Reading-Notes

My journal for Code Fellows

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Problem Domain, Objects, and the DOM

Chapter 3: Object Literals

• Variables apart of an object are known as properties
• Functions within objects are known as methods
• A property consists of a key and its value
• this. is used to reference the properties of the current object it is in
• dot notations is used to access the properties of objects

Chapter 5: Document Object Model

• The DOM is a tree made up of objects
• This model is how the page is structured
• getElementById() - selecting individual node by id
• querySelector() - use a CSS selector and return first match
• getElementByClassName() - selects all elements with that class attribute
• getElementsByTagName() - selects all with the specified tag
• querySelectorAll() - selects all CSS with the specified selector
• When a DOM list returns more than one element, it returns as a NodeList
• Elements in this NodeList can be accessed similar to an array with indexes
• NodeList are known as an object called a collection
• parentNode selects the parent node to the node currently in
• previousSibling and nextSibling return the previous or next node
• firstChild and lastChild return the first or last node of the current element

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