How can i create a VSCode plugin that enhances type detection in javascript code?

My current project has some last struggled with regards to type detection. And since there is no plugin that fits my needs i'm thinking about creating one. I know visual studio code plugins can do a lot of interesting things. I'm using javascript to render HTML code, such a snippet looks like this:

class TestComponent extends ComponentBase
{
 /** @type { SomePropertyType } */ someProperty;

 render(){
  return html`
    <my-component .complex-attribute="${this.someProperty}"></my-component>
`;
 }
}

class MyComponent extends ComponentBase
{
 /** @type { ComplexType } */ complexAttribute;
}

now i want to write a VSCode plugin that forces the IDE to:

• detect that the complex-attribute is of type "ComplexType"
• that you can click on complex-attribute to be navigated to the line where the property is defined
• that, if the type you pass to the attribute is not any and not "ComplexType" i will get a compiler error
• that if the type is any, it will be implicitly converted into "ComplexType"

is this possible? and if yes how can i even get started doing that?

again to clarify: this is not about javascript type checking. this is about parsing a string you prompt using javascript and adding specific types to parts of it.