A promise
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class Bookshelf {
constructor() {
this.favoriteBooks = [];
}
addFavoriteBook(bookName) {
if (!bookName.includes("Great")) {
this.favoriteBooks.push(bookName);
}
}
printFavoriteBooks() {
console.log(`Favorite Books: ${String(this.favoriteBooks.length)}`);
for (let bookName of this.favoriteBooks) {
console.log(bookName);
}
}
}
let myShelf= new Bookshelf();
loadBooks(myShelf);
var BOOK_API = "https://some.url/api";
async function loadBooks(bookshelf) {
try {
const bookNames = await new Promise((resolve, reject) => {
fakeAjax(BOOK_API,resolve);
});
for (let bookName of bookNames) {
bookshelf.addFavoriteBook(bookName);
}
bookshelf.printFavoriteBooks();
} catch (error) {
console.error(error);
}
}
// ***********************
// NOTE: don't modify this function at all
function fakeAjax(url,cb) {
setTimeout(function fakeLoadingDelay(){
cb([
"A Song of Ice and Fire",
"The Great Gatsby",
"Crime & Punishment",
"Great Expectations",
"You Don't Know JS"
]);
},100);
}
JavaScript
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