Then add this line: function chgImg (imgField,newImg) { Here, you’re creating your first JavaScript function — a group of lines of code that you’ll use often.

Peter looks at how to call a JavaScript function from your TypeScript code and do it in a type-safe way. Along the way, he dramatically simplifies a Backbone application by integrating Knockout.

If you want to call Blazor .NET code from JavaScript (or vice versa) with instantiated objects, or while passing multiple parameters, or while catching the results produced by that code, here's how to ...