Many web developers think the DOM is really difficult (or slow) and you need a huge framework to tame it. Then they invest a lot of their time to learn the framework. A year or two passes, another framework becomes popular and you need to learn everything from scratch.
To start learning about DOM manipulation, let's begin with a practical example.Take a local copy of the dom-example. ... Add a element just above the closing
The DOM is a tree-like representation of the web page that gets loaded into the browser. It represents the web page using a series of objects. The main object is the document object, which in turn houses other objects which also house their own objects, and so on.
And you don't need to learn the DOM before, learning it after React is OK. React is an abstraction to the DOM. Abstractions let you perform some tasks without knowing how they work under the hood. When you create components in React, the library handles all the DOM manipulation for you.
You need practice, and experience to know what exactly is going on when you do different things, and how different browsers interpret what you're doing. Of course, there are things you can do, one is to start taking tutorials at HTML Dog (check out JavaScript & HTML DOM in left menu).
The DOM is often referred to as the DOM tree, and consists of a tree of objects called nodes. In the Introduction to the DOM, we went over what the Document Object Model (DOM) is, how to access the document object and modify its properties with the console, and the difference between HTML source code and the DOM.
Introduction. The Document Object Model (DOM) is a programming API for HTML and XML documents. It defines the logical structure of documents and the way a document is accessed and manipulated.
The Document Object Model (DOM) is a programming interface for web documents. It represents the page so that programs can change the document structure, style, and content. The DOM represents the document as nodes and objects; that way, programming languages can interact with the page.
Advantages. By manipulating the DOM, you have infinite possibilities. You can create applications that update the data of the page without needing a refresh. Also, you can create applications that are customizable by the user and then change the layout of the page without a refresh.
Is this enough to learn before tackling React? Not really. Once you know the basic programming syntax, which can be JavaScript or Python, you should familiarize yourself with manipulating the Document Object Model (DOM). For this, you will eventually need to learn JavaScript.
In an ideal situation you don't need jQuery, your better off using the real DOM API and using polyfills for browser compliance. Knowing and using the real DOM API increases readability/maintainability because all web developers know the DOM and only some know library X.
DOM manipulation is interacting with the DOM API to change/modify the HTML document that is to be rendered on the web browser. This HTML document can be changed/modified to add elements, remove elements, edit elements, move elements around, etc.
Building a House. If we were building a house, we would have to follow three main steps: Build the structure ( i.e. wood, concrete, brick, roofing, etc.) Set up plumbing, electric, water lines, and other functional requirements. Make the house look good with paint, siding, and landscaping.
You could live in your house with only the structure (HTML), but it wouldn't be pleasant. You could live in your house with only the structure (HTML) and decorative touches (CSS), but unfortunately, you'd be living in a beautiful house where the toilets don't flush and the light switches don't turn on the lights.
Like we learned about before, the DOM is not a programming language, and it's not actually part of native JavaScript. It is a "model" for an HTML Document. Within that "model", we have "branches" and "leaves" just like a tree. Translated into programming-speak, we call each of these branches and leaves "Nodes". And no, this has nothing to do with NodeJS (a server-side JavaScript runtime we will be working with soon).
Line breaks do not affect HTML. You also might have noticed when looking through the code that there was a significant space between blocks of HTML code, but in the output, those same spaces did not exist. You might think that the following code would result in a large space between the paragraphs:
While we have far less ground to cover here than we did with JavaScript (HTML is much simpler), there are still HTML concepts that are overkill for you to learn if you are trying to become a web developer quickly. For example, HTML has a "tag" (we'll talk more on this) called <table> which allows you to create tables.
Understand what a Dom is A Dom is someone who wishes to express dominance over someone’s life. A Top is someone who wishes to play a dominant role during a scene. People can be either or both. But understand that being a Dom is a huge responsibility, and your priorities need to be more noble than getting sexual gratification.
The kink work has no shortage of self proclaimed prophets of uber domly dominance who are extremely proficient at talking the talk, but are utterly useless at walking the walk. Before you put someone on a pedestal, and treat every word they say as gospel, make sure your brain is still engaged.
Likewise, the word “Dom” and the word “Egomaniac” are virtually synonyms. And too many Doms don’t want to admit to a sub that they don’t know something, aren’t an expert at something, and probably shouldn’t Top a particular type of play.