enum in javascript es6

ByAnurag batra August 7, 2022June 30, 2022

const seasons = {
  SUMMER: {
    BEGINNING: "summer.beginning",
    ENDING: "summer.ending"
  },
  WINTER: "winter",
  SPRING: "spring",
  AUTUMN: "autumn"
};

let season = seasons.SUMMER.BEGINNING;

if (!season) {
  throw new Error("Season is not defined");
}

switch (season) {
  case seasons.SUMMER.BEGINNING:
  // Do something for summer beginning
  case seasons.SUMMER.ENDING:
  // Do something for summer ending
  case seasons.SUMMER:
  // This will work if season = seasons.SUMMER
  // Do something for summer (generic)
  case seasons.WINTER:
  //Do something for winter
  case seasons.SPRING:
  //Do something for spring
  case seasons.AUTUMN:
  //Do something for autumn
}

Here is what the above code is Doing:
1. We’re creating an object called seasons.
2. We’re creating a variable called season and assigning it the value of seasons.SUMMER.BEGINNING.
3. We’re checking if season is defined. If it’s not, we’re throwing an error.
4. We’re using a switch statement to check the value of season.
5. We’re checking if season is equal to seasons.SUMMER.BEGINNING. If it is, we’re doing something.
6. We’re checking if season is equal to seasons.SUMMER.ENDING. If it is, we’re doing something.
7. We’re checking if season is equal to seasons.SUMMER. If it is, we’re doing something.
8. We’re checking if season is equal to seasons.WINTER. If it is, we’re doing something.
9. We’re checking if season is equal to seasons.SPRING. If it is, we’re doing something.
10. We’re checking if season is equal to seasons.AUTUMN. If it is, we’re doing something.

Javascript Examples

javascript async delay

ByAnurag batra August 4, 2022June 30, 2022

//Javascipt is asyncronous so you can’t pause/block code execution //You can delay doing something with setTimeout setTimeout(function(){ alert(“Sup!”); }, 2000);//wait 2 seconds Here is what the above code is Doing: 1. setTimeout is a function that takes two arguments: a. a function b. a number of milliseconds to wait before executing the function 2. The…

Javascript Examples

jszip angular

ByAnurag batra July 28, 2022June 30, 2022

Here is what the above code is Doing: 1. We are creating a new Angular module called “myApp”. 2. We are creating a new Angular controller called “myCtrl”. 3. We are attaching the controller to the module. 4. We are attaching the module to the HTML document. 5. We are creating a new Angular expression…

Javascript Examples

auto reload page javascript

ByAnurag batra July 6, 2022June 30, 2022

//refresh page every 5 seconds// Here is what the above code is Doing: 1. We’re creating a function called refreshPage() 2. We’re setting the window.location property to the current page address using window.location.href 3. We’re using the setInterval() method to call the refreshPage() function every 5 seconds (5000 milliseconds).

how to check if bottom tab is active in react native material bottom tab

Javascript Examples

how to check if bottom tab is active in react native material bottom tab

ByAnurag batra July 6, 2022June 30, 2022

tabBarIcon: ({ tintColor }) => ( ), } Here is what the above code is Doing: 1. We are importing the Icon component from react-native-vector-icons. 2. We are importing the TabNavigator from react-navigation. 3. We are creating a TabNavigator with two screens: Home and Profile. 4. We are setting the tabBarIcon for the Home screen…

change key in array of objects javascript

Javascript Examples

change key in array of objects javascript

ByAnurag batra July 10, 2022June 30, 2022

const users = [ { name: “Alex”, age: 25 }, { name: “John”, age: 32 }, ]; const newUsers = users.map((user) => ({ …user, age: user.age + 5, // just for example })); // newUsers = [ // {name:”Alex” , age:30}, // {name:”John , age:37} // ] Here is what the above code is Doing:…

Javascript Examples

stop async function javascript

ByAnurag batra July 13, 2022June 30, 2022

Unfortunately, there is no way to stop an asynchronous running method without using ‘state’ var. Once called, method cannot be stopped, even using very ‘low-level’ JS methods. For ‘state’ var, please check Jared Smith’s answer. Here is what the above code is Doing: 1. The first time you call the function, it sets the timer…

Similar Posts