XHR (XMLHttpRequest) - MDN Web Docs Glossary: Definitions of Web-related terms 编辑

XMLHttpRequest (XHR) is a JavaScript API to create AJAX requests. Its methods provide the ability to send network requests between the browser and a server.

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General knowledge

• XMLHttpRequest on Wikipedia
• Synchronous vs. Asynchronous Communications

Technical information

• The XMLHttpRequest object.
• The documentation on MDN about how to use XMLHttpRequest.