Report

Intercept HTTP Requests with Node.js nock

Fixed Node.js 22 · checked 17 Oct 2026 · model cost $0.026

After applying the fix, the tutorial works again; the original code failed with a TypeError because nock 15.0.1 changed its export to an ES module, making the imported value an object rather than a function. The repair accesses the default export (or adjusts the import) to restore the expected function, resolving the error.

When it broke

Broke in nock 15.0.1, released 6 Oct 2026. nock 15.0.0 still runs this step, and 15.0.1 fails the same way. The tutorial was published in Aug 2015, so it worked for about 134 months.

1 change to make it work today

Write nock demo script

s3 · write_file migrate

Change the import to use the default export, which is the typical fix when a CommonJS require returns a module object instead of the function.

@@ -1,3 +1,3 @@

-var nock = require('nock');

+const nock = require('nock').default;

nock('https://davidwalsh.name')

@@ -37,6 +37,6 @@

.reply(function() {

- // Some logic

+// Some logic

- return [200, resultingContent];

+return [200, resultingContent];

});

Sources

Fix the 'is not a function' error in JavaScriptCommon causes are a library that did not load, an import that returned a module object instead of its function, or another script that replaced `$`. Fix how that value is loaded or referenced rather than hiding the error with a type check.

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Send them what broke and the fix, so the next reader doesn't hit the same error.

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