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    JSVAL_IS_NULL

    Obsolete since JSAPI 32
    This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

    Determine if a given jsval is null.

    Syntax

    JSVAL_IS_NULL(v)
    

    Description

    JSVAL_IS_NULL(v) is true if v is JSVAL_NULL, which is the JavaScript null value.

    (Note: JSVAL_IS_OBJECT(JSVAL_NULL) is also true.)

    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)) {
        ...
    }
    

    See Also

    Document Tags and Contributors

    Contributors to this page: arai, fscholz, Jorend, Rappo
    Last updated by: arai,
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