只读。获取此视图引用的 ArrayBuffer。 ## 语法 ~~~ var arrayBuffer = dataView.buffer; ~~~ 下面的示例演示如何在 DataView 下获取 ArrayBuffer 的长度。 ~~~ var req = new XMLHttpRequest(); req.open('GET', "http://www.example.com"); req.responseType = "arraybuffer"; req.send(); req.onreadystatechange = function () { if (req.readyState === 4) { var buffer = req.response; var dataView = new DataView(buffer); alert(dataView.buffer.byteLength) } } ~~~