Custom types can also be defined inline.
Here is an example of a variable type:
const plane: { name: string, description: string} = { name: "Plane", description: "Something that flies"};
In this example, we have defined a custom shape. Any value assigned to the plane variable must have a name property of the string type, as well as a description property of the string type.
And here's another one for a function argument:
function foo(bar: { firstName: string, lastName: string}): void { console.log(`Hello ${bar.firstName}.. or should I call you Mr ${bar.lastName}?`);}foo({ firstName: "Sebastien", lastName: "Dubois"});
In this last example, we defined a foo function requiring a single bar argument with another custom inline ...
