chore: fix type

znck · znck · commit 806a4a783339 · 2019-06-14T12:57:48.000+05:30
diff --git a/src/inject-style/browser.ts b/src/inject-style/browser.ts
@@ -21,7 +21,7 @@ export interface StyleElementContent {
   element?: HTMLStyleElement
 }
 
-const HEAD?: HTMLElement = undefined
+let HEAD: HTMLElement | undefined
 const styles: { [key: string]: StyleElementContent } = {}
 function addStyle(id: string, css: StyleSource) {
   const group = isOldIE ? css.media || 'default' : id

Original file line number	Diff line number	Diff line change
`@@ -21,7 +21,7 @@ export interface StyleElementContent {`
`21`	`21`	`element?: HTMLStyleElement`
`22`	`22`	`}`
`23`	`23`
`24`		`-const HEAD?: HTMLElement = undefined`
	`24`	`+let HEAD: HTMLElement \| undefined`
`25`	`25`	`const styles: { [key: string]: StyleElementContent } = {}`
`26`	`26`	`function addStyle(id: string, css: StyleSource) {`
`27`	`27`	`const group = isOldIE ? css.media \|\| 'default' : id`