Editing NOP (code) (section)

=== JavaScript ===
The [[JavaScript]] language does not have a built-in NOP statement. Many implementations are possible:
* Use the <code>;</code> ''empty statement''<ref>MDN JavaScript reference – [https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/Empty empty statement]. "The empty statement is a semicolon (<code>;</code>) indicating that no statement will be executed, even if JavaScript syntax requires one."</ref> or the <code>{}</code> empty ''block statement'' the same way as in the [[NOP (code)#C_and_derivatives|C and derivatives]] examples;
* Use the <code>undefined</code> or the <code>null</code> expression as a complete statement (an ''expression statement'') when the previous methods are not allowed by the syntax.
Alternatives, in situations where a function is required, are:
* Use the <code>Function.prototype()</code> built-in function, that accepts any arguments and returns <code>undefined</code>;<ref>ECMAScript Language Specification – Edition 5.1 – [https://www.ecma-international.org/ecma-262/5.1/#sec-15.3.4 Properties of the Function Prototype Object]</ref>
* Use a NOP function available in a third-party library —see below;
* Define a custom NOP function, as in the following example (using the [[ES6]] arrow function syntax):
<syntaxhighlight lang="javascript">const noop = () => {};</syntaxhighlight>

==== AngularJS ====
The [[AngularJS]] framework provides [https://docs.angularjs.org/api/ng/function/angular.noop angular.noop] function that performs no operations.

==== jQuery ====
The [[jQuery]] library provides a function <code>jQuery.noop()</code>, which does nothing.<ref>[http://api.jquery.com/jquery.noop/ jQuery.noop()] from jQuery API documentation</ref>

==== Lodash ====
The [[Lodash]] library provides a function <code>_.noop()</code>, which returns undefined and does nothing.<ref>{{Cite web|url=https://lodash.com/docs/#noop|title=Lodash Documentation|website=lodash.com|language=en|access-date=2017-12-15}}</ref>