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ElementHelper is a JavaScript class that adds extra functionality to interact with DOM elements. This class is part of a larger project and can be imported from the @knighttower/adaptive package.




ElementHelper Class Documentation

yarn add @knighttower/element-helper
import ElementHelper from '@knighttower/element-helper';


ElementHelper is a JavaScript class that adds extra functionality to interact with DOM elements. This class is part of a larger project and can be imported from the @knighttower/adaptive package.

Table of Contents

  1. Author and License
  2. Class Definition
  3. Constructor
  4. Public Methods
  5. Private Section
  6. Examples

Author and License

Class Definition

export default class ElementHelper


  • selector (String|Object): Class, ID, or DOM element.
  • scope (String): The scope to search in. Defaults to document.


  • Returns an Object instance of ElementHelper.


const element = new ElementHelper('elementSelector') // return the DOM element
const element = new ElementHelper('elementSelector', domElement|window|document)


constructor(selector, scope = document)

Initializes the ElementHelper class with the given selector and scope.

Public Methods


  • Returns: Boolean
  • Description: Checks if the element exists or is visible in the DOM.


  • Returns: Promise
  • Description: Waits until the element exists or becomes visible in the DOM.
  • const element = new ElementHelper('elementSelector').whenInDom() // element.then() => {}


  • Parameters: xpath (String)
  • Returns: Object (DOM element)
  • Description: Finds an element by its XPath string.
  • Example: getElementByXpath("//html[1]/body[1]/div[1]")


  • Returns: String
  • Description: Returns the XPath string of the element.
  • Example: const elementPath = new ElementHelper('elementSelector').getXpathTo()


  • Parameters: attr (String)
  • Returns: String|Array|Object|Null
  • Description: Gets the value of the specified attribute.
  • Example: const elementAttr = new ElementHelper('elementSelector').getAttribute('style') // returns all inline styles


  • Returns: String
  • Description: Creates a unique hash for the element derived from its XPath.

Private Section

This section is reserved for future enhancements, possibly to extend the prototype of DOM elements.


const element = new ElementHelper('.my-class');
if (element.isInDom()) {
  // Do something

element.whenInDom().then((elem) => {
  // Do something when element is in DOM

const attrValue = element.getAttribute('data-attribute');

This documentation covers all the features, methods, and examples mentioned in the provided code. Please note that the code relies on DomObserver from the @knighttower/js-dom-observer package, which is not covered in this documentation.