cmd.join().split(',').map(function(v) {return parseInt(v,16);});

JSON.stringify()
括号里写变量

cmd.join().split(',').map(function(v) {return parseInt(v);});

var cmd = ["0x02,0x03,0xB4,0xB4,0x00,0x06","0x00,0x02,0x6E,0x00,0x00,0x05","0x01,0x01,0x00,0x78,0x00,0x05","0x03,0x03,0x82,0x96,0x00,0x05"];
var cmd1 = [];
// 转换为整数数组
cmd.forEach(function(d){
    d.split(",").forEach(function(d){
        cmd1.push(parseInt(d));
    })
});

// 打印输出16进制格式字符串
var output = "var cmd1=[";
cmd1.forEach(function(d,i){
    var _u = d.toString(16).toUpperCase();
    output += "0x"+ (_u.length<2 ? "0"+_u : _u);
    if(i!=cmd1.length-1) output+=",";
});
output += "]";
// 输出字符串：var cmd1=[0x02,0x03,0xB4,0xB4,0x00,0x06,0x00,0x02,0x6E,0x00,0x00,0x05,0x01,0x01,0x00,0x78,0x00,0x05,0x03,0x03,0x82,0x96,0x00,0x05]
console.log(output);