Regex Disallow A Character Unless Escaped

below is my regex to parse comma separated key-value pairs: function extractParams(str) { var result = {}; str.replace(/\s*([^=,]+)\s*=\s*([^,]*)\s*/g, function(_, a, b) {

Solution 1:

You can use this:

functionextractParams(str) {
    var result = {};
    str.replace(/\s*((?:\\[,\\=]|[^,\\=]*)+)\s*=\s*((?:\\[,\\=]|[^,\\=]*)+)\s*/g, function(_, a, b) { result[a.trim()] = b.trim(); });
    return result;
}

console.log(extractParams("arg1 = val\\,ue1 ,arg2 = valu\\=e2, arg3= val\\\\ue3"));

Solution 2:

I built a pattern that might not even need escaping \, commas to tell them apart.

If we can assume that your keys don't contain commas, unlike the values, as in:

ke y=,val,ue! is OK k,ey=val,ue is KO

Then the following pattern will work very well:

([^,]+)=(.+?)(?:(?=,[^,]+=)|$)

You can play with it here: https://regex101.com/r/RX4RsR/2