跨域問題Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin
場景：前端跟後臺聯合開發的時候，在局域網內，瀏覽器訪問別人的地址能夠獲取數據，可是經過接口請求，就會跨域前端 解決方法：如今是vue項目，用axios請求，前端這邊單獨解決這個問題，不須要後端處理vue 第1、找到config/index.jsios 設置proxyTable，實際上就是設置代理路徑（PS:設置config文件以後，須要從新npm run dev）npm dev:
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- 1. Response to preflight request doesn't pass access control check
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