export
Defination
The export statement is used to export functions, objects or primitives from a given file (or module).
Syntax
export { name1, name2, …, nameN };
export { variable1 as name1, variable2 as name2, …, nameN };
export let name1, name2, …, nameN; // also var
export let name1 = …, name2 = …, …, nameN; // also var, const
export default expression;
export default function (…) { … } // also class, function*
export default function name1(…) { … } // also class, function*
export { name1 as default, … };
export * from …;
export { name1, name2, …, nameN } from …;
export { import1 as name1, import2 as name2, …, nameN } from …;
Examples
// module "my-module.js"
function cube(x) {
return x * x * x;
}
const foo = Math.PI + Math.SQRT2;
export { cube, foo };
// module "my-module.js"
export default function cube(x) {
return x * x * x;
}
Usage
import React from 'react';
export const ADD_TODO = 'ADD_TODO';
export const addTodo = (content) => ({
type: actionType,
content
});
const App = () => {
return (
<div>
App
</div>
);
};
export default App;