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getFloat64 Method (DataView)


Gets the Float64 value at the specified byte offset from the start of the view. There is no alignment constraint; multi-byte values may be fetched from any offset.

var testFloat = dataView.getFloat64(byteOffset, littleEndian); 


Required. The Float64 value that is returned from the method.


The place in the buffer at which the value should be retrieved.


Optional. If false or undefined, a big-endian value should be read, otherwise a little-endian value should be read.

These methods raise an exception if they would read beyond the end of the view.

The following example shows how to get the first Float64 in the DataView.

var req = new XMLHttpRequest();'GET', "");
    req.responseType = "arraybuffer";

    req.onreadystatechange = function () {
        if (req.readyState === 4) {
            var buffer = req.response;
            var dataView = new DataView(buffer);


Supported in the following document modes: Internet Explorer 10 standards and Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

Not supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards.

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