Strip comments from Postman requests with Raw JSON body.

postman-pre-req-script.js

/**
 * What is this?
 * - If you try to comment stuff when requesting using a Raw JSON body,
 * you'll know that it will most likely fail, as the request is sent with your
 * comments bit included.
 * This script is supposed to intercept your request body and strip every comment
 * it has and then apply the sanitized body to the request, so you can comment
 * all you want inside Postman JSON request body.
 *
 * How to use it?
 * - Copy and paste this snippet into Postman's Pre-request Script
 */


const body = pm.request.body;
if (body.mode !== "raw" || !body.raw) {
    return;
}
const cleanBody = stripJSComments(body.raw);
pm.request.body.raw = cleanBody;


// ----------------------------------------------------------------------------------------
// Helpers
// ----------------------------------------------------------------------------------------
/**
 * Removes any JavaScript comments from the {@link serializedBody} text.
 * 
 * @param {string} serializedBody - Request body JSON as string
 */
function stripJSComments(serializedBody) {
    const literalValues = [];
    // Matches strings and temporarily replaces them with 'n###' so that
    // the next replace methods that are responsible to match comments, doesn't
    // match any literal value.
    // - These values are replaced back at the end. 
    //   - Notice that we use a number before the hashes. This is so that we can later
    //     track down the value that was in that place.
    let cleanSerializedBody = serializedBody.replace(/(['"`]).*?\1/gm, function(match) {
        const newLength = literalValues.push(match);
        const index = newLength - 1;
        return `${index}###`;
    });

    // Removes comments starting with //
    cleanSerializedBody = cleanSerializedBody.replace(/\/\/.*/gm, '');
    
    // Removes cooments starting with /* */
    cleanSerializedBody = cleanSerializedBody.replace(/\/\*[\s\S]*\*\//gm, '')

    // Removes comments starting with <!-- -->
    cleanSerializedBody = cleanSerializedBody.replace(/<!--[\s\S]*-->/gm, '');
  
    // Insert our literal values back
    cleanSerializedBody = cleanSerializedBody.replace(/\d+###/gm, function(match){
        const index = parseInt(match);
        if (index === NaN) {
            return '';
        }
        return literalValues[index];
    });

    // Return the clean, non-commented version of the body
    return cleanSerializedBody;
}