ES6 support

[bbello25]

Is it planned to add ES6 support? I am not sure if this is issue for this repo because source problem is AjaxMin library. But maybe it would be fine to put supported JavaScript standard to documentation.

[christiango]

Thanks for logging the issue here, we are indeed blocked on ajaxmin here. Feel free to submit a PR to update the readme with any clarifications you might have found helpful during your investigation!

[bbello25]

Not sure if it is worth updating readme. But I was struggling when I tried to use library for parsing angular 6 code with tsconfig target set to ES6. When I changed it to ES5 it worked fine.

[anthonn]

I have the same problem with angular, now running version 7.
I would greately appreciate if it could be used with ES6.

[anthonn]

If anyone like me used sourcemap-toolkit for parsing minified stacktraces with net core I found a workaround for parsing es6 stacktraces.

net core can easily use node.js for executing javascript, and there are some good npm packages for parsing javascript sourcemaps.

Add this to ConfigureServices
services.AddNodeServices();

Then the files:

package.json

{
  "name": "app_name",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {},
  "private": true,
  "dependencies": {
    "error-stack-parser": "2.0.6",
    "stacktrace-gps": "3.0.4"
  },
  "devDependencies": {}
}

parse-stacktrace.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var errorStackParser = require("error-stack-parser");

module.exports = function (callback, stacktrace) {
    var error = new Error(stacktrace);
    error.stack = stacktrace;
    var errorsParsed = errorStackParser.parse(error);
    callback(null, errorsParsed);
};

deminify-stacktrace.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });

var sourceMap = require("source-map");

module.exports = function (callback, stackFrames, sourceMapCacheArg) {
    var sourceMapConsumerCache = new Object();

    for (let prop in sourceMapCacheArg) {
        if (sourceMapCacheArg.hasOwnProperty(prop))
            sourceMapConsumerCache[prop] = new sourceMap.SourceMapConsumer(sourceMapCacheArg[prop]);
    }

    var newFrames = new Array(stackFrames.length);
    var frameResolved = 0;
    stackFrames.forEach(function (stackFrame, i) {
        const srcMap = sourceMapConsumerCache[stackFrame.fileName + ".map"];
        const srcOriginalPosition = srcMap.originalPositionFor({ line: stackFrame.lineNumber, column: stackFrame.columnNumber });

        const originalCode = srcMap.sourceContentFor(srcOriginalPosition.source, true);
        var lineText;
        if (originalCode) {
            const lines = originalCode.split(/\r\n|\n/);
            lineText = lines[srcOriginalPosition.line - 1];
        } else {
            lineText = null;
        }

        newFrames[i] = {
            lineNumber: srcOriginalPosition.line,
            columnNumber: srcOriginalPosition.column,
            fileName: srcOriginalPosition.source,
            lineText: lineText,
            origFunctionName: stackFrame.functionName
        };


        if (++frameResolved === stackFrames.length) {
            callback(null, newFrames);
        }
    });
};

From C# call the javascript code

// Get the stackframes: http://www.stacktracejs.com/#!/docs/error-stack-parser
var stackFrames = await _nodeServices.InvokeAsync<JArray>("path_to_script_folder/parse-error", stacktrace);
var fileNames = stackFrames.Select(x => x.Value<string>("fileName")).Where(x => !string.IsNullOrWhiteSpace(x)).Distinct().ToList();

// Retrieve the js sourcemap files. key: filename, value: filecontent
Dictionary<string, string> sourceMapDict = await GetFileContent(fileNames.Select(x => $"{x}.map").ToList());
var sourceMaps = JObject.FromObject(sourceMapDict);

var deminifedStackFrames = await _nodeServices.InvokeAsync<JArray>("path_to_script_folder/deminify-stacktrace", stackFrames,  sourceMaps);

I know the code could probably be improved some, but hopefully it helps some with the same issue as me.
It is required to have node.js installed on the machine this code will run.