MARKUP IN JSX

 RULES IN JSX

1. RETURN A SINGLE ROOT ELEMENT

WE CANNOT RETURN MORE THAN ONE HTML TAGS. IF NEEDED MULTIPLE HTML TAGS CAN BE EMBEDED INTO A <div> BLOCK AND WILL BE RETURNED.

2. CLOSE ALL THE TAGS

ALL THE HTML TAGS SHOULD BE CLOSED. INCLUDING TAGS LIKE <img> AND <input>



3. CAMEL CASE MOST OF THE THINGS.

THE COMPONENT NAME STARTS WITH A CAPITAL LETTER.

WE CANNOT USE JS KEYWORDS AS HTML ATTRIBUTES.

EX: IN JS, "class" IS A RESERVED KEYWORD THAT HAS A PARTICULAR MEANING (OOPS)

IN HTML , WE CAN USE class IN A DIV BLOCK <div class="mainbox">

BUT IN JSX WE CANNOT USE THE RESERVED KEYWORDS LIKE THAT.

HERE WE DEFINE IT AS <div className="mainbox">

function Title() {
  return <div className="mainbox">
    <h2>TITLE!!!!</h2>
  </div>

}

export default Title;






Comments

Post a Comment

Popular posts from this blog

DEPENDENCIES IN useEffect()

Image
 DEPENDENCIES REFER TO STATE VARIABLES. WHATEVER VARIABLE DECLARED AS A DEPENDENCY WILL ONLY BE PERFORMED AS A SIDE EFFECT. WE DECLARE THEM AS ARRAYS IN TWO  WAYS,  [COUNTX] - MEANS THAT ONLY COUNTX WILL BE USED AS A SIDE EFFECT. [] - EMPTY , MEANS THAT SIDE EFFECT IS PERFORMED ONLY WHEN THE PAGE IS RENDERED ( NOT RE-RENDERED). ( IN THE BEGINNIG)  EX- WE CREATE TWO STATE VARIABLES, COUNTX AND COUNT Y , HERE WE ONLY ADD SIDE EFFECTS TO COUNT X. import { useEffect , useState } from "react" ; export default function Counter () {   let [ countx , setCountx ] = useState ( 0 );   let [ county , setCounty ] = useState ( 0 );   let incx = () => {     setCountx (( currCount ) => currCount + 1 );   };   let incy = () => {     setCounty (( currCount ) => currCount + 1 );   };   useEffect ( function PrintSomething () {     console . log ( "this is a side effect" );   },[ co...
Read more

ACTIVITY1

Image
 SHOW A HELLO MESSAGE  ALONG WITH THE USERNAME WITH THE GIVEN TEXT COLOR. TWO PROPS ARE GIVEN, USERNAME AND TEXTCOLOR. ACTIVITY1.JSX function Activity1 ({ userName , textColor }) {   let styles = { color : textColor };   return < h3 style = { styles } > Hello! { userName } </ h3 > ; } export default Activity1 ; APP.JSX import Activity1 from "./Activity1.jsx" ; function App () {   // let name = "abhi";   // return <ProductTab />;   return (     <>     < Activity1 userName = "abhii" textColor = "yellow" />     < Activity1 userName = "ashwith" textColor = "orange" />     < Activity1 userName = "bharath" textColor = "red" />     < Activity1 userName = "vinay" textColor = "red" />     </>   ) }
Read more

CONDITIONALS

Image
 CONDITIONAL STATEMENTS (IF) CAN BE PASSED AS TERNARY OPERATORS OR EVEN BY USING(  &&) LOGICAL AND OPERATOR. import "./Product.css" ; function Product ({ title , price , features }) {   return (     < div className = "Product" >       < h4 > { title } </ h4 >       < h5 > price: { price } </ h5 >       { price > 15000 ? < p > Discount of 5% </ p > : null }       { /* <p>{features.map((feature) => <li>{feature}</li>)}</p> */ }     </ div >   ); } export default Product ; LOGICAL AND OPERATOR.       { price > 15000 && < p > Discount of 5% </ p > }
Read more