PropDefinition

By defining a wildcard property like "*" on the prototype, this will supply a default behavior for every property. The default wildcard "*" definition makes every property run through the "observable" types converter. It looks like:

"*": {
  type: "observable"
}

The following defaults every property to be a number:

import {DefineMap} from "can";

const AllNumbers = DefineMap.extend({
  "*": {type: "number"},
  age: {},
  count: {}
});

const someNumbers = new AllNumbers({
  age: "22",
  count: "23",
  version: "24"     
});

console.log( someNumbers.serialize() ) //-> {
//   age: 22,
//   count: 23,
//   version: 24
// }

Setting the wildcard is useful when every property on a map instance should behave in a particular way. For example, for map types used with can-route:

const MyMap = DefineMap.extend({
  "*": {
    type: "stringOrObservable"
  }
});

Or if you want to turn off implicit conversion of Objects and Arrays to DefineMap and DefineLists:

const MyMap = DefineMap.extend({
  "*": {
    type: "any"
  }
});