I am newbie to JavaScript. Here’s the sample code. let options = { title: "Menu", width: 100, height: 200 }; console.log(options.title); let {title, width, height} = { options:title, options:width, options:height}; // clause 1 I am getting Uncaught ReferenceError: Cannot access ‘title’ before initialization on clause 1. Why? The object options is initialized and hence i… Read More JavaScript: Getting a Uncaught ReferenceError: Cannot access 'title' before initialization

This is apparently a valid destructuring assignment despite qux depending on bar: const { foo, bar, qux = () => bar } = myObject; How does this work since the documentation (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment) does not cover how dependent assignments like the example above works. >Solution : qux: () => ‘qux’ means to declare const qux, whose… Read More How does dependent object destructuring assignment work in JavaScript?

I’m taking an online course to learn react. A student posted a solution to a problem that I think is really elegant and I’d like to understand better. The code iterates through an array of items to create a list in the UI. function ItemsMaker({items}) { return ( <div className="itemblocks"> {items.map(item => ( <ExpenseItem title={item.title}… Read More Destructured objects and arrow functions