IIS Node does not like .mjs I think ?

[DerekAlanGilbert]

I am having some issues getting my app to run with nuxt bridge on IIS node.

It errors out with something like this

Application has thrown an uncaught exception and is terminated:Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: D:\home\site\wwwroot\server\index.mjsat Module.load (internal/modules/cjs/loader.js:926:11)at Function.Module._load (internal/modules/cjs/loader.js:769:14)
at Module.require (internal/modules/cjs/loader.js:952:19)at require (internal/modules/cjs/helpers.js:88:18)at Object.<anonymous> (D:\Program Files (x86)\iisnode\interceptor.js:459:1)at Module._compile (internal/modules/cjs/loader.js:1063:30)at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)at Module.load (internal/modules/cjs/loader.js:928:32)at Function.Module._load (internal/modules/cjs/loader.js:769:14)at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)

This is my apps contents once we deploy it to our staging slot.

wwwroot/
   public/
   server/

My web config file

<?xml version="1.0" encoding="utf-8"?>
<!--
     This configuration file is required if iisnode is used to run node processes behind
     IIS or IIS Express.  For more information, visit:

     https://github.com/tjanczuk/iisnode/blob/master/src/samples/configuration/web.config
-->

<configuration>
  <system.webServer>
    <!-- Visit https://azure.microsoft.com/en-us/blog/introduction-to-websockets-on-windows-azure-web-sites/ for more information on WebSocket support -->
    <webSocket enabled="false" />
    <handlers>
      <!-- Indicates that the server.js file is a node.js site to be handled by the iisnode module -->
      <add name="iisnode" path="server" verb="*" modules="iisnode"/>
    </handlers>
    <rewrite>
      <rules>
        <!-- Do not interfere with requests for node-inspector debugging -->
        <rule name="NodeInspector" patternSyntax="ECMAScript" stopProcessing="true">
          <match url="^server\/debug[\/]?" />
        </rule>

        <!-- First we consider whether the incoming URL matches a physical file in the /public folder -->
        <rule name="StaticContent">
          <action type="Rewrite" url="public{REQUEST_URI}"/>
        </rule>

        <!-- All other URLs are mapped to the node.js site entry point -->
        <rule name="DynamicContent">
          <conditions>
            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="True"/>
          </conditions>
          <action type="Rewrite" url="server"/>
        </rule>
      </rules>
    </rewrite>

    <!-- 'bin' directory has no special meaning in node.js and apps can be placed in it -->
    <security>
      <requestFiltering>
        <hiddenSegments>
          <remove segment="bin"/>
        </hiddenSegments>
      </requestFiltering>
    </security>

    <!-- Make sure error responses are left untouched -->
    <httpErrors existingResponse="PassThrough" />

    <!--
      You can control how Node is hosted within IIS using the following options:
        * watchedFiles: semi-colon separated list of files that will be watched for changes to restart the server
        * node_env: will be propagated to node as NODE_ENV environment variable
        * debuggingEnabled - controls whether the built-in debugger is enabled

      See https://github.com/tjanczuk/iisnode/blob/master/src/samples/configuration/web.config for a full list of options
    -->
    <iisnode watchedFiles="web.config;*.js" node_env="production" loggingEnabled="true" />

  </system.webServer>
</configuration>

Any ideas as to what I can do?

[Jozaguts]

can you solve this?

[Abhayprince]

Were you able to fix it? I am getting the same error, could not find any solution

[bayasdev]

Same problem 🥲