This behavior is how JavaScript engine (e.g V8) starts out by parsing the source code into an Abstract Syntax Tree(AST). For {}, JavaScript parser considers it as an empty block because this is the first thing in the statement. But in the case of [] + {}, the first thing is an array followed by Addition operator.
Here's a nice AST explorer to check out. Paste both the statement to verify yourself. 🙂
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
For {} + [], {} is not an empty object but just an empty block; for [] + {}, {} is an object.
How did we reach these conclusions?
Hi Ravina,
This behavior is how JavaScript engine (e.g V8) starts out by parsing the source code into an Abstract Syntax Tree(AST). For
{}, JavaScript parser considers it as an empty block because this is the first thing in the statement. But in the case of[] + {}, the first thing is an array followed by Addition operator.Here's a nice AST explorer to check out. Paste both the statement to verify yourself. 🙂