js-mod4/level2.txt at master · tango-one/js-mod4 · GitHub

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1.    What is the DOM?


	Answer:		DOM = "Document Object Model".
			As the html page is loaded a web page page consists og head, body, etc these
			is what we refer to when we say "DOM" as these can be manipulated by the developer.

	Source: https://www.w3.org/DOM/
		https://www.w3schools.com/js/js_htmldom.asp


2.    List three methods to manipulate the DOM.

	Answer:	(1) - document.getelmentbyid
		(2) - document.getelmentbytagname
		(3) - document.getelmentbyclassname

	source:	https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Client-side_web_APIs/Manipulating_documents
		https://www.w3.org/TR/DOM-Level-1/introduction.html
		https://www.w3schools.com/js/js_htmldom_document.asp


3.    What is an asynchronous call?

	Answer:	When our code is running in javascript it will run trough the code as it is writen.
		In a asynchronous call section of our code will wait to be executed in a spesific time.


	Source:	https://medium.freecodecamp.org/javascript-from-callbacks-to-async-await-1cc090ddad99


4.    Briefly explain what the sources tab in Chromes Developers Tools does.


	Answer:	When we press CTRL+I and select the "Source" tab we can see a tree structure of the site or doc we are
		visting and we see here the source of the site.


5.    What is a JavaScript promise?


	Answer:	Promise is code that "maybe" will produce a value somewhere in the future that can produce a action.
		It can be of "fullfilled","Rejected", or "pending".

		Source:	https://scotch.io/tutorials/javascript-promises-for-dummies <--- (please read this :) )
		https://medium.com/javascript-scene/master-the-javascript-interview-what-is-a-promise-27fc71e77261

6.    What is an API?


	Answer:		API Or Apllication Program Interface.

			We use API to get data from another source, lets say we build a weather app
			then we can use a api from a weather service so we can deliver weather
			stat in our app or site.


7.    What is a JavaScript Event?


	Answer:		Event is something that will happen in our code it can be a click-event so a action
			that will take place after a user have clicked a button.


	Source:	https://developer.mozilla.org/en-US/docs/Web/Events


8.    What is event bubbling?


	Answer:		It describs when the event is called in our code.

	Source:		https://www.sitepoint.com/event-bubbling-javascript/