.../next-eui-starter/node_modules/react-dom/cjs/react-dom-server.node.development.js:3753:22)
    at ReactDOMServerRenderer.read (.../next-eui-starter/node_modules/react-dom/cjs/react-dom-server.node.development.js:3690:29)
    at renderToString (.../next-eui-starter/node_modules/react-dom/cjs/react-dom-server.node.development.js:4298:27)
    at Object.renderPage (.../next-eui-starter/node_modules/next/dist/next-server/server/render.js:54:854)
    at Function.getInitialProps (webpack-internal:///./node_modules/next/dist/pages/_document.js:141:19)
    at loadGetInitialProps (.../next-eui-starter/node_modules/next/dist/next-server/lib/utils.js:5:101)
    at renderToHTML (.../next-eui-starter/node_modules/next/dist/next-server/server/render.js:54:1145)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at async .../next-eui-starter/node_modules/next/dist/next-server/server/next-server.js:112:97
    at async .../next-eui-starter/node_modules/next/dist/next-server/server/next-server.js:105:142
    at async DevServer.renderToHTMLWithComponents (.../next-eui-starter/node_modules/next/dist/next-server/server/next-server.js:137:387)
    at async DevServer.renderToHTML (.../next-eui-starter/node_modules/next/dist/next-server/server/next-server.js:138:522)

I then found out that this starter example doesn't use babel/polyfill so I thought this might be causing the problem.
So I added babel and the .babelrc file at the root of the project with following configuration:

{
  "comments": true,
  "presets": [
    ["@babel/env", {
      "useBuiltIns": "usage",
      "corejs": 3,
      "modules": "commonjs"
    }],
    ["@babel/typescript", { "isTSX": true, "allExtensions": true }],
    "@babel/react"
  ],
  "plugins": [
    "@babel/plugin-syntax-dynamic-import",
    "pegjs-inline-precompile",
    "add-module-exports",
    "@babel/proposal-object-rest-spread",
    "@babel/proposal-class-properties"
  ]
}

This is the code i modified in the _app.tsx while trying to add the CollapsibleNav:

import { AppProps } from 'next/app';
import React, { FunctionComponent, useState } from 'react';
import {
  EuiCollapsibleNav,
  EuiCollapsibleNavGroup,
  EuiFlexGroup,
  EuiFlexItem,
  EuiHeader,
  EuiHeaderLogo,
  EuiHeaderSectionItemButton,
  EuiIcon,
  EuiListGroup,
  EuiPage,
} from '@elastic/eui';

import './app.scss';

import { EuiListGroupItemProps } from '@elastic/eui/src/components/list_group/list_group_item';

const EuiApp: FunctionComponent<AppProps> = ({ Component, pageProps }) => {
  const [navIsopen, setNavIsOpen] = useState(true);
  const LearnLinks: EuiListGroupItemProps[] = [
    { label: 'Docs', href: '#/navigation/collapsible-nav' },
    { label: 'Blogs', href: '#/navigation/collapsible-nav' },
    { label: 'Webinars', href: '#/navigation/collapsible-nav' },
    { label: 'Elastic.co', href: 'https://elastic.co' },
  ];
  const collapsibleNav = (
    <EuiCollapsibleNav
      isOpen={navIsopen}
      isDocked={false}
      showButtonIfDocked={true}
      button={
        <EuiHeaderSectionItemButton onClick={() => setNavIsOpen(!navIsopen)}>
          <EuiIcon type={'menu'} size="m" aria-hidden="true" />
        </EuiHeaderSectionItemButton>
      }
      onClose={() => setNavIsOpen(false)}>
      <EuiFlexItem className="eui-yScroll">
        <EuiCollapsibleNavGroup
          title="Learn"
          iconType="training"
          isCollapsible={true}
          initialIsOpen={false}>
          <EuiListGroup aria-label="Learn" listItems={LearnLinks} />
        </EuiCollapsibleNavGroup>
      </EuiFlexItem>
    </EuiCollapsibleNav>
  );
  const leftSectionItems = [
    collapsibleNav,
    // eslint-disable-next-line react/jsx-key
    <EuiHeaderLogo iconType="logoElastic">Elastic</EuiHeaderLogo>,
  ];
  return (
    <>
      <EuiFlexGroup gutterSize="none" direction="column">
        <EuiHeader
          position="fixed"
          sections={[
            {
              items: leftSectionItems,
              borders: 'right',
            },
          ]}
        />
        <EuiPage />
      </EuiFlexGroup>
    </>
  );
};

export default EuiApp;

I tried several things to solve this none of it worked yet.
Since the starter example uses an older version I tried upgrading it but that didn't solve it either.

I am out of ideas and don't know if this is an actual issue in elastic ui or I am just missing any specific configuration.
Following this doc https://elastic.github.io/eui/#/layout/header#the-elastic-navigation-pattern the code seems right so I guess I am missing some configuration but couldn't find anything about it.

[elizabetdev]

Hi @Paku580,

It seems that EuiOverlayMask is not supported in server-side rendering. I'm not 100% familiar with next-js so it's better to open an issue here: https://github.com/elastic/next-eui-starter/issues.

But I tested your code and this code seems to make it work:

const [_document, set_document] = React.useState(null)

React.useEffect(() => {
    set_document(document)
}, [])

I found the solution here: https://stackoverflow.com/questions/60629258/next-js-document-is-not-defined. And I don't actually know if it's a good idea or not. 🤷🏽

[thompsongl]

Full support for server-side rendering isn't something we kept top-of-mind, but it is something we'd like to work towards.
The right approach would be to update EuiCollapsibleNav to check for the existence of document before executing the effect.

[Patil2099]

@miukimiu I would love to work on this issue. Can you guide me in solving this issue?

[jeepers3327]

How about this one. Check first is component is mounted before rendering the whole app.

const EuiApp: FunctionComponent<AppProps> = ({ Component, pageProps }) => {
  const [isMounted, setIsMounted] = useState(false);
  const [navIsopen, setNavIsOpen] = useState(true);
  
  useEffect(() => {
    
    setIsMounted(true);
    
    return () =>  {
       setIsMounted(false);
    }
  
  }, []);
  
  const LearnLinks: EuiListGroupItemProps[] = [
    { label: 'Docs', href: '#/navigation/collapsible-nav' },
    { label: 'Blogs', href: '#/navigation/collapsible-nav' },
    { label: 'Webinars', href: '#/navigation/collapsible-nav' },
    { label: 'Elastic.co', href: 'https://elastic.co' },
  ];
  const collapsibleNav = (
    <EuiCollapsibleNav
      isOpen={navIsopen}
      isDocked={false}
      showButtonIfDocked={true}
      button={
        <EuiHeaderSectionItemButton onClick={() => setNavIsOpen(!navIsopen)}>
          <EuiIcon type={'menu'} size="m" aria-hidden="true" />
        </EuiHeaderSectionItemButton>
      }
      onClose={() => setNavIsOpen(false)}>
      <EuiFlexItem className="eui-yScroll">
        <EuiCollapsibleNavGroup
          title="Learn"
          iconType="training"
          isCollapsible={true}
          initialIsOpen={false}>
          <EuiListGroup aria-label="Learn" listItems={LearnLinks} />
        </EuiCollapsibleNavGroup>
      </EuiFlexItem>
    </EuiCollapsibleNav>
  );
  const leftSectionItems = [
    collapsibleNav,
    // eslint-disable-next-line react/jsx-key
    <EuiHeaderLogo iconType="logoElastic">Elastic</EuiHeaderLogo>,
  ];
  
  if (!isMounted) return null;
  
  return (
    <>
      <EuiFlexGroup gutterSize="none" direction="column">
        <EuiHeader
          position="fixed"
          sections={[
            {
              items: leftSectionItems,
              borders: 'right',
            },
          ]}
        />
        <EuiPage />
      </EuiFlexGroup>
    </>
  );
};

[github-actions]

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[b0r1sp]

Hi, any volunteers here to fix that nasty thing? In my case that issue popped up, when using next + flyout + property push - e.g.:

return (
      <>
          <EuiFlyout
            type="push"
            onClose={() => {}}
          >
          ...
          </EuiFlyout>
      </>
);

Quick fix:

if (typeof document !== 'undefined') {
  return (
    <>
        <EuiFlyout
          type="push"
          onClose={() => {}}
        >
        ...
        </EuiFlyout>
    </>
  ) else {
    return null;
};

FRom reading the source the fix would be to prevent calling document in EuiOverlayMask during ssr. From my understanding that should actually fix similar issues with EuiCollapsibleNav, EuiModal,...