Add casts to playlist in Scrimba.

scrimba.js

const fetch = require('node-fetch');

var scimbaList = [
	["cJkqwhd", "Import a Default Export"],
	["cnVnkhZ", "Create an Export Fallback with export default"],
	["cLDNvhP", "Use * to Import Everything from a File"],
	["cggGNub", "Use export to Reuse a Code Block"],
	["cBWq6T9", "Understand the Differences Between import and require"],
	["cWpbKHb", "Use getters and setters to Control Access to an Object"],
	["cG7W6T6", "Use class Syntax to Define a Constructor Function"],
	["cnV3yup", "Write Concise Declarative Functions with ES6"],
	["czgpKH3", "Write Concise Object Literal Declarations Using Simple Fields"],
	["cwLQ7Hn", "Create Strings using Template Literals"],
	["cwLQQSJ", "Use Destructuring Assignment to Pass an Object as a Function's"],
	["cV2rvCW", "Use Destructuring Assignment with the Rest Operator to Reassign Array"],
	["cWpWKhb", "Use Destructuring Assignment to Assign Variables from Arrays"],
	["cP4DMCZ", "Use Destructuring Assignment to Assign Variables from Nested"],
	["cnVZVHE", "Use Destructuring Assignment to Assign Variables from Objects"],
	["c96Pyuy", "Use the Spread Operator to Evaluate Arrays In-Place"],
	["c3JpMta", "Use the Rest Operator with Function Parameters"],
	["cm8LPAM", "Set Default Parameters for Your Functions"],
	["ck4L6T9", "Write Higher Order Arrow Functions"],
	["cnQLGf9", "Write Arrow Functions with Parameters"],
	["cZeLdsL", "Use Arrow Functions to Write Concise Anonymous Functions"],
	["cLe2ph6", "Prevent Object Mutation"],
	["c9yvPHR", "Mutate an Array Declared with const"],
	["cekLnAN", "Declare a Read-Only Variable with the const Keyword"],
	["cLez8TE", "Compare Scopes of the var and let Keywords"],
]
let playlistID = "p7v3gCd"
let scrimbas = "";
for (scrim of scimbaList.reverse()) {
	scrimbas += `"${scrim[0]}", `;
}
scrimbas = scrimbas.slice(0, -2)
addToPlaylist(playlistID, scrimbas);


function addToPlaylist(playlistID, scrimbas) {

	fetch("https://scrimba.com/rpc/playlistAddItems", {
	  credentials: "include",
	  headers: {
	    accept: "*/*",
	    "accept-language": "en-US,en;q=0.9",
	    "content-type": "application/json",
	    "scrimba-client-version": "dc5761ebaec4b0ca0e34"
	  },
	  referrer: "https://scrimba.com/ux7kQtZ",
	  referrerPolicy: "no-referrer-when-downgrade",
	  body:
	  '{"name":"playlistAddItems","args":["' + playlistID + '",[' + scrimbas + ']],"options":{}}',
	  method: "POST",
	  mode: "cors"
	}).
	then(response => {
		console.log(response);
	    if (response.ok) {
	      return response.json()
	    } else {
	      return Promise.reject('something went wrong!')
	    }
	  })
	  .then(data => console.log('data is', data))
	  .catch(error => console.log('error is', error));
}