XMLHttpRequest Standard
Business Profile
Core Value Proposition
XMLHttpRequest Standard provides scripted client functionality for transferring data between a client and a server.
Target Customer
Web developers building client-side web applications who need to perform HTTP requests.
Key Differentiator
Living standard maintained by WHATWG; continuously updated with a detailed API specification and browser-facing interfaces; includes support for multiple response types, event handling, and progress reporting.
Implementation Timeline
Not specified in content; living standard updated as of 18 August 2025
Pain Points
- 1Need for a standard JavaScript API to perform HTTP requests from web pages
- 2Fine-grained control over request headers, timeouts, credentials and response handling
- 3Support for progress events and various response types (text, JSON, blob, document, etc.)
Key Features
- 1Constructor: new XMLHttpRequest() and associated XMLHttpRequestUpload
- 2Open and configure requests via open(), setRequestHeader(), timeout, withCredentials
- 3Send and abort the request with body support and upload progress
- 4Response properties: responseURL, status, statusText, response, responseText, responseXML
- 5Headers handling: getResponseHeader(), getAllResponseHeaders(), overrideMimeType()
- 6Headers/constants for readyState, and a defined set of events (loadstart, progress, abort, error, load, timeout, loadend, readystatechange)
- 7Support for different response types: '', 'arraybuffer', 'blob', 'document', 'json', 'text'
- 8Event targets and events: onloadstart, onprogress, onabort, onerror, onload, ontimeout, onloadend, onreadystatechange
Target Customer Industries
Competitive Advantages
- 1Standardized API across browsers as part of WHATWG Living Standard
- 2Comprehensive handling of request/response lifecycle including timeouts, headers, and credentials
- 3Rich event model for progress and state changes
- 4Supports multiple response types and MIME type handling
- 5Test coverage and open participation (GitHub, tests in web-platform-tests)
Key Benefits
Additional Product Information
Product Description
The XMLHttpRequest Standard defines an API that provides scripted client functionality for transferring data between a client and a server.
Target Market
Web developers building client-side web applications who need to perform HTTP requests
Unique Value Proposition
WHATWG-maintained living standard offering a consistent, feature-rich XMLHttpRequest API with broad browser support and ongoing updates.
Technical Requirements
Web platform API; exposed to Window, DedicatedWorker, and SharedWorker environments; uses a fetch-like controller for network requests; supports CORS and credentials mode.
Pricing Model
Not specified
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