TechoSwag

Hello Guys, In this blog your going to learn about CALL(), APPLY() and BIND() method in JavaScript with details understanding and examples. Invoking a function with a specific this value is possible in JavaScript through call(), apply(), and bind(). These three methods may be comparable in terms of their function, but the way they operate and handle arguments set them apart. call(), apply(), and bind() can be confusing to differentiate, so let's look at how each one differs from one another. Call() :-  Method used to invoke a function with specified this value and given arguments - call(). First argument is this value, followed by any expected arguments. For instance, a case in point: Calling findNames() in this scenario, we set the this value to person, thus causing person.name to equate to this.name within the function. APPLY() :-  Ahead of time, it's sometimes unclear how many arguments will be required when calling a function.  In such instances, the apply() method is h

Hello guys, in this blog we are going to learn how to setup   REACT - JS   environment in the local system Let’s get started There is  two  way we can install  React-JS 1) Using NPM Command 2) Using create-react-app In this blog, we are going to learn about the second way  create-react-app For that, we need to perform some steps Step 1: you need to install node js and npm by using the below link                                         https://nodejs.org/en/ Step 2: Install React By using the below command we can install react JS  npm install -g create-react-app After successfully install the above command now we can create react app Step 3: Create react app  for creating react app you just need to use the below command and need to enter your project name like below. create-react-app all-in-one After successfully create project you will get the below screen Step 4: Run React App For that, you need to go into a specific folder location and after that need to run the below command to run

Hey Guys, In this blog we are going to learn about How we can use Lazy-loading in angular with examples. We are also going to learn the different syntax of lazy loading in angular . Lazy loading is used to load the specified module once the routes match. It will load the modules once use access that particular section or modules in our application. Using lazy loading will improve the performance of our application and also decrease the load time of our application. Using lazy-loading will help to reduce the bundle size of the application. Lazy -loading Old syntax in angular 7 or lower version          {                path: "feature",                loadChildren:'./feature-module/feature-module.module#FeatureModuleModule'          }, Lazy -loading new syntax in angular 8+   {     path:'feature',     loadChildren:() =>  import('./feature-module/feature-module.module').then(m => m.FeatureModuleModule)   } For example, Let's say we create a mo

Hey Guys, in this blog we are going to learn about What is the different between   LET and CONST key word ( ES 6)    with examples  Let's get started... LET: Let  key word now we are using for  declaring variables . It's not like a surprise because it's come with improvement of  VAR  keywords. In  Let , we can declare variables like we are declaring using the  VAR keyword  but in  LET  keyword we cannot re-declare that variables like below. but we can change the value of variable like beow CONST: In  CONST  keyword we are using when we have  static value.  Let assume you have one value that  not going to change anywhere in the function of the file  in that case we can use  CONST  Keywords. we can not re-declare const variable and we can not update const keyword value like below. but we can use it like below. If you guys have any query then you can drop a mail to us on this mail id: techoswag@gmail.com

  Hey Guys, in this blog we are going to learn about What is Java Script Arrow Functions and how we can use it. Let's get started... - Arrow function has been introduced in the ES 6. - Arrow function allow us to write function shortly and simply. Arrow function looks like below const funcName = (arg1, arg2, arg3, ..., argN) => expression - Basically above expression means is it creates a  function  with  name: funcName  with the  arg1, arg2, ar3,...,argN  and after that, it's evaluate the  expression  and  return the results . - Let's take a simple example let's print the sum of two number using arrow function. In this example as you can see here function name is  sums  and it's take  two arguments x and y   and it's evaluate  expression ( x+ y )  and based on evaluation it will return result so here it will return  result 25. - Suppose if in any example if we have only  one parameter  so in that case we can  omitted parentheses  from pa

Today we are going to learn about Angular Basics  Let's get start... What is Angular         -    Angular is TypeScript Based open-source front-end platform.          -    Using angular we can create our application on the web and mobile side.         -    Angular is created and managed by Google.         -    It provides some features like component, directive, module, services, and end to                 end tooling. Features of Angular 1. DOM ( Document Object Model ) 2. TS ( Type-Script ) 3. Data Binding 4. Testing 1. DOM ( Document Object Model )    - In Angular, we are using regular DOM.   - Suppose we are updating 6 instances on the same HTML page.     In that case, angular is going to update the entire tree structure of HTML tags.   2. TS ( Type-Script )   - TypeScript is the superset of JS ( Javascript ).  - In the browser, It’s compiled into Plan JavaScript.  - TypeScript is created and managed by Microsoft. It provides some    feat

Java-Script Rest and Spread Operators:  In JavaScript, we are using three dots ( ... ) for both REST and SPREAD Operators. But these two operators are not the same they both have a different purpose. REST Operator - Purpose of this operator is to collect all remaining elements into the array. - For Example:           - let take one array in below example      - O/P :       Necklace [ 'Earring', 'Payal', 'Brooch', 'Bangles']   - In the Above example three-dot contain the rest of the product time in the restProdcut variable that calls Destructuring that breaks our code into small pieces.   - so in the above example, mainProduct variable contains my Main product and restProduct varibale contains my rest products.   - The rest operator always gives rest data into array format only.   - while creating function we can also use rest operator like below SPREAD Operator:  - It's work opposite to rest operators, like in rest operator we are collecting item