An example that shows the difference between creating a JavaScript class and subclass in ES5 and ES6.
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// ---------------------------------------------------------- | |
// A short snippet for detecting versions of IE in JavaScript | |
// without resorting to user-agent sniffing | |
// ---------------------------------------------------------- | |
// If you're not in IE (or IE version is less than 5) then: | |
// ie === undefined | |
// If you're in IE (>=5) then you can determine which version: | |
// ie === 7; // IE7 | |
// Thus, to detect IE: | |
// if (ie) {} |
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const longest = arr => arr.reduce((len, v) => Math.max(v.length, len), 0); |
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const bus = {}; | |
const get = e => (bus[e] = bus[e] || new Set()); | |
export const listeners = new Proxy(bus, { get }); | |
export const emit = (e, ...args) => listeners[e].forEach(fn => fn(...args)); |