New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

(javascript)为什么通常在发送数据埋点请求的时候使用的是 1x1 像素的透明 gif 图片？ #20

Open

Zhengy1995 opened this issue Mar 13, 2020 · 0 comments

Owner

Zhengy1995 commented Mar 13, 2020

能够完成整个 HTTP 请求+响应（尽管不需要响应内容）
触发 GET 请求之后不需要获取和处理数据、服务器也不需要发送数据
跨域友好(img天生可以跨域访问)
执行过程无阻塞
相比 XMLHttpRequest 对象发送 GET 请求，性能上更好
GIF的最低合法体积最小（最小的BMP文件需要74个字节，PNG需要67个字节，而合法的GIF，只需要43个字节）

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment