Remove dom-helpers, add lib/canUseDom (#1066)

Remove an unneeded dependency on dom-helpers and simply add a local replacement
for determining that we can use the dom (or essentially that we are in a
browser).

package.json

@@ -58,7 +58,6 @@
  "@types/react-transition-group": "^4.4.0",
  "arrify": "^1.0.1",
  "classnames": "^2.2.6",
- "dom-helpers": "^3.2.1",
  "downshift": "^5.2.0",
  "fuzzaldrin-plus": "^0.6.0",
  "glamor": "^2.20.40",

src/lib/canUseDom.js

@@ -0,0 +1 @@
+export default Boolean(typeof window !== 'undefined' && window.document)

src/portal/src/Portal.js

@@ -1,7 +1,7 @@
 import { Component } from 'react'
-import canUseDom from 'dom-helpers/util/inDOM'
 import ReactDOM from 'react-dom'
 import PropTypes from 'prop-types'
+import canUseDom from '../../lib/canUseDom'
 
 let portalContainer
 

src/ssr/src/autoHydrate.js

@@ -1,5 +1,6 @@
 import { hydrate as boxHydrate } from 'ui-box'
 import { rehydrate } from 'glamor'
+import canUseDom from '../../lib/canUseDom'
 
 /**
  * You shouldn't have to manually run this.
@@ -16,7 +17,7 @@ export function hydrate(hydration) {
 }
 
 export default function autoHydrate() {
- if (typeof window !== 'undefined' && typeof document !== 'undefined') {
+ if (canUseDom) {
  const hydration = document.querySelector('#evergreen-hydrate')
 
  if (hydration) {

src/toaster/src/Toaster.js

@@ -1,17 +1,15 @@
 import React from 'react'
 import ReactDOM from 'react-dom'
+import canUseDom from '../../lib/canUseDom'
 import ToastManager from './ToastManager'
 
-const isBrowser =
- typeof window !== 'undefined' && typeof window.document !== 'undefined'
-
 /**
  * The Toaster manages the interactions between
  * the ToasterManger and the toast API.
  */
 export default class Toaster {
  constructor() {
- if (!isBrowser) return
+ if (!canUseDom) return
 
  const container = document.createElement('div')
  container.setAttribute('data-evergreen-toaster-container', '')

yarn.lock

@@ -4734,13 +4734,6 @@ dom-converter@^0.2:
  dependencies:
  utila "~0.4"
 
-dom-helpers@^3.2.1:
- version "3.4.0"
- resolved "https://registry.yarnpkg.com/dom-helpers/-/dom-helpers-3.4.0.tgz#e9b369700f959f62ecde5a6babde4bccd9169af8"
- integrity sha512-LnuPJ+dwqKDIyotW1VzmOZ5TONUN7CwkCR5hrgawTUbkBGYdeoNLZo6nNfGkCrjtE1nXXaj7iMMpDa8/d9WoIA==
- dependencies:
- "@babel/runtime" "^7.1.2"
-
 dom-helpers@^5.0.1:
  version "5.1.4"
  resolved "https://registry.yarnpkg.com/dom-helpers/-/dom-helpers-5.1.4.tgz#4609680ab5c79a45f2531441f1949b79d6587f4b"