jpillora/xhook

Health v2 · maintenance only

Adoption not part of the score

1038 stars · 152 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

XHook is a small JavaScript library that patches XMLHttpRequest to let you intercept and modify AJAX requests and responses in the browser. It supports before/after hooks, fake responses for testing, header injection, and works alongside fetch, jQuery, Angular, and web workers.

Use cases

• intercept and modify xhr requests in the browser
• mock ajax responses for frontend testing
• add authentication headers to xhr requests
• cache ajax requests in localstorage
• simulate fake backend responses client-side
• log xhr error statistics to analytics

When to choose

• you need to transparently patch XMLHttpRequest across an existing codebase
• you want to fake or modify AJAX responses without a server
• you need to inject headers or rewrite requests in legacy XHR-based apps

When to avoid

• your code exclusively uses the fetch API instead of XMLHttpRequest
• you need full network-level interception in Node.js or service workers
• you want an actively developed library with ongoing feature work

Facets

library · maturity maintenance

http-client middleware mocking caching web-development frontend developer-tools testing browser xhr ajax request-interception response-mocking javascript web-server

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markdown · JSON · MCP: product_card(name="jpillora/xhook")