How do I find an element by class name?

By Lexie Tanner 4 years ago

How do I find an element by class name?

The getElementsByClassName() method returns a collection of all elements in the document with the specified class name, as an HTMLCollection object. The HTMLCollection object represents a collection of nodes. The nodes can be accessed by index numbers.

What is a class of element?

Elements in different groups are lumped together in one of three classes, depending on their properties. The classes are metals, nonmetals, and metalloids. Knowing the class of an element lets you predict many of its properties.

How do you select a class element?

To select elements by a given class name, you use the getElementsByClassName() method:

  1. let elements = document.getElementsByClassName(‘className’);
  2. JavaScript getElementsByClassName() example

    The first note.

Is there a get element by class?

In JavaScript, you use the getElementsByClassName() method to select elements based on their classes. The getElementsByClassName() method is available on the document object and any HTML element.

How do I get the class of an element in HTML?

HTML DOM className Property

  1. Set the class for a element with id=”myDIV”:
  2. Get the class name of the first element in the document (if any):
  3. Other examples on how to get the class name of an element:
  4. Get the class names of an element with multiple classes:
  5. Overwriting an existing class name with a new one:

How do you check if an element contains a class in JavaScript?

To check if an element contains a class, you use the contains() method of the classList property of the element:

  1. element.classList.contains(className);
  2. const div = document.querySelector(‘.info’); div.classList.contains(‘secondary’); // true.

What is a class name?

In many languages, the class name is used as the name for the class (the template itself), the name for the default constructor of the class (a subroutine that creates objects), and as the type of objects generated by instantiating the class; these distinct concepts are easily conflated. …

What is difference between getElementById and getElementsByClassName?

getElementById returns a single DOM element whose ID matches your query. getElementsByClassName returns an HtmlCollection – an array-like structure containing the DOM elements that matched your query. You have to iterate through each element in the array to apply your style.

How do you find the class name in an event target?

You can use jQuery to check for classes by name: $(event. target). hasClass(‘konbo’);

What does getElementsByClassName () function return?

The getElementsByClassName method of Document interface returns an array-like object of all child elements which have all of the given class name(s). When called on the document object, the complete document is searched, including the root node.

What does getelements byclassname do in elements?

elements is a live HTMLCollection of found elements. names is a string representing the list of class names to match; class names are separated by whitespace getElementsByClassName can be called on any element, not only on the document. The element on which it is called will be used as the root of the search.

How to call document.getelementsbyclassname ( names ) in HTML?

var elements = document.getElementsByClassName(names); // or: var elements = rootElement.getElementsByClassName(names); elements is a live HTMLCollection of found elements. getElementsByClassName can be called on any element, not only on the document. The element on which it is called will be used as the root of the search.

How to get the names of the elements in HTML?

var elements = document.getElementsByClassName(names); var elements = rootElement.getElementsByClassName(names); elements is a live HTMLCollection of found elements. names is a string representing the class name (s) to match; multiple class names are separated by whitespace

How to search for multiple class names in HTML?

To search for multiple class names, separate them with spaces, like “test demo”. An HTMLCollection object, representing a collection of elements with the specified class name. The elements in the returned collection are sorted as they appear in the source code.