JavaScript Snippet – parseJSONC()
source link: https://cwestblog.com/2022/02/05/javascript-snippet-parse-jsonc/
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Last year I needed a way to be able to parse JSON with comments (also known as JSONC). With that in mind I wrote the following short solution which will essentially remove JavaScript-style comments and trailing commas from the specified JSONC string and then the native JSON.parse() function will parse the remaining string:
var parseJSONC = (function() { /** * @license Copyright 2021 - Chris West - MIT Licensed * @see https://gist.github.com/westc/32ae8971284b21dbc656926e7e210f5b * * Converts a JSONC (JSON with comments) to a JavaScript value. Allows for * trailing commas. * @param {string} code * The JSONC string that will be parsed and converted to a JS value. * @param {?(function(this:(Object|Array),string,any): any)=} reviver * If a function, this prescribes how the value originally produced by * parsing is transformed, before being returned. * @returns {*} * Returns the JS equivalent of the JSONC code that is given. */ function parseJSONC(code, reviver) { return JSON.parse( code.replace( /("(?:[^"\\]+|\\.)*")|\/\/[^\r\n]*|\/\*[^]*?\*\//g, get2ndOrSpaces ).replace( /("([^"\\]+|\\.)*")|,\s*(?=[\}\]])/g, get2ndOrSpaces ), reviver ); }
function get2ndOrSpaces(match, string) { return string || match.replace(/\S/g, ' '); } return parseJSONC; })();
Feel free to try this parseJSONC() function out yourself and let me know what you think. As always, happy coding! 
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