I know that most everything is an object in JavaScript. When people say "object literal," do they mean an object like this?
var thing = {
'foo': 'bar'
, 'baz': 'foo'
, 'bar': 'baz'
};
Yes, that's exactly what object literal means. A definition of a javascript object which may contain comma separated definition of properties, functions, ...
Object literals are formed using the following syntax rules:
- A colon separates property name from value.
- A comma separates each name/value pair from the next.
- There should be no comma after the last name/value pair. Firefox won't object if you add it, but Internet Explorer will trigger an error: 'Expected identifier, string or number'.
An object literal is a way to declare an object.
You would write
var myObject = {}; // with or without members
instead of
var myOject = new Object();
You can also use array literals:
var myArray = [];
instead of
var myArray = new Array(); // with or without members
It's shorter, of course but it also bypasses the constructor so it's supposed to be more efficient.
It's supposed to represent a notational delineation. When they say 'object literal', they mean 'object literal notation'. There are various ways to make an object. This is the most straightforward approach.
Yes. Read more. http://www.dyn-web.com/tutorials/obj_lit.php
Yes.
In the object literal notation, an object description is a set of comma-separated name/value pairs inside curly braces. The names can be identifiers or strings followed by a colon.
Yes, more or less. The "literal" is the source-code representation of the object; so, just the part from {
to }
, not the rest of the declaration.
A good reference: https://developer.mozilla.org/en/JavaScript/Guide/Values,_Variables,_and_Literals#Object_Literals .
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