If you are a web developer working with CSS, HTML, javascript, or bootstrap, you might have encountered the TypeError: this.getOptions is not a function error. There can be many reasons for getting this error. Sometimes, installing Bootstrap can cause this error as well. In this short article, we will discuss the reasons for getting TypeError: this.getOptions is not a function error and we will come across various methods to solve the error.
TypeError: this.getOptions is not a function – Possible Solutions
You might be frustrated by getting this error. The solution to the error is straightforward. There can be many reasons for getting this error. It might be because you have installed Bootstrap on your system or it can also occur during great project development. It does not matter for what reason you are getting TypeError: this.getOptions is not a function error, we will go through various possible solutions which you can follow in order to get rid of the error.
It does not matter whether you are working with Bootstrap or react, the error usually occurs because of the version of sass-loader. The sass loader is either too high or too low. It means the installed version of sass-loader does not correspond to the current node version and it is not compatible with the getOptions method and we are getting errors.
Solution-1: Uninstall the sass loader and install it again
As we know the error is because of the conflict in the version of the sass-loader. So, one solution is to uninstall the sass loader that is on your system and install it again.
You can use the following commands to uninstall and install the sass-loader on your system.
// uninstalling the sass-loader
npm uninstall node-sass sass-loader
// installing the sass loader
npm install sass-loader^8
// installing sass
npm install sassNow you will have an updated version of the sass-loader installed on your system.
Solution-2: Remove original less-loader
Another method to get rid of the TypeError: this.getOptions is not a function error is to remove the original less-loader from the system and install the lower version of the less-loader on your system.
You can remove the less loader using the following commands:
// remove original less loader
npm uninstall less-loaderThe next step is to install the lower version of less loader on your system using the following commands.
// installing less loader
npm install less-loader@6.0.0Once you install the new version of less-loader on your system, you need to restart the server.
npm run serverCongratulations, you solved the error.
understanding the TypeError: this.getOptions is not a function error
The error clearly says that there is a TypeError which means we are trying to apply a method or attribute to the wrong function. The second part of the error gives more specific information which says, that this.getOptions is not a function which means we are trying to use this.getOptions as a function that is not a function.
What is TypeError?
A TypeError is an error that occurs when we try to use an attribute with a function that does not support it. In other words, when we try to apply a function on a wrong data type, we get TypeError.
Summary
In this short article, we discussed the TypeError: this.getOptions is not a function error. We came across various reasons for getting the error and solve it using a couple of methods. Now, we know that the error occurs because of a conflict in the version of the sass-loader and can be solved by installing the correct version of the sass-loader.
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