What are the valid width constraints when using setBlockEditorWidth(width, callback())?

What are the valid width constraints when using setBlockEditorWidth(width, callback())?

• A. Width can be 300px.
• B. Between 426px and 849px.
• C. Width persists across sessions.
• D. Percentage widths are supported.

Answer: (B)

The important thing here is that the width you pass to setBlockEditorWidth must be a fixed pixel value within a specific range. The valid range is from 426px up to 849px, inclusive. This keeps the block editor-sized properly within the surrounding interface, preventing it from becoming too narrow or too wide on different screens. So why the other options aren’t the right fit? A value like 300px is below the minimum, so it would violate the supported bounds. Percentage widths aren’t supported by this function because it requires a concrete pixel width. The idea that the width persists across sessions isn’t about the allowed input range itself; the key constraint you must follow is staying within 426–849px.

The important thing here is that the width you pass to setBlockEditorWidth must be a fixed pixel value within a specific range. The valid range is from 426px up to 849px, inclusive. This keeps the block editor-sized properly within the surrounding interface, preventing it from becoming too narrow or too wide on different screens.

So why the other options aren’t the right fit? A value like 300px is below the minimum, so it would violate the supported bounds. Percentage widths aren’t supported by this function because it requires a concrete pixel width. The idea that the width persists across sessions isn’t about the allowed input range itself; the key constraint you must follow is staying within 426–849px.