feat: add IsNullOrUndefined #909
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napi.h
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| bool IsUndefined() const; ///< Tests if a value is an undefined JavaScript value. | ||
| bool IsNull() const; ///< Tests if a value is a null JavaScript value. | ||
| bool IsUndefined() const; ///< Tests if a value is an undefined JavaScript value. | ||
| bool IsNullOrUndefined() const; ///< Tests if a value is a null or undefined JavaScript value. |
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Maybe IsNullish would be more concise. With the definition of ?? from MDN as (emphasis mine)
The nullish coalescing operator (??) is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined, and otherwise returns its left-hand side operand.
KevinEady
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KevinEady
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Hi @januwA ,
Thanks for your patience. So take a look at the comments. Also, you will need to add documentation to doc/value.md and a tests to test/basic_types/value.js. For the test, I think checking for true on null and undefined, and false on something else is a good enough test coverage.
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| inline bool Value::IsNullish() const { | ||
| return Type() == napi_undefined || Type() == napi_null; |
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The compiler may optimize this since it is const, but let's store the Type() call in a variable or use a switch statement to ensure it isn't called twice.
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@januwA are you still planning to move this forward? |
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Added IsNullOrUndefined detection js type function 😃