如何在JavaScript中用正则表达式引用所有变量名

Question

I have a string like this:

"xyz([x,3],x,[x,y],{y:1})" needs to be "xyz(['x',3],'x',['x','y'],{'y':1})"

Note : Variables can be in this case any letter from a to z

I need to replace variables like x, y and z with their quoted versions

In my test the comma is being captured by the regex, the problem is that if I capture x then y is not captured because of the intersecting comma.

var str = "xyz([x,3],x,[x,y],{y:1})"
str.replace(/(\W)([a-z])(\W)/g,"$1'$2'$3")
//output: mul(['x',3],'x',['x',y],{'y':1})

Added example: JSFiddle

Is there a way to specify the surrounding elements without capturing them?

Answer 1

This will replace the variable before comma or colon.

    var txt="xyz([x,3],x,[x,y],{y:1})";

    txt.replace(/[a-z]+[,:\])]/g, function f(x){
       return "'"+x.replace(/[,:\]\)]/g,"")+"'"+x[x.length-1];
   })

Answer 2

You are adding capture groups with that are creating issues. Remove them and use:

\W([a-z])\W

Here is a working version.

Update

Working with your js,

var original = "xyz([x,3],x,[x,y],{y:1})"
var replaced = original.replace(/([a-z])/g, "'$1'")

and I've updated the fiddle.