LeCafeCreme

항상 스뚜뤠쓰..-_-;; skibis.tistory.com/263 javascript null,undefined, empty 체크 방법 if( value ) { // value : 결과가 궁굼한 값 } Colored by Color Scripter cs null undefined NaN empty string ("") 0 false // 4.1.1 // 배열에 뭔가가 들어있는지 여부를 확인하려.. skibis.tistory.com

stackoverflow.com/questions/35948669/how-to-check-if-a-value-exists-in-an-object-using-javascript How to check if a value exists in an object using JavaScript I have an object in JavaScript: var obj = { "a": "test1", "b": "test2" } How do I check that test1 exists in the object as a value? stackoverflow.com

stackoverflow.com/questions/1098040/checking-if-a-key-exists-in-a-javascript-object Checking if a key exists in a JavaScript object? How do I check if a particular key exists in a JavaScript object or array? If a key doesn't exist, and I try to access it, will it return false? Or throw an error? stackoverflow.com www.javascripttutorial.net/object/javascript-check-if-property-exists/ 3 Ways to Ch..

const Employee = { firstname: 'John', lastname: 'Doe' }; console.log(Employee.firstname); // expected output: "John" delete Employee.firstname; console.log(Employee.firstname); // expected output: undefined .. 나 뭐하고 살았지? 이런거 하나 모르고.. 진짜.. -_-;;;;; 개발자 아닌 듯ㅋ;; 그 동안 공부 제대로 안 한거 현타 겁나 씨게 오네..ㅠ developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Operators/delete delete 연산자 delete 연산자는 객체의 속성을 제거합..

다국어 페이지 만들 때 써봐야겠다.. var test = { lang : { en : {}, ko : {} } } test.lang.en.SORRY_MSG = "I'm sorry.."; test.lang.ko.SORRY_MSG = "재송해여ㅠ"; console.log(test); console.log(test.lang); console.log(test.lang.ko.SORRY_MSG); console.log(test.lang.en.SORRY_MSG);

https://pracon.tistory.com/154

document.getElementById("MyElement").classList.add('MyClass'); document.getElementById("MyElement").classList.remove('MyClass'); if ( document.getElementById("MyElement").classList.contains('MyClass') ){ ..; } document.getElementById("MyElement").classList.toggle('MyClass'); document.getElementById("MyElement").className = "MyClass";

https://www.zerocho.com/category/JavaScript/post/5acafb05f24445001b8d796d

setCookie('myHobby', 'game', '3'); function setCookie(cookie_name, value, days) { var exdate = new Date(); exdate.setDate(exdate.getDate() + days); // 설정 일수만큼 현재시간에 만료값으로 지정 var cookie_value = escape(value) + ((days == null) ? '' : '; expires=' + exdate.toUTCString()); document.cookie = cookie_name + '=' + cookie_value; } function getCookie(cookie_name) { var x, y; var val = document.cookie.spli..