[RE-OPEN]: Todomvc vue/src maps

[flashdesignory]

Re-opening for investigation and discussions.
This changes seems to have an impact on scores.

previous pr: #386

[rniwa]

So before this change, chunk-vendors.~.js looked like this:

(self.webpackChunktodomvc_vue = self.webpackChunktodomvc_vue || []).push([[998], {
    9662: function(e, t, n) {
        var r = n(614),
            o = n(6330),
            i = TypeError;
        e.exports = function(e) {
            if (r(e))
                return e;
            throw i(o(e) + " is not a function")
        }
    },
    9670: function(e, t, n) {
        var r = n(111),
            o = String,
            i = TypeError;
        e.exports = function(e) {
            if (r(e))
                return e;
            throw i(o(e) + " is not an object")
        }
    },
...

After the change, it looked like this instead:

(self.webpackChunktodomvc_vue = self.webpackChunktodomvc_vue || []).push([[998], {
    9662: function(module, __unused_webpack_exports, __webpack_require__) {
        eval("var isCallable = __webpack_require__(614);\nvar tryToString = __webpack_require__(6330);\n\nvar $TypeError = TypeError;\n\n// `Assert: IsCallable(argument) is true`\nmodule.exports = function (argument) {\n  if (isCallable(argument)) return argument;\n  throw $TypeError(tryToString(argument) + ' is not a function');\n};\n//# sourceURL=[module]\n//# sourceMappingURL=data:application/json;charset=utf-8;base64,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\n//# sourceURL=webpack-internal:///9662\n")
    },
    9670: function(module, __unused_webpack_exports, __webpack_require__) {
        eval("var isObject = __webpack_require__(111);\n\nvar $String = String;\nvar $TypeError = TypeError;\n\n// `Assert: Type(argument) is Object`\nmodule.exports = function (argument) {\n  if (isObject(argument)) return argument;\n  throw $TypeError($String(argument) + ' is not an object');\n};\n//# sourceURL=[module]\n//# sourceMappingURL=data:application/json;charset=utf-8;base64,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\n//# sourceURL=webpack-internal:///9670\n")
    },
...

[julienw]

Indeed the eval plugin isn't great for production, see https://webpack.js.org/configuration/devtool/

Not sure how to fix #385 but I wouldn't do it this way :/

[rniwa]

At this point, I think this issue is out of 3.0 release.