Q:

Visual studio code: replace char case while typing in snippet

I'm trying to write code-snippet for Visual Studio Code and TypeScript.  So far I managed to mirror typed word like this:
import { ${1:Name}Component } from './${1:name}.component';

When I type the word in place #1 it is mirrored to place #2 like this:
import { MynameComponent } from './Myname.component';

Is it possible to change snippet so the place #2 is in lower case like this:
import { MynameComponent } from './myname.component';

A:

The ability to transform snippets has been more recently added in vscode v.1.25.   In your case try this snippet:
"import components": {
    "prefix": "isml",
    "body": [
      "import { ${1/(.*)/$1Component } from '.\\/${1:/downcase}/}.component'",
    ],
    "description": "small"
  },

Trigger the prefix.   Then hit tab after you enter your component name (Myname in this example) and it will complete the snippet as you wanted. 
import { MynameComponent } from './myname.component';

