JSVAL_IS_NULL

by 4 contributors:

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This feature is obsolete.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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