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Summary
Determines if a specified JS value is null.
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Syntax
JSVAL_IS_NULL(v)
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Description
Use JSVAL_IS_NULL to determine if a given JS value, v, contains a null value. If v is JSVAL_NULL, JSVAL_IS_NULL evaluates to true. Otherwise, it evaluates to false. These return types are C values, not JS Boolean values.
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Example
The following code snippet illustrates how a JavaScript variable, MyItem, is conditionally tested in an if statement to see if it contains a null value.
if (JSVAL_IS_NULL(MyItem)) {
. . .
}
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Notes
Even though v may contain a null value, its type tag is always JSVAL_OBJECT.
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See Also
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