JS_StrictlyEqual 编辑

This article covers features introduced in SpiderMonkey 1.8.1

Determine whether two JavaScript values are equal in the sense of the === operator.

Syntax

// Added in SpiderMonkey 45

bool
JS_StrictlyEqual(JSContext *cx, JS::Handle<JS::Value> v1, JS::Handle<JS::Value> v2,
                 bool *equal);


// Obsolete since JSAPI 39

bool
JS_StrictlyEqual(JSContext *cx, jsval v1, jsval v2, bool *equal);

Description

JS_StrictlyEqual determines if v1 is strictly equal to v2 under the JavaScript === operator, as specified in ECMA 262-3 §11.9.6. If the comparison attempt was successful, the method returns true and stores the result in *equal; otherwise it returns false.

Comparing jsvals directly in C++, as in v1 == v2, does not produce a meaningful result, since it is possible for two distinct JSStrings or jsdoubles to represent the same string or number.

See Also

• MXR ID Search for JS_StrictlyEqual
• JS_LooselyEqual
• JS_SameValue
• bug 1132045 -- use handle