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Change to getScriptKindFromFileName to avoid unnecessary array allocation in split

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Jason Ramsay
2016-02-19 14:20:32 -08:00
parent da6059871f
commit bdc9788ec8
1 changed files with 5 additions and 5 deletions
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10
src/compiler/parser.ts
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@@ -409,15 +409,15 @@ namespace ts {
/* @internal */
export function getScriptKindFromFileName(fileName: string): ScriptKind {
const ext = fileName.split(".").pop();
const ext = fileName.substr(fileName.lastIndexOf("."));
switch (ext.toLowerCase()) {
case "js":
case ".js":
return ScriptKind.JS;
case "jsx":
case ".jsx":
return ScriptKind.JSX;
case "ts":
case ".ts":
return ScriptKind.TS;
case "tsx":
case ".tsx":
return ScriptKind.TSX;
default:
return ScriptKind.TS;