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- javascript AJAX请求如何发送_如何解决跨域问题?
- fetch是现代浏览器中替代XMLHttpRequest的首选,返回Promise且语法简洁,但默认不携带cookie、不自动拒绝非2xx响应,需手动检查response.ok、设置credentials:‘include’、指定Content-Type,并自行封装超时;CORS错误源于浏览器预检拦截,需确认请求是否触发OPTIONS、响应头是否正确配置Access-Control-Allow-Origin;开发期可用Vite/Webpack代理绕过跨域,上线需Nginx或后端配合;JSONP已
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