Stronka zawierająca info o JS


Skryptowy język programowania, stworzony przez firmę Netscape, najczęściej stosowany na stronach internetowych. Twórcą JavaScriptu jest Brendan Eich. Pod koniec lat 90. XX wieku organizacja ECMA wydała na podstawie JavaScriptu standard języka skryptowego o nazwie ECMAScript, aktualnie rozwijaniem tego standardu zajmuje się komisja TC39.

var x = "John Doe"
<!DOCTYPE html>
<html>
 <body>
  <h2> JavaScript Strings </h2>
  <p> id="demo" </p>
  <script>
   var x = "John Doe";
   document.getElementById("demo").innerHTML = x;
  </script>
 </body>
</html>
JavaScript Strings
John Doe

var carname = "Volvo XC60"; // Podwójny
var carname = 'Volvo XC60'; // Pojedyńczy


* ten znak " // " oznacza komentarz;
<!DOCTYPE html>
<html>
 <body>
  <h2> JavaScript Strings </h2 >
  <p> Strings are written inside quotes. You can use single or double quotes: </p>
  <p> id="demo" </p>
  <script>
   var carName1 = "Volvo XC60"; // Double quotes
   var carName2 = 'Volvo XC60'; // Single quotes
   document.getElementById("demo").innerHTML = carName1 + " " + carName2;
  </script>
 </body>
</html>
JavaScript Strings
Strings are written inside quotes. You can use single or double quotes:

Volvo XC60 Volvo XC60

var answer1 = "It's alright";
var answer2 = "He is called 'Johnny'";
var answer3 = 'He is called "Johnny"';


document.getElementById("demo").innerHTML =
answer1 + answer2 + answer3;
<!DOCTYPE html>
<html>
 <body>
  <h2> JavaScript Strings </h2 >
  <p> You can use quotes inside a string, as long as they don't match the quotes surrounding the string. </p>
  <p> id="demo" </p >
  <script >
   var answer1 = "It's alright";
   var answer2 = "He is called 'Johnny'";
   var answer3 = 'He is called "Johnny"';
   document.getElementById("demo").innerHTML = answer1 + answer2 + answer3;
  </script>
 </body>
</html>
JavaScript Strings

You can use quotes inside a string, as long as they don't match the quotes surrounding the string.


It's alright
He is called 'Johnny'
He is called "Johnny"