Operaattorin ensisijaisuus kuvaa järjestystä, jossa toiminnot suoritetaan aritmeettinen lauseke.
Kertolaskulla (*
) ja jaolla (/
) on suurempi etusija kuin yhteenlasku (+
) ja vähennyslasku (-
).
Kuten perinteisessä matematiikassa, kertolasku tehdään ensin:
let x = 100 + 50 * 3;
Kokeile itse →
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arithmetic</h1>
<h2>Operator Precedence</h2>
<p>Multiplication has precedence over addition.</p>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = 100 + 50 * 3;
</script>
</body>
</html>
Sulkuja käytettäessä sulkujen sisällä olevat toiminnot lasketaan ensin:
let x = (100 + 50) * 3;
Kokeile itse →
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arithmetic</h1>
<h2>Operator Precedence</h2>
<p>Multiplication has precedence over addition.</p>
<p>But parenthesis has precedence over multiplication.</p>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = (100 + 50) * 3;
</script>
</body>
</html>
Toiminnot, joilla on sama tärkeysjärjestys (kuten * ja /), lasketaan vasemmalta oikealle:
let x = 100 / 50 * 3;
Kokeile itse →
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arithmetic</h1>
<h2>Operator Precedence</h2>
<p>When many operations has the same precedence, they are computed from left to right.</p>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = 100 / 50 * 3;
</script>
</body>
</html>
Suluissa olevat lausekkeet lasketaan ennen lausekkeen loppuosaa
Funktiot suoritetaan ennen kuin tulosta käytetään lausekkeen loppuosassa
( )
Prioriteetti: 18
Lausekkeiden ryhmittely
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arithmetic</h1>
<h2>Operator Precedence</h2>
<p>Multiplication has precedence over addition.</p>
<p>But parenthesis has precedence over multiplication.</p>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = (100 + 50) * 3;
</script>
</body>
</html>
Esimerkki:
(100 + 50) * 3
.
Prioriteetti: 17
Jonkin jäsen
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The . Operator</h2>
<p>Car name is:</p>
<p id="demo"></p>
<script>
const car = {type:"Fiat", model:"500", color:"white"};
document.getElementById("demo").innerHTML = car.type;
</script>
</body>
</html>
Esimerkki:
person.name
[]
Prioriteetti: 17
Jonkin jäsen
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The [] Operator</h2>
<p>Car name is:</p>
<p id="demo"></p>
<script>
const car = {type:"Fiat", model:"500", color:"white"};
document.getElementById("demo").innerHTML = car["type"];
</script>
</body>
</html>
Esimerkki:
person["name"]
?.
Prioriteetti: 17
Valinnainen ketjutus
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The ?. Operator</h2>
<p>The ?. operator returns undefined if an object is undefined or null (instead of throwing an error).</p>
<p>Car name is:</p>
<p id="demo"></p>
<script>
const car = {type:"Fiat", model:"500", color:"white"};
let name = car?.name;
document.getElementById("demo").innerHTML = name;
</script>
</body>
</html>
Esimerkki:
x ?. y
Prioriteetti:
Esimerkki:
()
Prioriteetti: 17
Toimintokutsu
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Functions</h1>
<p>Call a function which performs a calculation and returns the result:</p>
<p id="demo"></p>
<script>
function myFunction(p1, p2) {
return p1 * p2;
}
let result = myFunction(4, 3);
document.getElementById("demo").innerHTML = result;
</script>
</body>
</html>
Esimerkki:
myFunction()
new
Prioriteetti: 17
uutta argumenttien kanssa
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript new Date()</h1>
<p>A Date object can be created with a specified date and time:</p>
<p id="demo"></p>
<script>
const d = new Date("June 5, 2022");
document.getElementById("demo").innerHTML = d;
</script>
</body>
</html>
Esimerkki:
new Date("June 5,2022")
new
Prioriteetti: 16
uusi ilman argumentteja
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Dates</h1>
<h2>Using new Date()</h2>
<p>new Date() without arguments, creates a date object with the current date and time:</p>
<p id="demo"></p>
<script>
const d = new Date();
document.getElementById("demo").innerHTML = d;
</script>
</body>
</html>
Esimerkki:
new Date()
Jälkiliitteen lisäykset suoritetaan ennen etuliitteen lisäyksiä
++
Prioriteetti: 15
Postfix lisäys
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<p>In this example, y is incremented after it is assigned to x (post-incremented).</p>
<p id="demo1"></p>
<p id="demo2"></p>
<script>
var y = 5;
var x = y++;
document.getElementById("demo1").innerHTML = y;
document.getElementById("demo2").innerHTML = x;
</script>
</body>
</html>
Esimerkki:
i++
--
Prioriteetti: 15
Postfix Decrement
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<p>In this example, y is decremented after it is assigned to x (post-decremented).</p>
<p id="demo1"></p>
<p id="demo2"></p>
<script>
var y = 5;
var x = y--;
document.getElementById("demo1").innerHTML = y;
document.getElementById("demo2").innerHTML = x;
</script>
</body>
</html>
Esimerkki:
i--
++
Prioriteetti: 14
Etuliitteen lisäys
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<p>In this example, y is incremented before it is assigned to x (pre-incremented).</p>
<p id="demo1"></p>
<p id="demo2"></p>
<script>
var y = 5;
var x = ++y;
document.getElementById("demo1").innerHTML = y;
document.getElementById("demo2").innerHTML = x;
</script>
</body>
</html>
Esimerkki:
++i
--
Prioriteetti: 14
Etuliitteen vähentäminen
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<p>In this example, y is decremented before it is assigned to x (pre-decremented).</p>
<p id="demo1"></p>
<p id="demo2"></p>
<script>
var y = 5;
var x = --y;
document.getElementById("demo1").innerHTML = y;
document.getElementById("demo2").innerHTML = x;
</script>
</body>
</html>
Esimerkki:
--i
!
Prioriteetti: 14
Loogista EI
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The ! Operator</h2>
<p id="demo1"></p>
<p id="demo2"></p>
<script>
document.getElementById("demo1").innerHTML = (5 == 8);
document.getElementById("demo2").innerHTML = !(5 == 8);
</script>
</body>
</html>
Esimerkki:
!(x==y)
~
Prioriteetti: 14
Bitittain EI
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Bitwise NOT</h1>
<h2>The ~ Operator</h2>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = ~ 5;
</script>
</body>
</html>
Esimerkki:
~x
+
Prioriteetti: 14
Unary Plus
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>Unary Plus</h2>
<p id="demo"></p>
<script>
let x = 5;
document.getElementById("demo").innerHTML = +x;
</script>
</body>
</html>
Esimerkki:
+x
-
Prioriteetti: 14
Yksinäinen miinus
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>Unary Minus</h2>
<p id="demo"></p>
<script>
let x = 5;
document.getElementById("demo").innerHTML = -x;
</script>
</body>
</html>
Esimerkki:
-x
typeof
Prioriteetti: 14
Tietotyyppi
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The typeof Operator</h2>
<p>The typeof operator returns the type of a variable, object, function or expression:</p>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML =
"'John' is " + typeof "John" + "<br>" +
"3.14 is " + typeof 3.14 + "<br>" +
"NaN is " + typeof NaN + "<br>" +
"false is " + typeof false + "<br>" +
"[1, 2, 3, 4] is " + typeof [1, 2, 3, 4] + "<br>" +
"{name:'John', age:34} is " + typeof {name:'John', age:34} + "<br>" +
"new Date() is " + typeof new Date() + "<br>" +
"function () {} is " + typeof function () {} + "<br>" +
"myCar is " + typeof myCar + "<br>" +
"null is " + typeof null;
</script>
</body>
</html>
Esimerkki:
typeof x
void
Prioriteetti: 14
Arvioi Void
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The void Operator</h2>
<p>
<a href="javascript:void(0);">Useless link</a>
</p>
<p>
<a href="javascript:void(document.body.style.backgroundColor='red');">
Click me to change the background color of body to red.</a>
</p>
</body>
</html>
Esimerkki:
void(0)
delete
Prioriteetti: 14
Omaisuus Poista
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The delete Operator</h2>
<p>After deleting the color property, myCar.color is:</p>
<p id="demo"></p>
<script>
const myCar = {type:"Fiat", model:"500", color:"white"};
delete myCar.color;
document.getElementById("demo").innerHTML = myCar.color;
</script>
</body>
</html>
Esimerkki:
delete myCar.color
Eksponentit suoritetaan ennen kertolaskuja
Kerto- ja jakolasku suoritetaan ennen yhteen- ja vähennyslaskuja
**
Prioriteetti: 13
Eksponentointi
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arithmetic</h1>
<h2>The ** Operator</h2>
<p id="demo"></p>
<script>
let x = 5;
document.getElementById("demo").innerHTML = x ** 2;
</script>
</body>
</html>
Esimerkki:
10 ** 2
*
Prioriteetti: 12
Kertominen
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arithmetic</h1>
<h2>The * Operator</h2>
<p id="demo"></p>
<script>
let x = 5;
let y = 2;
let z = x * y;
document.getElementById("demo").innerHTML = z;
</script>
</body>
</html>
Esimerkki:
10 * 5
/
Prioriteetti: 12
Division
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arithmetic</h1>
<h2>The / Operator</h2>
<p id="demo"></p>
<script>
let x = 5;
let y = 2;
let z = x / y;
document.getElementById("demo").innerHTML = z;
</script>
</body>
</html>
Esimerkki:
10 / 5
%
Prioriteetti: 12
Jaoston jäännös
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arithmetic</h1>
<h2>The % Operator</h2>
<p id="demo"></p>
<script>
let x = 5;
let y = 2;
let z = x % y;
document.getElementById("demo").innerHTML = z;
</script>
</body>
</html>
Esimerkki:
10 % 5
+
Prioriteetti: 11
Lisäys
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arithmetic</h1>
<h2>The + Operator</h2>
<p id="demo"></p>
<script>
let x = 5;
let y = 2;
let z = x + y;
document.getElementById("demo").innerHTML = z;
</script>
</body>
</html>
Esimerkki:
10 + 5
-
Prioriteetti: 11
Vähennyslasku
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arithmetic</h1>
<h2>The - Operator</h2>
<p id="demo"></p>
<script>
let x = 5;
let y = 2;
let z = x - y;
document.getElementById("demo").innerHTML = z;
</script>
</body>
</html>
Esimerkki:
10 - 5
+
Prioriteetti: 11
Yhdistäminen
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript String Operators</h1>
<h2>The + Operator</h2>
<p>The + operator concatenates (adds) strings.</p>
<p id="demo"></p>
<script>
let text1 = "John";
let text2 = "Doe";
let text3 = text1 + " " + text2;
document.getElementById("demo").innerHTML = text3;
</script>
</body>
</html>
Esimerkki:
"John" + "Doe"
<<
Prioriteetti: 10
Vaihto vasemmalle
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Bitwise Left</h1>
<h2>The << Operator</h2>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = 5 << 1;
</script>
</body>
</html>
Esimerkki:
x << 2
>>
Prioriteetti: 10
Vaihto oikealle (allekirjoitettu)
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Signed Bitwise Right</h1>
<h2>The >> Operator</h2>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = -5 >> 1;
</script>
</body>
</html>
Esimerkki:
x >> 2
>>>
Prioriteetti: 10
Vaihto oikealle (allekirjoittamaton)
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Unsigned Bitwise Right</h1>
<h2>The >>> Operator</h2>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = 5 >>> 1;
</script>
</body>
</html>
Esimerkki:
x >>> 2
in
Prioriteetti: 9
Kiinteistö kohteessa
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The in Operator</h2>
<p>Is "PI" a property of Math?</p>
<p id="demo"></p>
<script>
// Create an object:
document.getElementById("demo").innerHTML = "PI" in Math;
</script>
</body>
</html>
Esimerkki:
"PI" in Math
instanceof
Prioriteetti: 9
Objektin esiintymä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The instanceof Operator</h2>
<p>The instanceof operator returns true if an object is an instance of a specified object:</p>
<p id="demo"></p>
<script>
const cars = ["Saab", "Volvo", "BMW"];
document.getElementById("demo").innerHTML =
(cars instanceof Array) + "<br>" +
(cars instanceof Object) + "<br>" +
(cars instanceof String) + "<br>" +
(cars instanceof Number);
</script>
</body>
</html>
Esimerkki:
x instanceof Array
<
Prioriteetti: 9
Vähemmän kuin
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Comparison</h1>
<h2>The < Operator</h2>
<p>Assign 5 to x, and display the value of the comparison (x < 8).</p>
<p id="demo"></p>
<script>
let x = 5;
document.getElementById("demo").innerHTML = (x < 8);
</script>
</body>
</html>
Esimerkki:
x < y
<=
Prioriteetti: 9
Pienempi tai yhtä suuri
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Comparison</h1>
<h2>The <= Operator</h2>
<p>Assign 5 to x, and display the value of the comparison (x <= 8).</p>
<p id="demo"></p>
<script>
let x = 5;
document.getElementById("demo").innerHTML = (x <= 8);
</script>
</body>
</html>
Esimerkki:
x <= y
>
Prioriteetti: 9
Suurempi kuin
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Comparison</h1>
<h2>The > Operator</h2>
<p>Assign 5 to x, and display the value of the comparison (x > 8).</p>
<p id="demo"></p>
<script>
let x = 5;
document.getElementById("demo").innerHTML = (x > 8);
</script>
</body>
</html>
Esimerkki:
x > y
>=
Prioriteetti: 9
Suurempi tai yhtä suuri
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Comparison</h1>
<h2>The >= Operator</h2>
<p>Assign 5 to x, and display the value of the comparison (x >= 8).</p>
<p id="demo"></p>
<script>
let x = 5;
document.getElementById("demo").innerHTML = (x >= 8);
</script>
</body>
</html>
Esimerkki:
x >= Array
==
Prioriteetti: 8
Yhtä suuri
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Comparison</h1>
<h2>The == Operator</h2>
<p>Assign 5 to x, and display the value of the comparison (x == 8):</p>
<p id="demo"></p>
<script>
let x = 5;
document.getElementById("demo").innerHTML = (x == 8);
</script>
</body>
</html>
Esimerkki:
x == y
===
Prioriteetti: 8
Tiukka yhtäläinen
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Comparison</h1>
<h2>The === Operator</h2>
<p>Assign 5 to x, and display the value of the comparison (x === 5):</p>
<p id="demo"></p>
<script>
let x = 5;
document.getElementById("demo").innerHTML = (x === 5);
</script>
</body>
</html>
Esimerkki:
x === y
!=
Prioriteetti: 8
Epätasainen
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Comparison</h1>
<h2>The != Operator</h2>
<p>Assign 5 to x, and display the value of the comparison (x != 8).</p>
<p id="demo"></p>
<script>
let x = 5;
document.getElementById("demo").innerHTML = (x != 8);
</script>
</body>
</html>
Esimerkki:
x != y
!==
Prioriteetti: 8
Tiukka epätasainen
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Comparison</h1>
<h2>The !== Operator</h2>
<p>Assign 5 to x, and display the value of the comparison (x !== "5"):</p>
<p id="demo"></p>
<script>
let x = 5;
document.getElementById("demo").innerHTML = (x !== "5");
</script>
</body>
</html>
Esimerkki:
x !== y
&
Prioriteetti: 7
Bitittain JA
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Bitwise AND</h1>
<h2>The & Operator</h2>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = 5 & 1;
</script>
</body>
</html>
Esimerkki:
x & y
^
Prioriteetti: 6
Bitittainen XOR
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Bitwise XOR</h1>
<h2>The ^ Operator</h2>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = 5 ^ 1;
</script>
</body>
</html>
Esimerkki:
x ^ y
|
Prioriteetti: 5
Bittikohtaisesti TAI
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Bitwise OR</h1>
<h2>The | Operator</h2>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = 5 | 1;
</script>
</body>
</html>
Esimerkki:
x | y
&&
Prioriteetti: 4
Looginen JA
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Comparison</h1>
<h2>The && Operator (Logical AND)</h2>
<p>The && operator returns true if both expressions are true, otherwise it returns false.</p>
<p id="demo"></p>
<script>
let x = 6;
let y = 3;
document.getElementById("demo").innerHTML =
(x < 10 && y > 1) + "<br>" +
(x < 10 && y < 1);
</script>
</body>
</html>
Esimerkki:
x && y
||
Prioriteetti: 3
Looginen TAI
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Comparison</h1>
<h2>The || Operator (Logical OR)</h2>
<p>The || returns true if one or both expressions are true, otherwise it returns false.</p>
<p id="demo"></p>
<script>
let x = 6;
let y = 3;
document.getElementById("demo").innerHTML =
(x == 5 || y == 5) + "<br>" +
(x == 6 || y == 0) + "<br>" +
(x == 0 || y == 3) + "<br>" +
(x == 6 || y == 3);
</script>
</body>
</html>
Esimerkki:
x || y
??
Prioriteetti: 3
Nullish Coalescing
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The ?? Operator</h2>
<p>The ?? operator returns the first argument if it is not nullish (null or undefined). Otherwise it returns the second.</p>
<p id="demo"></p>
<script>
let name = null;
let text = "missing";
let result = name ?? text;
document.getElementById("demo").innerHTML = "The name is " + result;
</script>
</body>
</html>
Esimerkki:
x ?? y
? :
Prioriteetti: 2
Kunto
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Comparison</h1>
<h2>The () ? : Ternary Operator</h2>
<p>Input your age and click the button:</p>
<input id="age" value="18" />
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
let age = document.getElementById("age").value;
let voteable = (age < 18) ? "Too young":"Old enough";
document.getElementById("demo").innerHTML = voteable + " to vote.";
}
</script>
</body>
</html>
Esimerkki:
? "yes" : "no"
Tehtävät suoritetaan muiden toimintojen jälkeen
=
Prioriteetti: 2
Yksinkertainen tehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Simple Assignment</h2>
<h3>The = Operator</h3>
<p id="demo"></p>
<script>
let x = 10;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x = y
:
Prioriteetti: 2
Kaksoispisteen tehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Objects</h1>
<h2>The : Operator</h2>
<p id="demo"></p>
<script>
const size = {x: 5, y: 10, z: 1};
document.getElementById("demo").innerHTML = "The width is " + size.x;
</script>
</body>
</html>
Esimerkki:
x: 5
+=
Prioriteetti: 2
Lisäystehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Addition Assignment</h2>
<h3>The += Operator</h3>
<p id="demo"></p>
<script>
let x = 10;
x += 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x += y
-=
Prioriteetti: 2
Vähennystehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Subtraction Assignment</h2>
<h3>The -= Operator</h3>
<p id="demo"></p>
<script>
let x = 10;
x -= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x -= y
*=
Prioriteetti: 2
Kertolaskutehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Multiplication Assignment</h2>
<h3>The *= Operator</h3>
<p id="demo"></p>
<script>
let x = 10;
x *= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x *= y
**=
Prioriteetti: 2
Eksponenttimääräys
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Exponentiation Assignment</h2>
<h3>The **= Operator</h3>
<p id="demo"></p>
<script>
let x = 10;
x **= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x **= y
/=
Prioriteetti: 2
Osaston tehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Division Assignment</h2>
<h3>The /= Operator</h3>
<p id="demo"></p>
<script>
let x = 10;
x /= 5;
document.getElementById("demo").innerHTML = x;
</script>
</body>
</html>
Esimerkki:
x /= y
%=
Prioriteetti: 2
Loput tehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Remainder Assignment</h2>
<h3>The %= Operator</h3>
<p id="demo"></p>
<script>
let x = 10;
x %= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x %= y
<<=
Prioriteetti: 2
Vasen vaihtotehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Left Shift Assignment</h2>
<h3>The <<= Operator</h3>
<p id="demo"></p>
<script>
let x = -100;
x <<= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x <<= y
>>=
Prioriteetti: 2
Oikean vuoron tehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Right Shift Assignment</h2>
<h3>The >>= Operator</h3>
<p id="demo"></p>
<script>
let x = -100;
x >>= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x >>= y
>>>=
Prioriteetti: 2
Allekirjoittamaton oikea vaihto
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Right Shift Assignment</h2>
<h3>The >>>= Operator</h3>
<p id="demo"></p>
<script>
let x = -100;
x >>>= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x >>>= y
&=
Prioriteetti: 2
Bittikohtainen JA määritys
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Bitwise AND Assignment</h2>
<h3>The &= Operator</h3>
<p id="demo"></p>
<script>
let x = 100;
x &= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x &= y
|=
Prioriteetti: 2
Bittikohtainen TAI Tehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Bitwise OR Assignment</h2>
<h3>The |= Operator</h3>
<p id="demo"></p>
<script>
let x = 100;
x |= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x |= y
^=
Prioriteetti: 2
Bittikohtainen XOR-määritys
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Bitwise XOR Assignment</h2>
<h3>The ^= Operator</h3>
<p id="demo"></p>
<script>
let x = 100;
x ^= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x ^= y
&&=
Prioriteetti: 2
Looginen JA Tehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Logical AND Assignment</h2>
<h3>The &&= Operator</h3>
<p id="demo"></p>
<script>
let x = 100;
x &&= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x &&= y
||=
Prioriteetti: 2
Looginen TAI Tehtävä
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Assignments</h1>
<h2>Logical OR Assignment</h2>
<h3>The ||= Operator</h3>
<p id="demo"></p>
<script>
let x = 100;
x ||= 4;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>
</body>
</html>
Esimerkki:
x ||= y
=>
Prioriteetti: 2
Nuoli
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Functions</h1>
<h2>The Arrow Function</h2>
<p>This example shows an Arrow Function with a parameter.</p>
<p id="demo"></p>
<script>
let hello = "";
hello = (val) => "Hello " + val;
document.getElementById("demo").innerHTML = hello("Universe!");
</script>
</body>
</html>
Esimerkki:
x => y
yield
Prioriteetti: 2
Tauko/Jatka
Esimerkki:
yield x
yield*
Prioriteetti: 2
Delegoida
Esimerkki:
yield* x
...
Prioriteetti: 2
Levitän
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The ... Operator</h2>
<p>The "Spread" operator can be used to expand an iterable into more arguments for function calls:</p>
<p id="demo"></p>
<script>
const numbers = [23,55,21,87,56];
let maxValue = Math.max(...numbers);
document.getElementById("demo").innerHTML = maxValue;
</script>
</body>
</html>
Esimerkki:
... x
,
Prioriteetti: 1
Pilkku
Esimerkki:
x , y