const regex = /(?:[\[{,:\]}]+[\[{,:\]}\s]*"(*SKIP)(*FAIL)|"(?!\s*[\[{,:\]}]))/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?:[\\[{,:\\]}]+[\\[{,:\\]}\\s]*"(*SKIP)(*FAIL)|"(?!\\s*[\\[{,:\\]}]))', 'gm')
const str = `{"Equipment Contents":["XL APPEARANCE GROUP","body-color grille","body-color body-side molding with chrome insert","luggage rack","15" deep-dish cast aluminum wheels","P235/75R15SL all-terrain OWL tires","power door locks","power windows","p
ower mirrors","cloth captains chairs"]}`;
const subst = `\\$0`;
// 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