Tool to transpile from js to jsx

Question

I'm curious if any of the transpiling tools will convert from plain JS to JSX. Babel will transpile JSX to JS, but as far as I know it cannot go back to JSX.

From the example:

var Nav;
// Input (JSX):
var app = <Nav color="blue" />;
// Output (JS):
var app = React.createElement(Nav, {color:"blue"});

Are there tools that go the other direction:

var Nav;
// Input (JS):
var app = React.createElement(Nav, {color:"blue"});
// Output (JSX):
var app = <Nav color="blue" />;

Thanks!

Solution

I haven't tried it myself, but there is apparently now a babel plugin to do exactly what you ask.

babel-js-to-jsx

https://github.com/JoeStanton/babel-js-to-jsx

Per the documentation:

Babel 6 plugin to convert from desugared React.DOM CallExpressions -> the equivalent JSX. Currently used to migrate to ES6+ from other compile to JS languages.

It can be used as a plugin:

require("babel-core").transform(code, {
  plugins: ["js-to-jsx", "syntax-jsx"],
}).code

Or from the command line for composition with other tools:

npm install babel-plugin-js-to-jsx
cat example.ls | lsc -cb --no-header | js-to-jsx | esformatter -c format.json