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-map/scan-until.min. Try it out:
const map = require('extra-map');
var x = new Map([['a', 1], ['b', 2], ['c', 3], ['d', 2]]);
map.scanUntil(x, v => v % 2 === 0);
map.scanUntil(x, v => v % 8 === 0);
- 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
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