Javascript Introduction in Hindi
Java or javascript dono alag alag programming languages hai, Javascript ek high-level, untyped and interpreted programming language hai. High-level language matlab jo machine in-dependent languages hoti hai or low level matlab jo machine dependent languages hoti hai.
Javascript programming language web applications banane etc mein use ki jati hai.
History of Javascript
* Javascript ko may 1995 mein Brendan Eich ne banaya that or 10 dino mein he usne iska phela version launch kiya tha.
* Brendan Eich Netscape Company mein kaam karta tha jo uss time bhaut popular browser tha.
* Sabse phela javascript ka naam Mocha raka gaya tha.
* lekin fir september 1995 mein iska naam fir sa change karke Livescript raka gaya.
* Fir dubara ussi saal 1995 december mein iska naam dubara change karke livescript sa Javascript raka gaya.
Hum Java ko Use kyu karte hai :
Javascript ko hum mainly 4 reasons ke liya use karte hai:
1. Add Funcationality
2. Forms Validiate
3. Communicating with the server
4. Read-write html element
1. Add funcationality : Iska matlab apne kabi natice kiya hota web pages or website mein time show hota hai yha color change hota hai jab app click karte ho, bhaut sari aise websites hai jinko jab app open karte ho or or vha app notice karte ho kab color change hota hai kab necha ek timer show hota hai yha jesa he app mouse leta ho uss website ke kisi particular jagga par to phela sa dusra design change hota hai yeh sab hota hai javascript ki help sa.
2. Forms Validiate : App kabhi notice karna jab bhi app kahi par form bharoge kisi website par yha kahi par bhi jisme name , email or message etc karke submit karte hai, to app notice karna agar apne koi ek option bina fill kiya submit karte ho to ek error msg show hota hai ki yeh field rha gayi hai yha issa fill koro vo sab javascript ki help sa hota hai.
3. Communicating with the server : Jab bhi app broswer mein kuch search karte ho like hume search karna hai javascript introduction to app broswer mein jab sirf javascript likoge ko app dekna apko suggestion show hogi uss keyword sa related , app youtube par he dek lo jab app youtube par sirf funny likoga to app suggestions funny sa related bhaut sare keywords show hoga yeh sab suggestion jo show hoti hai yeh bhi javascript ki help sa hota hai.
4. Read-write html element : Iska mtlb yeh hai ki humare pass 3 files hoti hai ek html ki or css ki and javascript ki
Html sa hume jo web page par text show karwana hai vo likte hai
Css sa hum uss HTML text ko style deta hai kabi color change karna ho yha baki sab
But javascript sa hum yeh dono kaam bhi kar sakte hai mtlb hum HTML element ka color css ki jagga javascript sa bhi change kar sakte hai, iska mtlb javascript sa hum in dono files mein design or text add kar sakte hai.