【JavaScript】String 转 ArrayBuffer

    function String2ArrayBuffer(str, cb) {
        var b = new Blob([str]);
        var f = new FileReader();
        f.onload = function(e) {
            cb(e.target.result);
        }
        f.readAsArrayBuffer(b);
    }

    String2ArrayBuffer('你好啊',function (buf) {
        var u8 = new Uint8Array(buf);
        console.log(u8);
    });