index.html:41 XMLHttpRequest cannot load file:///E:/myproject/datas/index.txt. Cross origin requests
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今天用vscode 编辑器view in browser ,出现ajax请求错误
index.html:41 XMLHttpRequest cannot load file:///E:/myproject/datas/index.txt. Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https, chrome-extension-resource.
原因：因为这里使用的是file协议，跨起源请求只支持协议方案：HTTP，数据，Chrome，Chrome扩展，HTTPS，Chrome扩展资源
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