How do I add a code snippet with a number as a tabstop - visual-studio-code

Question

Consider the following JSON schema snippet:
{
"label": "New spell",
"description": "Creates a new spell",
"body": {
"name": "$1",
"source": "$2",
"page": "${3}",
"tradition": "$4",
"type": "${5|U,A|}",
"level": "${6}",
"description": ["$7"]
}
}
Both page and level need to be an integer (can default to 0), but also be a tabstop. I have tried a few things, but the only value that acts as a tabstop is enclosed in quotes, so it ends up being a string.
Is there a way to add a tabstop where the default value is a number?

Answer 1

This would work to set a tabstop 3 and 6 with defaults of 0. Note that the quotes must be escaped.
"\"page\": \"${3:0}\""
Also the general form of a snippet is as follows:
"new spell": {
"description": "Creates a new spell",
// "scope": "javascript,typescript",
"prefix": "new spell", // whatever prefix you want
"body": [ // array
"\"page\": \"${3:0}\"",
"\"level\": \"${6:0}\"",
]
}
There is no label property and there should be a prefix property. And body, if multiple statements is an array.

Answer 2

As it says in the documentation:
If a string starts with ^, the string content will be inserted as-is, not stringified. You can use this to specify snippets for numbers and booleans.
The value string needs to be specified as "^${3:0}".
So, the snippet fixed:
{
"label": "New spell",
"description": "Creates a new spell",
"body": {
"name": "$1",
"source": "$2",
"page": "^${3:0}",
"tradition": "$4",
"type": "${5|U,A|}",
"level": "^${6:0}",
"description": ["$7"]
}
}