42 lines
913 B
Plaintext
42 lines
913 B
Plaintext
== Why is this an issue?
|
|
|
|
The use of wrapper objects for primitive types is gratuitous, confusing and dangerous. If you use a wrapper object constructor for type conversion, just remove the ``++new++`` keyword, and you'll get a primitive value automatically. If you use a wrapper object as a way to add properties to a primitive, you should re-think the design. Such uses are considered bad practice, and should be refactored.
|
|
|
|
|
|
=== Noncompliant code example
|
|
|
|
[source,javascript]
|
|
----
|
|
let x = new Number("0");
|
|
if (x) {
|
|
alert('hi'); // Shows 'hi'.
|
|
}
|
|
----
|
|
|
|
|
|
=== Compliant solution
|
|
|
|
[source,javascript]
|
|
----
|
|
let x = Number("0");
|
|
if (x) {
|
|
alert('hi');
|
|
}
|
|
----
|
|
|
|
|
|
ifdef::env-github,rspecator-view[]
|
|
|
|
'''
|
|
== Implementation Specification
|
|
(visible only on this page)
|
|
|
|
include::message.adoc[]
|
|
|
|
'''
|
|
== Comments And Links
|
|
(visible only on this page)
|
|
|
|
include::comments-and-links.adoc[]
|
|
endif::env-github,rspecator-view[]
|