ES6 specification allows to combine default imports with namespace/named imports.
Exporting:
export default function doSomethingByDefault(){...} //default export
export function run1(){....} //named export
export function run2(){....} //named export
Importing with combined default and namespace features:
import defaultFeature, * as runner from "<module-name>"
....
Importing with combined default and named features (local aliases can optionally be used) :
import defaultFeature, {run1 as exec, run2} from "<module-name>"
...
The default import must be declared first. Also the three; default, namespace and named imports cannot be mixed at a time.
Example
js/lib.jsexport default function showFunctionNames(){
console.log("use functions: showSquare, showSum and ShowSquareRoot");
}
export function showSquare(num) {
show(num * num);
}
export function showSum(x, y) {
show(x + y);
}
export function showSquareRoot(x){
show(Math.sqrt(x));
}
function show(result) {
console.log(result);
}
import help, {showSquare as sq, showSquareRoot} from "./lib.js";
sq(2);
showSquareRoot(2);
help()
index.html<html>
<script type="module" src="./js/app.js"></script>
<body>
</body>
</html>
Output
To try examples, run http-server from project root:
$ http-server On loading index.html, we have following output:
4
1.4142135623730951
use functions: showSquare, showSum and ShowSquareRoot
Example ProjectDependencies and Technologies Used: - Node.js v8.11.3
- Google Chrome Browser Version 70.0.3538.102 (Official Build) (64-bit)
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