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jQuery

PropertyValue
descriptionjQuery
tagsref

Overview​

jQuery is a JavaScript library created to simplify DOM manipulation, events, AJAX, and cross-browser scripting patterns.

It matters because a large amount of legacy and long-lived frontend code still depends on jQuery patterns, plugins, and APIs.

What jQuery Was Designed For​

jQuery became popular because it reduced the friction of working with browsers and the DOM during a period when native browser APIs were less consistent.

It commonly helped with:

  • DOM selection and manipulation
  • events
  • AJAX requests
  • effects and simple UI behaviors
  • cross-browser scripting differences

That made it one of the defining JavaScript tools of an earlier generation of frontend development.

Why jQuery Still Matters​

jQuery is no longer the default choice for most new frontend applications, but it still matters because:

  • many existing sites still use it
  • older plugins and themes depend on it
  • maintenance work often involves reading or updating jQuery code

That makes jQuery relevant in legacy frontend work, CMS themes, and environments where modern frameworks were not part of the original stack.

jQuery vs Modern Frontend Frameworks​

jQuery and modern frameworks solve different levels of the problem.

  • jQuery focuses on imperative DOM manipulation and browser utilities.
  • Modern frameworks often provide component models, reactive state, and larger application architecture patterns.

That is why jQuery is usually discussed today in terms of maintenance, interoperability, or incremental enhancement rather than as the default foundation for new application architecture.

Common jQuery Contexts​

jQuery still appears in:

  • legacy websites
  • older WordPress themes and plugins
  • admin interfaces and one-off interactive layers
  • codebases that predate modern framework adoption

Understanding it is still useful when working across long-lived web projects.

Frequently Asked Questions​

Is jQuery outdated?​

It is no longer the default first choice for many new projects, but it is still widely present in older codebases and maintenance work.

Is jQuery a framework?​

It is more accurately described as a JavaScript library than a full application framework.

Do developers still need to know jQuery?​

Sometimes yes, especially when working with older websites, plugins, themes, or CMS-driven frontend code.

Resources​