When Should You Choose Vanilla JavaScript Over jQuery?

When to Use Vanilla JavaScript over jQuery: Specific Instances

While jQuery is a valuable tool, certain instances warrant the use of vanilla JavaScript. These scenarios offer increased efficiency, improved readability, and reduced code complexity. Here are notable examples:

Accessing DOM Properties

• this.id: Reference the ID of the clicked element within a click event.
• this.value: Obtain the value of input elements (excluding elements).
• this.className: Get or set the entire "class" property.
• this.selectedIndex: Retrieve the selected index of elements.
• this.options: Retrieve a list of elements within elements.
• this.text: Access the text content of elements.
• this.rows: Obtain a collection of elements from a .
  this.cells: Get cells (td & th) within a
  .
  this.parentNode: Access the direct parent element.

  Retrieving Element State Properties

  • this.checked: Determine the checked state of checkbox inputs.
  • this.selected: Check if an option is selected.
  • this.disabled: Ascertain the disabled state of input elements.
  • this.readOnly: Retrieve the readOnly state of input elements.

  Attributes and Links

  • this.href: Access the href property of elements.
  • this.hostname: Get the domain from the href of elements.
  • this.pathname: Retrieve the path from the href of elements.
  • this.search: Obtain the querystring from the href of elements.
  • this.src: Access the src property of elements that support it.

  Advanced DOM Manipulation

  While jQuery offers convenience for DOM manipulation, vanilla JavaScript provides more granular control, optimizing performance in critical scenarios:

  • Attribute Access and Modification: Replace $(el).attr('someName'); with el.getAttribute('someName');.
  • Element Unwrapping: Handle unwrapping elements efficiently with:

  <code class="javascript">var spans = document.getElementsByTagName('span');
  
  while( spans[0] ) {
      var parent = spans[0].parentNode;
      while( spans[0].firstChild ) {
          parent.insertBefore( spans[0].firstChild, spans[0]);
      }
      parent.removeChild( spans[0] );
  }</code>

  In conclusion, while jQuery streamlines certain tasks, vanilla JavaScript remains essential for scenarios demanding efficiency, readability, and fine-grained control over the DOM.

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