const regex = /(?:(?<=^)|(?<=,)) # start of line or comma
(?:(?!$)\s)* # skip whitespace
"? # skip opening quote mark
(
(?<=").*?(?=") # capture value in quotes
| # or
((?!,)\S)* # capture just value
)
"? # skip closing quote mark
(?:(?!$)\s)* # skip whitespace
(?=$|,) # command or the end of the line/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?:(?<=^)|(?<=,)) # start of line or comma
(?:(?!$)\\s)* # skip whitespace
"? # skip opening quote mark
(
(?<=").*?(?=") # capture value in quotes
| # or
((?!,)\\S)* # capture just value
)
"? # skip closing quote mark
(?:(?!$)\\s)* # skip whitespace
(?=$|,) # command or the end of the line', 'gm')
const str = ``;
const subst = `{\1}`;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions