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the murmurous sea

flex vs. grid

#dev/undone Q 2020. 7. 17. 14:43
async vs. fetch

https://dev.to/shoupn/javascript-fetch-api-and-using-asyncawait-47mp JavaScript Fetch API and using Async/Await dev.to : when using fetch, it could be chaining of .then()'s and this can lead into what is often referred to as callback hell, or nested callbacks. : But with Async/Await can have better readability. https://hackernoon.com/6-reasons-why-javascripts-async-await-blows-promises-away-tuto..
#dev/undone Q 2020. 6. 25. 12:48
RegExp

1. object (In JavaScript, regular expressions are also objects. ) 2. is used for matching text with a pattern. 3. Regular expressions are patterns used to match character combinations in strings. 4. used with the exec() and test() methods of RegExp, and with the match(), matchAll(), replace(), replaceAll(), search(), and split() methods of String. 5. Starting with ECMAScript 6, new RegExp(/ab+c/..
#dev/undone Q 2020. 6. 24. 12:27
JS ES6: Promise vs. Async await

https://medium.com/better-programming/should-i-use-promises-or-async-await-126ab5c98789#:~:text=Promise%20creation%20starts%20the%20execution,have%20any%20effect%20on%20it. JavaScript: Promises or async-await A set of rules for when to use which medium.com https://medium.com/better-programming/understanding-promises-in-javascript-13d99df067c1 Understanding Promises in JavaScript An in-depth look..
#dev/undone Q 2020. 6. 15. 13:22
JS ES5: strict / non-strict(sloppy) mode

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode Strict mode JavaScript's strict mode, introduced in ECMAScript 5, is a way to opt in to a restricted variant of JavaScript, thereby implicitly opting-out of "sloppy mode". Strict mode isn't just a subset: it intentionally has different semantics from normal code. Brow developer.mozilla.org https://m.blog.naver.com/on21..
#dev/undone Q 2020. 6. 10. 13:27
JS OOP:

class Person { constructor (name, first, second) { this.name = name; this.first = first; this.second = second; } } const Kim = new Person(Kim, 10, 20); console.log('Kim:', Kim); 위의 코드처럼 const나 let을 사용하면 temporal dead zone에 있게 되어 코드를 실행할 수 없음 class와 const/let 모두 ES6에서 새로 추가된 기능인데, 왜 같이 사용할 수 없지...? 어떻게 해야 같이 사용할 수 있지?
#dev/undone Q 2020. 6. 9. 12:43
(Q)Is null a primitive data type in JS?

About null. https://developer.mozilla.org/en-US/docs/Glossary/Primitive Primitive In JavaScript, a primitive (primitive value, primitive data type) is data that is not an object and has no methods. There are 6 primitive data types: string, number, bigint, boolean, undefined, and symbol. There also is null, which is seemingly primitive developer.mozilla.org "There also is null, which is seemingly..
#dev/undone Q 2020. 6. 3. 13:19
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