PaulRosset

import UIKit
import WebKit

class ViewController: UIViewController, WKUIDelegate, WKScriptMessageHandler {
    var webView: WKWebView!

      func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
        print("Hello world")
      }
       

PaulRosset

function loadScript(src, { scriptId = '', insertBeforeAllTags = false } = {}) {
  return new Promise((resolve, reject) => {
    let script = document.createElement('script');
    script.id = scriptId;
    script.onload = resolve;
    script.onerror = event => {
      reject(new ExternalScriptError(event.target.src));
    };
    script.src = src;

PaulRosset

const videoSegments = new WeakMap()
let options = { id: "1234", timeStart: 1653831957378, size: 10000 }
const segment = { data: new Uint8Array(200) }

videoSegments.set(options, segment)
console.warn(videoSegments.get(options)) // { data: new Uint8Array(200) }

options = null
console.warn(videoSegments.has(options)) // false, the `options` key object is deleted from the WeakMap

PaulRosset

const results = await getPosts().catch((err) => {
  return {
    type: "error",
    message: err.message
  }
});
console.warn(results) // { type: "error", message: "cannot get posts from this endpoint" }

PaulRosset

const contacts = [
  { address: "20B Rue Lafayette", name: "work" },
  { address: "90B Rue laffite", name: "bar" }
];
const contact = contacts.find(contact => contact.name === "home")
console.warn(contact) // undefined

PaulRosset

const contactInfos = { address: "20B Rue Lafayette" };
function setAddress(infos) {
  infos.address = "90B Rue laffite";
}
console.warn(contactInfos); // { address: "20B Rue Lafayette" }
setAddress(contactInfos);
console.warn(contactInfos); // { address: "90B Rue laffite" }

PaulRosset

console.warn(true && "1") // "1"
console.warn(false && "1") // false

PaulRosset

const moreInfos = { info: "Please go to the desk." }
return {
  address: "20B Rue Lafayette",
  postcode: "75009",
  ...(moreInfos !== undefined && { moreInfos })
}

PaulRosset

const contactInfos = { address: "20B Rue Lafayette", addressNumber: 0 };
console.warn(contactInfos.addressNumber || undefined) // undefined
console.warn(contactInfos.addressNumber ?? undefined) // 0

PaulRosset

const contactInfos = { address: "20B Rue Lafayette" };
console.warn(contactInfos.user?.phoneNumber ?? "")
// ""