Quick Reference
This is a quick reference list of JavaScript object methods and properties with examples of how they are used.
- JavaScript – Working with Data TypesJavaScript has 8 Datatypes: String, Number, Bigint, Boolean, Undefined, Null, Symbol, and Object.
- JavaScript – Creating an ObjectJavaScript objects are variables that can contain many values, and are created using the object literal, the new keyword, or using an object constructor.
- JavaScript – Object Properties and MethodsJavaScript object properties can be changed, added, deleted, and mad read only. Object methods are actions that can be performed on objects.
- JavaScript – Displaying Object PropertiesJavaScript object properties can be displayed according to name, within a loop, using Object.values(), or using JSON.stringify().
- JavaScript – Using Object ConstructorsWhen many JavaScript objects of the same type need to be created, an “object type” can be be created using an object constructor function.
- JavaScript – The “this” Keyword in ObjectsIn JavaScript, the this keyword is used to refer to various objects.
- JavaScript – Destructuring ObjectsIn JavaScript Objects, unpacking the object properties into variables is called destructuring.
- JavaScript – Object IterationsIn JavaScript, there are numerous ways to iterate though the properties of an object.
- JavaScript – Object ManagementIn JavaScript, there are numerous methods used to manage an object by accessing, changing, or returning properties.
- JavaScript – Object AccessorsIn JavaScript, getters and setters allow you to define Object Accessors (Computed Properties).
- JavaScript – Object ProtectionIn JavaScript, there are numerous ways to protect an Object from being changed.
- JavaScript – Object.assign() MethodThe JavaScript Object.assign() method copies properties from one or more source objects to a target object.
- JavaScript – Object constructor PropertyThe Object constructor property returns the function that created the Object prototype.
- JavaScript – Object.keys() MethodThe Object.keys() method returns an array iterator object with the keys of an object, without changing the original object.
- JavaScript – Object prototype PropertyThe Object prototype property allows the addition of new properties and methods to objects.
- JavaScript – Object toString() MethodThe Object toString() method returns an object as a string or “” if it cannot return a string.
- JavaScript – Object valueOf() MethodThe Object valueOf() method returns the primitive value of an object, or the object itself if it has no primitive.
JavaScript Notes:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- JavaScript variables are case sensitive (x is not the same as X)
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.