Jacob Stein (18) [Avatar] Offline
I have noticed about 15 typos along with code style inconsistencies in the first 5 chapters. I recommend also checking all the diagrams, as commas are needed in multiple places. On figure 5.8 you have "return Content("The URL is {url}");, you need a $ for string interpolation. Additionally, in some of the earlier chapters you refer to HTML in both lower and uppercase, the same is with URL. In a demonstration (image) you even have it lowercase! I'm enjoying the book, but I seriously hope these issues are corrected, as editors aren't always looking at the technical side of things.
Jacob Stein (18) [Avatar] Offline
I found 2 more examples just by reading a few paragraphs of the live book: "{controller}/{action/{code}" around https://livebook.manning.com/#!/book/asp-dot-net-core-in-action/chapter-5/v-11/260, alone with punctuation for the sentence being inside the code block.
Jacob Stein (18) [Avatar] Offline
Around 5 in chapter 6:
"In the previous chapter, I showed you how to define a route with parameters – perhaps for the day in a calendar or the unique id for a product page. But say a user requests a given product page – what then? Similarly, what if the request includes data from a form, to change the name of the product for example? How do you handle that request, and access the values the user provided?"

ID should be capital.
Jacob Stein (18) [Avatar] Offline
Figure 6.1 is also missing (...); on line 7.
Jacob Stein (18) [Avatar] Offline
Not JavaScript, https://gyazo.com/97071f8041ea1f9511080240bea790ae . smilie Figure 7.1, the else.
Jacob Stein (18) [Avatar] Offline
Also figure 7.1, "renderedto."
Jacob Stein (18) [Avatar] Offline
Around 283 on Chapter 7, "(Asychronous Javascript and XML)," should be JavaScript.
Jacob Stein (18) [Avatar] Offline
Chapter 8, around 59, "nut shell" should be "nutshell."
Jacob Stein (18) [Avatar] Offline
Jacob Stein (18) [Avatar] Offline
Chapter 12:
"There are a number of ways to tackle this, such as scripting the .NET CLI, applying migrations in your app’s startup code, or using a custom tool. Each approach has there pros and cons." Should be "their."
Andrew Lock (51) [Avatar] Offline

Thanks for these, I'll make sure they get fixed in the copyedit process

Jacob Stein (18) [Avatar] Offline
Thanks, you also have Main in lowercase in Chapter 15. I take it you write Java?
Andrew Lock (51) [Avatar] Offline
Haha, not for many years smilie

I can't find that reference to Main - though I know I fixed one previously, so hopefully I already caught it.

Thanks for the diligent eye smilie

Jacob Stein (18) [Avatar] Offline
Jacob Stein (18) [Avatar] Offline
I'm not really sure what's going on here either:
"<environment exclude="Development">
<link rel="stylesheet" href="https://ajax.aspnetcdn.com/ajax/<!--#A-->
[CA] bootstrap/3.3.7/css/bootstrap.min.css" <!--#A-->
asp-fallback-test-class="sr-only" <!--#C-->
asp-fallback-test-property="position" <!--#D-->
asp-fallback-test-value="absolute" /> <!--#D-->
<link rel="stylesheet" href="~/css/site.min.css" />

It's quite annoying, as the comments on Razor pages don't work in the web version. I don't think you mean to be loading ajax as a stylesheet though. I kind of see how the <!--#A--> plays into it, and I assume the [CA] is part of that too. The problem is without comments it's difficult to tell what things do.
Andrew Lock (51) [Avatar] Offline
The formatting is unfortunate, and is due to the line-size limitation in a book. It's also unfortunate the comments aren't parsed correctly by the online version.

The [CA] means there was a word wrap, so this is the code block (unwrapped)

<environment exclude="Development"> 
<link rel="stylesheet" href="https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.7/css/bootstrap.min.css"
    asp-fallback-test-value="absolute" /> 
<link rel="stylesheet" href="~/css/site.min.css" /> 

Hopefully that makes a bit more sense!