例如"a".charCodeAt()为97，如果是"ba".charCodeAt()为98，默认第一位，即index为0；
"ba".charCodeAt(0)=98，而"ba".charCodeAt(1)为97
10进制转16进制:
如17的16进制
(17).toString(16)
=
"11"
合起来就是("a".charCodeAt()).toString(16)
=
"61"
嫌麻烦可以封装一个函数实现。
数字变字符:
String.fromCharCode(98)
=
"b"
js十六进制编码，怎么转换成可读字符串的编码如下:
var_0xc828=
"\x4D\x61\x63\x68\x69\x6E\x65\x43\x6F\x6F\x72\x64\x73"
"\x4D\x61\x63\x68\x69\x6E\x65\x49\x74\x65\x6D\x73"
"\x69\x64"
"\x63\x6C\x65\x61\x72"
"\x69\x73\x55\x73\x69\x6E\x67\x45\x6E\x65\x72\x67\x79"
"\x69\x73\x47\x65\x6E\x65\x72\x61\x74\x6F\x72"
"\x63\x6F\x6E\x76\x65\x72\x74\x45\x6E\x65\x72\x67\x79\x54\x6F\x46\x75\x65\x6C"
"\x67\x65\x74\x45\x6E\x65\x72\x67\x79\x53\x74\x6F\x72\x65\x64"
"\x65\x6E\x65\x72\x67\x79\x53\x74\x6F\x72\x65\x64"
"\x67\x65\x74\x4D\x61\x78\x45\x6E\x65\x72\x67\x79\x53\x74\x6F\x72\x65\x64"
"\x67\x65\x74\x45\x6E\x65\x72\x67\x79\x4F\x75\x74\x70\x75\x74"
"\x75\x73\x65\x45\x6E\x65\x72\x67\x79"
"\x74\x69\x63\x6B\x52\x65\x73\x65\x74\x54\x79\x70\x65"
"\x75\x70\x64\x61\x74\x65\x4D\x61\x63\x68\x69\x6E\x65\x54\x79\x70\x65"
"\x64\x69\x73\x61\x63\x74\x69\x76\x65"
"\x75\x70\x64\x61\x74\x65\x4D\x61\x63\x68\x69\x6E\x65"
"\x78"
"\x79"
"\x7A"
"\x67\x65\x74\x54\x69\x6D\x65"
"\x75\x70\x64\x61\x74\x65\x49\x74\x65\x6D"
"\x61\x64\x64\x49\x74\x65\x6D"
"\x64\x72\x6F\x70\x49\x74\x65\x6D"
"\x68\x6F\x6C\x64"
"\x70\x75\x73\x68"
"\x73\x61\x76\x65"
"\x72\x65\x61\x64"
"\x77\x72\x65\x6E\x63\x68\x43\x6C\x69\x63\x6B"
"\x67\x65\x74\x4D\x61\x63\x68\x69\x6E\x65\x4E\x61\x6D\x65"
"\x6D\x61\x63\x68\x69\x6E\x65"
"\x67\x65\x74\x49\x6E\x66\x6F"
"\x65"
"\x63\x6F\x75\x6E\x74"
"\x64\x61\x74\x61"
"\x67\x65\x74\x43\x6F\x6F\x72\x64\x73"
"\x67\x65\x74\x58"
"\x67\x65\x74\x59"
"\x67\x65\x74\x5A"
"\x69\x73\x45\x78\x69\x73\x74"
"\x67\x65\x74\x48\x65\x61\x6C\x74\x68"
"\x73.
根据具体问题类型，进行步骤拆解／原因原理分析／内容拓展等。
具体步骤如下：／导致这种情况的原因主要是……
