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What will happen if you register two blocks with the same name using registerBlockType?

medium📝 component behavior Q5 of 15
Wordpress - Shortcodes and Blocks
What will happen if you register two blocks with the same name using registerBlockType?
AThe first block is duplicated in the editor
BThe second registration overwrites the first block
CWordPress throws a fatal error and stops loading
DBoth blocks appear separately in the editor
Step-by-Step Solution
Solution:

  1. Step 1: Understand block name uniqueness

    Block names must be unique. Registering the same name twice causes the second to overwrite the first.

  2. Step 2: Confirm WordPress behavior on duplicates

    WordPress does not throw fatal errors but replaces the first block with the second registration.

  3. Final Answer:

    The second registration overwrites the first block -> Option B

  4. Quick Check:

    Duplicate block names overwrite previous [OK]
Quick Trick: Block names must be unique; duplicates overwrite [OK]
Common Mistakes:
  • Expecting both blocks to appear
  • Thinking WordPress throws fatal error
  • Assuming duplication creates two blocks

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