[英]Access to fetch at 'https://randomuser.me/api/?results=4' from origin 'http://localhost:3000' has been blocked by CORS policy:
我一直在我的控制台中得到这个，我不明白，请有人帮我解释一下。 Access to fetch at ' https://randomuser.me/api/?results=4 ' from origin ' http://localhost:3000 ' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is出现在请求的资源上。 如果不透明的响应满足您的需求，请将请求的模式设置为“no-cors”以获取禁用 CORS 的资源。
在您的 api 域https://randomuser.me中，将localhost添加到允许的来源列表中。
您收到此错误的原因是因为https://randomuser.me期望来自原点https://randomuser.me的请求，而不是来自其他来源的请求，例如来自您的localhost 。 如果不满足此要求，浏览器会将其作为警告/错误返回。
为了能够在反应应用程序中允许 API 代理 - 您需要使用以下内容编辑 package.json
"proxy": "https://randomuser.me",
更多细节可以在 create-react-dev 文档中找到
CORS 策略已阻止从源“http://localhost:3000”访问“https://localhost:7144/api/employees”
[英]Access to fetch at 'https://localhost:7144/api/employees' from origin 'http://localhost:3000' has been blocked by CORS policy
CORS 策略已阻止访问从源“http://localhost:3000”获取
[英]Access to fetch at from origin 'http://localhost:3000' has been blocked by CORS policy
ReactJs 中的 CORS 政策阻止了从来源“http://localhost:3000”访问“http://example.com/myApi”
[英]Access to fetch at 'http://example.com/myApi' from origin 'http://localhost:3000' has been blocked by CORS policy in ReactJs
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[英]Access to fetch at 'https://www.cloudflare.com/cdn-cgi/trace' from origin 'http://localhost:3000' has been blocked by CORS policy
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[英]Access to fetch at 'https://localhost:44395' from origin 'null' has been blocked by CORS policy
CORS 策略已阻止从源“localhost:3000”访问“...”处的 XMLHttpRequest
[英]Access to XMLHttpRequest at '…' from origin 'localhost:3000' has been blocked by CORS policy
原点 http://localhost:3000 已被 CORS 政策阻止：我的反应应用程序中的 Access-Control-Allow-Origin
[英]origin http://localhost:3000 has been blocked by CORS policy: The Access-Control-Allow-Origin In my react App
CORS 策略已阻止在 localhost:3000 访问 XMLHttpRequest
[英]Access to XMLHttpRequest at localhost:3000 from origin has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header
如何修复“http://localhost:3000”已被 CORS 策略阻止：请求的资源上不存在“Access-Control-Allow-Origin”header。
[英]How to fix ''http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.'
CORS 策略已阻止从源“http://...”访问“...”处的 XMLHttpRequest
[英]Access to XMLHttpRequest at '...' from origin 'http://...' has been blocked by CORS policy
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