How Do You Solve This Error “Babel ReferenceError: Regeneratorruntime Is Not Defined”?

When attempting to use my async-await feature, you suddenly get this notification that says, “Babel ReferenceError: regeneratorRuntime is not defined“. 

This is one of the common mistakes that any programmer will encounter. So why does it appear, and how to solve it? We will explain it to you.

Why Does “Babel ReferenceError: Regeneratorruntime Is Not Defined” Occur?

The above async/await function is used when there are not necessary Babel plugins. This error may happen. The second scenario is when you’re using your npm command to run an application.

How to fix This Error “Babel ReferenceError: Regeneratorruntime Is Not Defined”

Three Basic Techniques.

And guess what, we just used the following three ways to solve it.

Solution 1

In this first way, we will use the appropriate plugin.

To assist async/await, we would need babel-plugin-transform-runtime. This also involves async/await assistance and other ES 6 built-ins. You must also include your runtime plugin for .babelrc.

Solution 2

This command will install babel-polyfill. 

npm i -D babel-core babel-polyfill babel-preset-es2015 babel-preset-stage-0 babel-loader

This is required to obtain the desired function. Here’s an example.

Solution 3

Install the following two dependencies if you are a Babel 7 user:

npm install --save @babel/runtime 
npm install --save-dev @babel/plugin-transform-runtime

And don’t forget to add this in your .babelrc.


The solutions mentioned above are the fastest options for those still confused with this error “Babel ReferenceError: Regeneratorruntime Is Not Defined”.

If you still need assistance or have general JavaScript questions, we have one vibrant community where all members are always willing to give you a hand.  

In closing, we wish you an even more successful day with new solutions and new code.

Related Posts

Scroll to Top