Port fix from PR#11268

Kanchalai Tanglertsampan · Kanchalai Tanglertsampan · commit 5ce22801a715 · 2016-10-10T11:11:06.000-07:00
diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
@@ -324,7 +324,7 @@ namespace ts.NavigationBar {
     }
 
     // More efficient to create a collator once and use its `compare` than to call `a.localeCompare(b)` many times.
-    const collator: { compare(a: string, b: string): number } = typeof Intl === "undefined" ? undefined : new Intl.Collator();
+    const collator: { compare(a: string, b: string): number } = typeof Intl === "object" && typeof Intl.Collator === "function" ? new Intl.Collator() : undefined;
     // Intl is missing in Safari, and node 0.10 treats "a" as greater than "B".
     const localeCompareIsCorrect = collator && collator.compare("a", "B") < 0;
     const localeCompareFix: (a: string, b: string) => number = localeCompareIsCorrect ? collator.compare : function(a, b) {

Original file line number	Diff line number	Diff line change
`@@ -324,7 +324,7 @@ namespace ts.NavigationBar {`
`324`	`324`	`}`
`325`	`325`
`326`	`326`	// More efficient to create a collator once and use its `compare` than to call `a.localeCompare(b)` many times.
`327`		`- const collator: { compare(a: string, b: string): number } = typeof Intl === "undefined" ? undefined : new Intl.Collator();`
	`327`	`+ const collator: { compare(a: string, b: string): number } = typeof Intl === "object" && typeof Intl.Collator === "function" ? new Intl.Collator() : undefined;`
`328`	`328`	`// Intl is missing in Safari, and node 0.10 treats "a" as greater than "B".`
`329`	`329`	`const localeCompareIsCorrect = collator && collator.compare("a", "B") < 0;`
`330`	`330`	`const localeCompareFix: (a: string, b: string) => number = localeCompareIsCorrect ? collator.compare : function(a, b) {`