Javascript \x 反斜槓x 16進制 編解碼

js 裏 \x 開頭的通常是16進制編碼的數據，下面代碼實現編解碼：

解碼

1. function decode(str){

2. return str.replace(/\\x(\w{2})/g,function(_,$1){ return String.fromCharCode(parseInt($1,16)) });

3. }

eg.

decode('\x5f\x63\x68\x61\x6e\x67\x65\x49\x74\x65\x6d\x43\x72\x6f\x73\x73\x4c\x61\x79\x65\x72')

"_changeItemCrossLayer"

編碼

1. function encode(str){

2. return str.replace(/(\w)/g,function(_,$1){ return "\\x"+ $1.charCodeAt(0).toString(16) });

3. }

eg.

encode("_changeItemCrossLayer")

"\x5f\x63\x68\x61\x6e\x67\x65\x49\x74\x65\x6d\x43\x72\x6f\x73\x73\x4c\x61\x79\x65\x72"