This feature is obsolete. Although it is still supported by browsers, its usage is discouraged in new projects. Try to avoid using it.
| || ||The context in which to create the new number. Requires request. In a |
| || ||The number to copy.|
Warning: The argument
d must not be a value that could fit in an integer
jsval. If it is,
JS_NewDouble creates a bad
jsdouble that might behave as desired in some cases but not others.
jsdouble is subject to garbage collection until you protect it using a local root, an object property, or the
JS_NewDouble returns a pointer to the new number. Otherwise it returns
The application must treat the returned pointer as read-only. Modifying a
jsdouble allocated with this function can cause undefined behavior.