Unable to see comments in javascript files generated by TypeScript

问题

I have created a TypeScript(.ts) file. Which upon save generates a minified JavScript file and a normal(readable) JavaScript file. All this works fine. But the comments I have added is TypeScript file is not visible in auto-generated JavaScript file. Since you cannot debug a TypeScript file (to add breakpoint, one need to use JavaScript file) and comments are not available in JavaScript file, I have to switch between .TS file and .JS file while debugging. Is there way to tell TypeScript, not to remove the comments user have added?

回答1:

If you have WebEssentials installed, you can set this in the WebEssentials Options:

If you do not have WebEssentials installed, stop what you are doing and go install it first from NuGet. This is a great extension that will add all kinds of helpful features for web development.

回答2:

Pass the --comments switch on the command-line to preserve comments.

回答3:

0.8.2.0

If you created a TypeScript project with version 0.8.2.0 of the TypeScript Visual Studio extension (the latest version), you'll find there is an option in the project file for this:

  <PropertyGroup Condition="'$(Configuration)' == 'Release'">
    <TypeScriptTarget>ES3</TypeScriptTarget>
    <TypeScriptIncludeComments>false</TypeScriptIncludeComments>
    <TypeScriptSourceMap>false</TypeScriptSourceMap>
  </PropertyGroup>

By default it is false, but you can just switch it to true:

<TypeScriptIncludeComments>true</TypeScriptIncludeComments>

To edit this setting, you need to right-click on the project and select "Unload", then right-click on it again and hit "Edit". These settings are at the bottom of the file you will edit.

When you have changed the setting, right-click on the project again and hit "Re-load" and you'll be up and running again.

Previous Versions

In previous versions (if you created the project in a previous version, if you later updated to 0.8.2.0), you'll have to fiddle with the command, but the process is almost the same.

<Exec Command="&quot;$(PROGRAMFILES)\Microsoft SDKs\TypeScript\tsc&quot;  @(TypeScriptCompile ->'&quot;%(fullpath)&quot;', ' ')" />

Change it to this:

<Exec Command="&quot;$(PROGRAMFILES)\Microsoft SDKs\TypeScript\tsc&quot; --comments @(TypeScriptCompile ->'&quot;%(fullpath)&quot;', ' ')" />

Once again, to edit this setting, you need to right-click on the project and select "Unload", then right-click on it again and hit "Edit". These settings are at the bottom of the file you will edit.

When you have changed the setting, right-click on the project again and hit "Re-load" and you'll be up and running again.

来源：https://stackoverflow.com/questions/14639559/unable-to-see-comments-in-javascript-files-generated-by-typescript