json-strip-comments.js

// Remove comments from JSON with this JavaScript RegExp
// Only strips out /* */ style comments

const stripJsonRegExp = /(?=([^"\\]*(\\.|"([^"\\]*\\.)*[^"\\]*"))*[^"]*$)\/\*(.|\n)*?\*\/(?=([^"\\]*(\\.|"([^"\\]*\\.)*[^"\\]*"))*[^"]*$)/gm;

// Usage:

const commentedJson = String.raw`
/* test 1 */
{ /* test2 */
	/* test2 /* test2 */
	"item_b": "oh hi, \" /* test3 */", /* test6 */
	/* test3 */ "item_a": "/* test4 */"
	/* test5 */
    /*
    * multiline
    */
}
`;

const cleanJson = commentedJson.replace(stripJsonRegExp, '');
JSON.parse(cleanJson); // yay!