let & var & initialized bug

what's wrong with this?

https://github.com/lydiahallie/javascript-questions#9-whats-the-output

ReferenceError: greetign is not defined

{}

solution

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode#Strict_mode_for_modules

https://github.com/lydiahallie/javascript-questions/issues/33#issuecomment-521590062

let-initialize & ES module & "use strict"; bug

OK

// "use strict";

/**

 *

 * @author xgqfrms

 * @license MIT

 * @copyright xgqfrms

 * @created 2019-08-15

 *

 * @description let-initialize-ok & ES module & "use strict"; bug

 * @augments

 * @example

 * @link

 *

 */

let log = console.log;

const test = () => {

    let greeting;

    greetign = {}; // Typo!

    log(greetign);

};

test();

// ??? greeting, not initialized

// ReferenceError: greetign is not defined

const testComputed = () => {

    var greetign = {}; // Typo!

    let greeting;

    log(greetign);

};

testComputed();

// {}

"use strict"; & bug

"use strict";

/**

 *

 * @author xgqfrms

 * @license MIT

 * @copyright xgqfrms

 * @created 2019-08-15

 *

 * @description let-initialize & ES module & "use strict"; bug

 * @augments

 * @example

 * @link

 *

 */

let log = console.log;

let greeting;

// greeting, not initialized

// temporal dead zone,

// it is not accessible before the line we declare (initialize) it;

// When we try to access the variables before they are declared, JavaScript throws a ReferenceError.

greetign = {}; // Typo!

log(greetign);

// ReferenceError: greetign is not defined