JAVASCRIPT

get name of class javascript

myObj.constructor.name

javascript get class name

 document.getElementById("myDIV").className = "mystyle"; 

How to get the Class Name of an Object in JavaScript

class Language {}

const l1 = new Language();

console.log(l1.constructor.name);

How to get the Class Name of an Object in JavaScript

const Season = [
  {
    month:'January',
    season: 'Winter',
  },
  {
    month:'March',
    season: 'Spring',
  },
  {
    month:'June',
    season: 'Summer',
  },
  {
    month:'August',
    season: 'Autumn',
  },
]

const index = Season.findIndex( (loopVariable) => loopVariable.month === 'March');
console.log("The index of March Month is",index)

How to get the Class Name of an Object in JavaScript

const Season = [
  {
    month:'January',
    season: 'Winter',
  },
  {
    month:'March',
    season: 'Spring',
  },
  {
    month:'June',
    season: 'Summer',
  },
  {
    month:'August',
    season: 'Autumn',
  },
]

const index = Season.map( (loopVariable) => loopVariable.month).indexOf
 ("March"));
console.log("The index of March Month is",index)

how to get class name of element in javascript

var spans = document.getElementsByTagName("span");
for (var i = 0; i < spans.length; i++) {
    if (spans[i].className == 'xyz') {
        spans[i].style.backgroundColor = '#000';
    }
}

get class name from instance (object)

class Language {}

const l1 = new Language();

console.log(l1.constructor.name); //Language


// Works too
(1)?.constructor.name // "Number"
(false)?.constructor.name // "Boolean"
(1)?.constructor.name // "Number"
("aa")?.constructor.name // "String"
([])?.constructor.name // "Array"
({a:"a"})?.constructor.name // "Object"
(false)?.constructor.name // "Boolean"
(null)?.constructor.name // undefined
(document)?.constructor.name // "HTMLDocument"
(myImageElement)?.constructor.name // "HTMLImageElement"

How to get the Class Name of an Object in JavaScript

class Language {
 getClassName() {
  return this.constructor.name;
 }
}

const l1 = new Language ();

const objClassName = l1.getClassName();

console.log(objClassName);

Get class name of object JavaScript

var what = function(obj) {
  return obj.toString().match(/ (w+)/)[1];
};

get class of object javascript

class Dog{}
var dog = new Dog();
if(dog instanceof Dog){
  console.log("Is dog");
}