RegExp \ xdd metacharacter
JavaScript RegExp Object Definition and Usage
\ xdd metacharacters find a hexadecimal numberddpredetermined characters.
If no match is found, it returns null.
grammar
new RegExp("\xdd")
或者更简单方式：
/\xdd/
或者更简单方式：
/\xdd/
Browser Support
All major browsers support \ xdd metacharacter.
Examples
Examples
In a string of hexadecimal 57 (W) global search:
var str="Visit W3Cschool. Hello World!";
var patt1=/\x57/g;
var patt1=/\x57/g;
The marked text below shows where the expression gets a match:
Visit W 3Cschool. Hello W orld!
try it"
JavaScript RegExp Object