https://touralanya.com/DXR.axd?r=1_221-CPCBi

1(function() {
2var CheckingScriptObjectCommand = ASPx.CreateClass(null, {
3 constructor: function(scriptName, markerObjectName) {
4  this.scriptName = scriptName;
5  this.markerObjectName = markerObjectName;
6  this.isExisted = false;
7 },
8 Run: function() {
9  var markerObj = this.GetMarkerObject();
10  this.isExisted = !!markerObj;
11  if(this.isExisted)
12   markerObj.DXPatched = true;
13 },
14 GetErrorMessage: function() {
15  return this.GetErrorMessageCore(true);
16 },
17 GetErrorMessageCore: function(isScriptRequired){
18  var markerObj = this.GetMarkerObject();
19  if(this.isExisted && markerObj && markerObj.DXPatched || !isScriptRequired && !markerObj)
20   return null;
21  if(isScriptRequired && !this.GetMarkerObject()){
22   if(this.isExisted)
23    return this.scriptName + " script was attached but has been overridden.";
24   else
25    return this.scriptName + " script was not attached.";
26  }
27  if(!this.isExisted)
28   return this.scriptName + " script was attached after DevExpress scripts.";
29  return this.scriptName + " script was attached multiple times and mixed up with DevExpress scripts.";
30 },
31 GetMarkerObject: function() {
32  return ASPx.GetGlobalObject(this.markerObjectName);
33 }
34});
35var PatchScriptCommand = ASPx.CreateClass(CheckingScriptObjectCommand, {
36 constructor: function(scriptName, markerObjectName, patchMethod, required) {
37  this.constructor.prototype.constructor.call(this, scriptName, markerObjectName);
38  this.required = required;
39  this.patchMethod = patchMethod;
40 },
41 Run: function() {
42  CheckingScriptObjectCommand.prototype.Run.call(this);
43  if(this.isExisted)
44   this.patchMethod();
45 },
46 GetErrorMessage: function() {  
47  return this.GetErrorMessageCore(this.required);
48 }
49});

50var ExternalScriptProcessor = ASPx.CreateClass(null, {
51 constructor: function() {
52  this.commands = {};
53 },
54 Process: function(scriptName, markerObjectName, patchMethod, required) {
55  var newCommand = this.CreateCommand(scriptName, markerObjectName, patchMethod, !!required);
56  var oldCommand = this.commands[markerObjectName];
57  if(oldCommand) {
58   if(!oldCommand.patchMethod && !newCommand.patchMethod)
59    newCommand = null;
60   else if(newCommand.patchMethod && (!oldCommand.patchMethod || oldCommand.required))
61    newCommand.required = true;
62   else if(oldCommand.patchMethod && !newCommand.patchMethod) {
63    oldCommand.required = true;
64    newCommand = null;
65   }
66  }
67  if(newCommand) {
68   this.commands[markerObjectName] = newCommand;
69   newCommand.Run();
70  }
71 },
72 CreateCommand: function(scriptName, markerObjectName, patchMethod, required) {
73  if(patchMethod)
74   return new PatchScriptCommand(scriptName, markerObjectName, patchMethod, required);
75  return new CheckingScriptObjectCommand(scriptName, markerObjectName);
76 },
77 ShowErrorMessages: function() {
78  var messages = this.GetErrorMessages();
79  var console = window.console;
80  if(!messages.length || !console || !ASPx.IsFunction(console.error))
81   return;
82  for(var i = 0; i < messages.length; i++) {
83   console.error(messages[i]);
84  }
85  ASPx.ShowKBErrorMessage("Please check the correctness of script registration on the page. For details, see ", "T272309");
86 },
87 GetErrorMessages: function() {
88  var messages = [];
89  for (var key in this.commands) {
90   if (this.commands.hasOwnProperty(key)) {
91    var message = this.commands[key].GetErrorMessage();
92    if (message)
93     messages.push(message);
94   }
95  }
96  return messages;
97 }
98});
99ExternalScriptProcessor.Instance = null;
100ExternalScriptProcessor.getInstance = function() {
101 if(!ExternalScriptProcessor.Instance)
102  ExternalScriptProcessor.Instance = new ExternalScriptProcessor();
103 return ExternalScriptProcessor.Instance;
104};
105ASPx.ExternalScriptProcessor = ExternalScriptProcessor;
106})();