Document methods in javascript

The document object in JavaScript provides methods for accessing and manipulating HTML documents. Common methods include: getElementById(id): Get an element based on ID. getElementsByTagName(tag): Get the element collection based on the tag name. getElementsByClassName(class): Get the element collection based on the class name. querySelector(selector): Get the first matching element based on the CSS selector. querySelectorAll(selector): Get the set of matching elements based on CSS selectors.

The document method in JavaScript

The document object in JavaScript represents the current HTML document. It provides a rich API for accessing and manipulating document elements and structures.

Common document methods

The following are the most commonly used document methods:

• ##getElementById(id): According to The element's id attribute gets the element reference.
• getElementsByTagName(tag): Get the collection of all matching elements based on the tag name.
• getElementsByClassName(class): Get the collection of all matching elements based on the class name.
• querySelector(selector): Get the first matching element using a CSS selector.
• querySelectorAll(selector): Get a collection of all matching elements using a CSS selector.
• createElement(element): Create a new element.
• appendChild(child):Append a child element to the current element.
• removeChild(child): Removes child elements from the current element.
• createTextNode(text): Create a text node.
• write(text): Write HTML code to the document stream.

Use document method

To use document method, you can use the following syntax:

<code class="javascript">document.<method_name>(parameters);</code>

For example, to get elements based on id, you can Use the following code:

<code class="javascript">const element = document.getElementById("element-id");</code>

Other methods

In addition to the methods listed above, the document object provides the following additional methods:

• addEventListener(event, listener): Add an event listener to the document.
• removeEventListener(event, listener): Remove the event listener from the document.
• getComputedStyle(element): Get the calculated style of the element.
• documentElement: Returns the root element of the document (usually the element).
• body: Returns the body element of the document (usually the element).

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