refactor(cdk/a11y): remove InteractivityChecker ie11 special case (#23267)

jelbourn · web-flow · commit b714dec3f553 · 2021-07-30T14:19:36.000-07:00
As of v13, we no longer support IE11. Related to #7374
diff --git a/src/cdk/a11y/interactivity-checker/interactivity-checker.ts b/src/cdk/a11y/interactivity-checker/interactivity-checker.ts
@@ -208,12 +208,6 @@ function hasValidTabIndex(element: HTMLElement): boolean {
   }
 
   let tabIndex = element.getAttribute('tabindex');
-
-  // IE11 parses tabindex="" as the value "-32768"
-  if (tabIndex == '-32768') {
-    return false;
-  }
-
   return !!(tabIndex && !isNaN(parseInt(tabIndex, 10)));
 }
 

Original file line number	Diff line number	Diff line change
`@@ -208,12 +208,6 @@ function hasValidTabIndex(element: HTMLElement): boolean {`
`208`	`208`	`}`
`209`	`209`
`210`	`210`	`let tabIndex = element.getAttribute('tabindex');`
`211`		`-`
`212`		`- // IE11 parses tabindex="" as the value "-32768"`
`213`		`- if (tabIndex == '-32768') {`
`214`		`- return false;`
`215`		`- }`
`216`		`-`
`217`	`211`	`return !!(tabIndex && !isNaN(parseInt(tabIndex, 10)));`
`218`	`212`	`}`
`219`	`213`