CODEWITHSUNDEEP
asp.net-mvcasp.net-mvc-5asp.net-mvc-5.1
Ucf_Falcon
Ucf_Falcon

Reputation: 39

In MVC5 I am getting a cast error on my bootstrap bundle

I'm getting Unable to cast object of type 'Microsoft.Ajax.Utilities.CallNode' to type 'Microsoft.Ajax.Utilities.AstNodeList. on 

 @Scripts.Render("~/bundles/bootstrap")

This has to be something really stupid but I couldn't find it anywhere. Any ideas?

Upvotes: 0

Views: 1131

Answers (2)

znn
znn

Reputation: 501

I had the same error, fairly misleading.
In my case the issue was using JS template literals:

//this was breaking the minification
$(`#someId form input[data-sku=${this.getSku()}]`).val()

//this fixed it
$("#someId form input[data-sku=" + this.getSku() + "]").val()


//other examples that might break the minification:

//null propagation
hide = hide ?? true; //<-- this breaks
hide = hide ? hide : true; //<-- this fixes

//rgba syntax
someButton.css("color","rgb(255 0 0/ 50%)"); //<-- this breaks
someButton.css("color","rgba(255, 0, 0, 127)"); //<-- this fixes

//implicit object declaration
//this breaks
var data = { 
    originalItemKey,    
    alternativeSku
}; 
//this fixes
var data = {
    originalItemKey: originalItemKey,  
    alternativeSku: alternativeSku
}; 

//usage of "let" and "const" keyword might break at times, but not always. 
//In my case, it did happen that "some" usages of const and let did break the minification, therefore:
//IF this might break
let someVariable = "some value";

//this fixes
var someVariable = "some value";

//IF this might break
const someConst = "some const value";

//this fixes
var someConst = "some const value";

Apparently it's a known issue in Microsoft.Web.Optimization:
Microsoft.AspNet.Web.Optimization JavaScript bundling fails to minify template literals

Upvotes: 1

Venkatesan Rethinam
Venkatesan Rethinam

Reputation: 153

Check the scripts in the bundle. There must be a error in the script. Most probably the below error must be present

Instead of 

$("#myElement")

you might have typed

$("#
myElement")

Thanks, R. Venkatesan

Upvotes: 2

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