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[总结]跨域 #20

@duyue6002

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@duyue6002

跨域的重要概念

  1. 同源:同协议、同域、同端口
  2. 限制:Ajax无法发送;无法获取DOM;无法获取cookie/localStorage/indexDB
  3. 不受跨域限制的元素:WebSocket,script、img、iframe、video、audio标签的src属性等
  4. 方法:proxy;cors;jsonp

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