all only js extension when allow js

Author: wclr

lib/child-require-hook.js

@@ -2,6 +2,7 @@ var fs = require('fs')
 var getCompiledPath = require('./get-compiled-path')
 var sep = require('path').sep
 var join = require('path').join
+var extname = require('path').extname
 var execSync = require('child_process').execSync
 var Module = require("module")
 var compilationId
@@ -88,7 +89,8 @@ function registerJsExtension() {
         ignore.reduce(function(res, ignore) {
           return res || ignore.test(fileName)
         }, false)
-      if (tsCode !== undefined || (allowJs && !isIgnored)) {
+      var ext = extname(fileName)
+      if (tsCode !== undefined || (allowJs && !isIgnored && ext == '.js')) {
         m._compile = function(code, fileName) {
           if (tsCode !== undefined) {
             code = tsCode