@diax-js/context v0.2.0

@diax-js/context

This package is core for all functionalities implemented by @diax-js. The main idea of this package is to provide implementation of interface Context and helper functions to work with.

How to use

Type in your console:

npm i @diax-js/context

Basic usage of context:

const context = ...;

useContext(context, () => {...});

But for diax-js better is use functions like:

useDocument(() => {...});

useElement(element, () => {...});

Context concept

Context is an entity that could be pass as free variable thought synchronous functions stack. For instance, while some function f() is invoked, it can build a example call stack:

    f -> g -> h -> ... -> n

Passing data form outermost function f to the bottom n may be inconvenient. Just sometimes we need to pass data from f to n that are not relevant for functions between. So idea of the Context is to create object that could be shared between differed functions and let pass data between them in more scalable manner. The visualization of this concept is code below.

    function f() {
        const context = getCurrentContext();
        context.hello = "Hello";
        g();
    }

    function g() {
        const context = getCurrentContext();
        console.log(context.hello);
    }

    useContext(context, () => {
        f(); // will log "Hello" in the console.
    })

@diax-js usage of context

@diax-js is designed to build web components so Context is base concept for dependency sharing system or dependency injection system. But could be used to build more features in the future.