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setUint8 Method (DataView)

Stores a Uint8 value at the specified byte offset from the start of the view.

dataView.setUint8(byteOffset, value); 


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


The value to set.

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

The following example shows how to set the first Uint8 in the DataView.

var req = new XMLHttpRequest();
    req.open('GET', "http://www.example.com");
    req.responseType = "arraybuffer";

    req.onreadystatechange = function () {
        if (req.readyState === 4) {
            var buffer = req.response;
            var dataView = new DataView(buffer);
            dataView.setUint8(0, 9);

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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