//将字符串 转换成 Blob 对象

var blob = new Blob(["Hello World!"], {

    type: 'text/plain'

});

console.info(blob);

console.info(blob.slice(1, 3, 'text/plain'));

//将 TypeArray  转换成 Blob 对象

var array = new Uint16Array([97, 32, 72, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100, 33]);

//测试成功

//var blob = new Blob([array], { type: "application/octet-binary" });

//测试成功， 注意必须[]的包裹

var blob = new Blob([array]);

//将 Blob对象 读成字符串

var reader = new FileReader();

reader.readAsText(blob, 'utf-8');

reader.onload = function (e) {

    console.info(reader.result); //a Hello world!

}

var buffer = new ArrayBuffer(32);

var blob = new Blob([buffer]);       // 注意必须包裹[]

//将字符串转换成 Blob对象

var blob = new Blob(['中文字符串'], {

    type: 'text/plain'

});

//将Blob 对象转换成字符串

var reader = new FileReader();

reader.readAsText(blob, 'utf-8');

reader.onload = function (e) {

    console.info(reader.result);

}

//将字符串转换成 Blob对象

var blob = new Blob(['中文字符串'], {

    type: 'text/plain'

});

//将Blob 对象转换成 ArrayBuffer

var reader = new FileReader();

reader.readAsArrayBuffer(blob);

reader.onload = function (e) {

    console.info(reader.result); //ArrayBuffer {}

    //经常会遇到的异常 Uncaught RangeError: byte length of Int16Array should be a multiple of 2

    //var buf = new int16array(reader.result);

    //console.info(buf);

    //将 ArrayBufferView  转换成Blob

    var buf = new Uint8Array(reader.result);

    console.info(buf); //[228, 184, 173, 230, 150, 135, 229, 173, 151, 231, 172, 166, 228, 184, 178]

    reader.readAsText(new Blob([buf]), 'utf-8');

    reader.onload = function () {

        console.info(reader.result); //中文字符串

    };

    //将 ArrayBufferView  转换成Blob

    var buf = new DataView(reader.result);

    console.info(buf); //DataView {}

    reader.readAsText(new Blob([buf]), 'utf-8');

    reader.onload = function () {

        console.info(reader.result); //中文字符串

    };

}