The DOM. What is it? And how can you use it to make your scripts even more interactive?
The DOM, or Document Object Model, is a programming interface for HTML, XML, and SVG documents. It represents the structure of a document as a tree of objects, with each object representing a part of the document (for example, an element might be a paragraph tag or the title of your post).
The DOM allows you to manipulate the content and structure of a document by changing the properties of these objects and adding or removing objects from the tree.
document object, which is a global object that represents the current document. For example, to get a reference to the
element of the current document, you can use the
Once you have a reference to the DOM object you want to manipulate, you can use its properties and methods to modify the element. For example, to change the text content of an element, you can use the
innerHTML property, which sets or returns the HTML content within an element. To add a new element to the DOM, you can use the
createElement() method, which creates a new element with the specified tag name, and the
appendChild() method, which adds the new element as a child of the element you want to append it to.
It’s important to note that the DOM is a live representation of a document, which means that any changes you make to the DOM are immediately reflected in the document. This can be both a blessing and a curse, as it allows you to easily and quickly make changes to a document, but also means that you need to be careful not to make too many changes at once, as it can affect the performance of your code.
In addition to the basic DOM manipulation techniques described above, there are many other methods and properties available for working with the DOM. Some examples include the
getElementById() method, which returns a reference to an element with the specified ID, and the
querySelector() method, which returns a reference to the first element that matches a specified CSS selector.