Javascript - Exporting an Imported Binding

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Introduction

To re-export a binding that you imported into the module, use an export statement: 

import { message } from "./moduleFile.js"; 
// some javascript code 
export message;

Here, we imported the binding message from moduleFile.js and again exported the same binding.

You can do this in one statement like this, 

export { multiply } from "./moduleFile.js";

You can re-export everything using the wildcard '*' like in the following example: 

export * from "./moduleFile.js";

Here, everything from moduleFile.js is exported out of the current module, including the default value.

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