RunKit + 
Try any Node.js package right in your browser
This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including @extra-entries/flat. Try it out:
const entries = require("extra-entries");
var x = [
["ab", [["a", 1], ["b", 2]]],
["cde", [["c", 3], ["de", [["d", 4], ["e", [["e", 5]]]]]]]
];
[...entries.flat(x)];
[...entries.flat(x, 1)];
[...entries.flat(x, 2)];
- all documents on RunKit are public
require()any package directly from npm- use arrow functions, classes, template strings, and most of ES6
awaitany promise instead of using callbacks (example)- create your own embedded node.js snippets
This service is provided by RunKit and is not affiliated with npm, Inc or the package authors.