Lecture
In Webpack, if you want to keep a value between calls to a module, you cannot store it directly in the module scope, because every time the module is imported it creates a new module instance and the local variables are reset. However, you can use a separate module to store and manage shared state, or use other techniques to persist values across module calls.
Here are a few approaches for achieving this:
First approach
Use a separate module for state. You can create a dedicated module to store and manage shared state. This state module can export functions for getting, setting or changing values, which lets you share data between different modules.
// state.js
let sharedValue = null;
export function setSharedValue(value) {
sharedValue = value;
}
export function getSharedValue() {
return sharedValue;
}
// Module A
import { setSharedValue, getSharedValue } from './state.js';
setSharedValue('Hello, World');
// Module B
import { getSharedValue } from './state.js';
console.log(getSharedValue()); // 'Hello, World'
Second approach
Use a config object: you can create a configuration object holding the shared values and import that configuration object into the modules where you need access to the shared values.
// config.js
export const config = {
sharedValue: null,
};
// Module A
import { config } from './config.js';
config.sharedValue = 'Hello, World';
// Module B
import { config } from './config.js';
console.log(config.sharedValue); // 'Hello, World'
third approach
Yes, you can also use the window object to create a global variable for storing and sharing values between different modules in a browser environment. Here is how you can do it
In one module (for example, Module A):
// Module A window.sharedValue = 'Hello, World'; In another module (for example, Module B):
// Module B console.log(window.sharedValue); // 'Hello, World'
By assigning a value to window.sharedValuein
It is generally good practice to encapsulate shared data and functions in dedicated modules, or to use a state management solution when building larger and more complex applications. This can
These approaches let you keep shared values across module calls in Webpack. Be careful when using shared state, so as to avoid potential problems with state management and synchronisation. Depending on your particular use case, you may want to look into more advanced state management solutions such as Redux or Mobx for larger applications.
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