Can a javascript class return another class?

Is it a bad practice to return a class inside the method of another class?

Example: createBlockClass method

class BlockBuilder {
    constructor (methodForBlock) {
        this.methodForBlock = methodForBlock;
    };

    createBlockClass () {
        const method = this.methodForBlock.bind(this.methodForBlock);
        return class Block {
            constructor(title) {
                this.title = title;
            };
            method = method;
        }
    }
};

const blockBuilder = new BlockBuilder(() => console.log('Hello, world!!!'));
const Block = blockBuilder.createBlockClass();
const block1 = new Block("block one");
const block2 = new Block("block two");
block1.method();
block2.method();

I need to receive a method as a parameter and add it to the block class before creating any instance

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