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However, it may happen that your environment requires ES5. For instance, if you use tools like [UglifyJS](https://github.com/mishoo/UglifyJS) which do not support ES6+ yet, you may need to transpile CKEditor 5's source to ES5. This will create ~80% bigger builds but will ensure that your environment can process CKEditor 5's code.
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However, it may happen that your environment requires ES5. For instance, if you use tools like [UglifyJS](https://github.com/mishoo/UglifyJS) which do not support ES6+ yet, you may need to transpile CKEditor 5's source to ES5. This will create ~80% bigger builds but will ensure that your environment can process CKEditor 5's code.
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