Breaking News: Grepper is joining You.com. Read the official announcement!

interfaces in javascript

Maximilian Steiger answered on May 13, 2022 Popularity 10/10 Helpfulness 3/10

answer interfaces in javascript

related interface in javascript

interfaces in javascript

Comment

In JavaScript, interfaces are not a native language feature like they are in some other languages (e.g., Java or TypeScript). However, you can achieve similar functionality using object structures and documentation. 


const personInterface = {
  firstName: 'string',
  lastName: 'string',
  age: 'number'
};

const person = {
  firstName: 'John',
  lastName: 'Doe',
  age: 30
};

// Check if an object conforms to the interface
function validatePerson(obj) {
  for (const key in personInterface) {
    if (!(key in obj) || typeof obj[key] !== personInterface[key]) {
      return false;
    }
  }
  return true;
}

console.log(validatePerson(person));  // true

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript

Link to this answer
Share Copy Link

Contributed on Aug 25 2023

Maximilian Steiger

0 Answers Avg Quality 2/10

Closely Related Answers

interface in javascript

Comment

-1

// example duck typing method
var hasMethods = function(obj /*, method list as strings */){
    var i = 1, methodName;
    while((methodName = arguments[i++])){
        if(typeof obj[methodName] != 'function') {
            return false;
        }
    }
    return true;
}

// in your code
if(hasMethods(obj, 'quak', 'flapWings','waggle')) {
    //  IT'S A DUCK, do your duck thang
}

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: interface inte

Link to this answer
Share Copy Link

Contributed on May 13 2022

HandsomeOldGod5355

0 Answers Avg Quality 2/10

interface in javascript

Comment

-2

// example duck typing method
var hasMethods = function(obj /*, method list as strings */){
    var i = 1, methodName;
    while((methodName = arguments[i++])){
        if(typeof obj[methodName] != 'function') {
            return false;
        }
    }
    return true;
}

// in your code
if(hasMethods(obj, 'quak', 'flapWings','waggle')) {
    //  IT'S A DUCK, do your duck thang
}

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: interface inte

Link to this answer
Share Copy Link

Contributed on May 13 2022

HandsomeOldGod5355

0 Answers Avg Quality 2/10

interfaces in javascript

Contents

More Related Answers

interfaces in javascript

Closely Related Answers

interface in javascript

interface in javascript

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.