Entry: JS_LookupProperty (Function)
Summary: Determines if a specified property exists.
Syntax:
JSBool JS_LookupProperty(JSContext *cx, JSObject *obj,
const char *name, jsval *vp);
Argument Type Description
cx JSContext * Pointer to a JS context from which to derive runtime information.
obj JSObject * Object to search on for the property.
name const char * Name of the property to look up.
vp jsval * Pointer to a variable into which to store the last retrieved value of the property if it exists. If not, vp is set to JSVAL_VOID.
Description:
JS_LookupProperty examines a specified JS object, obj, for a property named name. If the property exists, vp is set either to the last retrieved value of the property if it exists, or to JSVAL_VOID if it does not, and JS_LookupProperty returns JS_TRUE. On error, such as running out of memory during the search, JS_LookupProperty returns JS_FALSE, and vp is undefined.
See also:
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