However, this isn't the only time you might run into this error. Here are the various ways you might run into it:
- You try to use the
requirestatement in the browser
- You try to use
requirein Node when ES modules are specified in
- You're trying to use
requirein a file ending in
.mjs, which typically specifies ES modules
If you encounter this error in a Node environment, you've likely either specified to use ES modules via
package.json or via the command line.
In case it is specified in
package.json, you can fix this by removing the following line in the file:
If you specified to use ES modules via the command line with
--eval, you can fix this by removing the
--input-type parameter from the command line call.
require method is not available in the browser. To solve this, you have a few options, a few of which we'll briefly describe here.
require statement and instead merge the code into a single file. In some cases, some bundlers may even convert your
require calls to
import since that is supported by most browsers.
Another option is to just use ES modules, which is natively supported by most browsers. In order to use this, you'll need to convert all of your
require statements to
import statements. You'll also need to explicitly specify the type of the module in the
<script> tag, like this:
<script type="module" src="./app.js"></script>
How you choose to fix this may depend on personal preference, if you're using a bundler, etc.