Roughing out the demo app

node_modules/jju/lib/utils.js

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+var FS  = require('fs')
+var jju = require('../')
+
+// this function registers json5 extension, so you
+// can do `require("./config.json5")` kind of thing
+module.exports.register = function() {
+  var r = require, e = 'extensions'
+  r[e]['.json5'] = function(m, f) {
+    /*eslint no-sync:0*/
+    m.exports = jju.parse(FS.readFileSync(f, 'utf8'))
+  }
+}
+
+// this function monkey-patches JSON.parse, so it
+// will return an exact position of error in case
+// of parse failure
+module.exports.patch_JSON_parse = function() {
+  var _parse = JSON.parse
+  JSON.parse = function(text, rev) {
+    try {
+      return _parse(text, rev)
+    } catch(err) {
+      // this call should always throw
+      require('jju').parse(text, {
+        mode: 'json',
+        legacy: true,
+        reviver: rev,
+        reserved_keys: 'replace',
+        null_prototype: false,
+      })
+
+      // if it didn't throw, but original parser did,
+      // this is an error in this library and should be reported
+      throw err
+    }
+  }
+}
+
+// this function is an express/connect middleware
+// that accepts uploads in application/json5 format
+module.exports.middleware = function() {
+  return function(req, res, next) {
+    throw Error('this function is removed, use express-json5 instead')
+  }
+}
+