Precedência do Operador JavaScript

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A precedência do operador descreve a ordem em que as operações são executadas uma expressão aritmética.

Multiplicação (*) e divisão (/) têm maior precedência do que adição (+) e subtração (-).

Como na matemática tradicional, a multiplicação é feita primeiro:

let x = 100 + 50 * 3;

Experimente você mesmo →

<!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>

Ao usar parênteses, as operações dentro dos parênteses são calculadas primeiro:

let x = (100 + 50) * 3;

Experimente você mesmo →

<!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>

Operações com a mesma precedência (como * e /) são calculadas da esquerda para a direita:

let x = 100 / 50 * 3;

Experimente você mesmo →

<!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>

Valores de precedência do operador

Expressões entre parênteses são calculadas antes do resto da expressão

As funções são executadas antes do resultado ser usado no restante da expressão

( )

Prioridade: 18

Agrupamento de Expressões

<!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>

Exemplo :

(100 + 50) * 3
.

Prioridade: 17

Membro de

<!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>

Exemplo :

person.name
[]

Prioridade: 17

Membro de

<!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>

Exemplo :

person["name"]
?.

Prioridade: 17

Encadeamento Opcional

<!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>

Exemplo :

x ?. y

Prioridade:

Exemplo :

()
Prioridade: 17
Chamada de função
<!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>

Exemplo :
myFunction()
new
Prioridade: 17
novo com argumentos
<!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>

Exemplo :
new Date("June 5,2022")
new
Prioridade: 16
novo sem argumentos
<!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>

Exemplo :
new Date()
Operadores de incremento
Incrementos postfix são executados antes dos incrementos de prefixo
++
Prioridade: 15
Incremento pós-fixado
<!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>

Exemplo :
i++
--
Prioridade: 15
Decremento pós-fixado
<!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>

Exemplo :
i--
++
Prioridade: 14
Incremento de prefixo
<!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>

Exemplo :
++i
--
Prioridade: 14
Decremento de prefixo
<!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>

Exemplo :
--i
NÃO Operadores
!
Prioridade: 14
Lógico NÃO
<!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>

Exemplo :
!(x==y)
~
Prioridade: 14
Bit a bit NÃO
<!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>

Exemplo :
~x
Operadores Unários
+
Prioridade: 14
Unário 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>

Exemplo :
+x
-
Prioridade: 14
Unário Menos
<!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>

Exemplo :
-x
typeof
Prioridade: 14
Tipo de dados
<!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>

Exemplo :
typeof x
void
Prioridade: 14
Avaliar Vazio
<!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>

Exemplo :
void(0)
delete
Prioridade: 14
Exclusão de propriedade
<!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>

Exemplo :
delete myCar.color
Operadores aritméticos
As exponenciações são executadas antes das multiplicações
Multiplicações e divisões são executadas antes de adições e subtrações
**
Prioridade: 13
Exponenciação
<!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>

Exemplo :
10 ** 2
*
Prioridade: 12
Multiplicação
<!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>

Exemplo :
10 * 5
/
Prioridade: 12
Divisão
<!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>

Exemplo :
10 / 5
%
Prioridade: 12
Restante da Divisão
<!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>

Exemplo :
10 % 5
+
Prioridade: 11
Adição
<!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>

Exemplo :
10 + 5
-
Prioridade: 11
Subtração
<!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>

Exemplo :
10 - 5
+
Prioridade: 11
Concatenação
<!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>

Exemplo :
"John" + "Doe"
Operadores de turno
<<
Prioridade: 10
Deslocar para a esquerda
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Bitwise Left</h1>
<h2>The &lt;&lt; Operator</h2>

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = 5 << 1;
</script>

</body>
</html>

Exemplo :
x << 2
>>
Prioridade: 10
Shift para a direita (assinado)
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Signed Bitwise Right</h1>
<h2>The &gt;&gt; Operator</h2>

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = -5 >> 1;
</script>

</body>
</html>

Exemplo :
x >> 2
>>>
Prioridade: 10
Shift Right (não assinado)
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Unsigned Bitwise Right</h1>
<h2>The &gt;&gt;&gt; Operator</h2>

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = 5 >>> 1;
</script>

</body>
</html>

Exemplo :
x >>> 2
Operadores Relacionais
in
Prioridade: 9
Propriedade no objeto
<!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>

Exemplo :
"PI" in Math
instanceof
Prioridade: 9
Instância do Objeto
<!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>

Exemplo :
x instanceof Array
Operadores de comparação
<
Prioridade: 9
Menor que
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Comparison</h1>
<h2>The &lt; Operator</h2>

<p>Assign 5 to x, and display the value of the comparison (x &lt; 8).</p>

<p id="demo"></p>

<script>
let x = 5;
document.getElementById("demo").innerHTML = (x < 8);
</script>

</body>
</html>

Exemplo :
x < y 
<=
Prioridade: 9
Menor ou igual
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Comparison</h1>
<h2>The &lt;= Operator</h2>

<p>Assign 5 to x, and display the value of the comparison (x &lt;= 8).</p>

<p id="demo"></p>

<script>
let x = 5;
document.getElementById("demo").innerHTML = (x <= 8);
</script>

</body>
</html>

Exemplo :
x <= y
>
Prioridade: 9
Maior que
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Comparison</h1>
<h2>The &gt; Operator</h2>

<p>Assign 5 to x, and display the value of the comparison (x &gt; 8).</p>
 
<p id="demo"></p>

<script>
let x = 5;
document.getElementById("demo").innerHTML = (x > 8);
</script>

</body>
</html>

Exemplo :
x > y
>=
Prioridade: 9
Maior ou igual
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Comparison</h1>
<h2>The &gt;= Operator</h2>

<p>Assign 5 to x, and display the value of the comparison (x &gt;= 8).</p>

<p id="demo"></p>

<script>
let x = 5;
document.getElementById("demo").innerHTML = (x >= 8);
</script>

</body>
</html>

Exemplo :
x >= Array
==
Prioridade: 8
Igual
<!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>

Exemplo :
x == y
===
Prioridade: 8
Estritamente igual
<!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>

Exemplo :
x === y
!=
Prioridade: 8
Desigual
<!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>

Exemplo :
x != y
!==
Prioridade: 8
Estritamente desigual
<!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>

Exemplo :
x !== y
Operadores bit a bit
&
Prioridade: 7
E bit a bit
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Bitwise AND</h1>
<h2>The &amp; Operator</h2>

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = 5 & 1;
</script>

</body>
</html> 

Exemplo :
x & y
^
Prioridade: 6
XOR bit a bit
<!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>

Exemplo :
x ^ y
|
Prioridade: 5
OU bit a bit
<!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>

Exemplo :
x | y
Operadores lógicos
&&
Prioridade: 4
Lógico E
<!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>

Exemplo :
x && y
||
Prioridade: 3
OU lógico
<!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>

Exemplo :
x || y
??
Prioridade: 3
Coalescência Nula
<!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>



Exemplo :
x ?? y
Operador Condicional (ternário)
? :
Prioridade: 2
Doença
<!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>

Exemplo :
? "yes" : "no"
Operadores de Atribuição
As atribuições são executadas após outras operações
=
Prioridade: 2
Atribuição Simples
<!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>

Exemplo :
x = y
:
Prioridade: 2
Atribuição de dois pontos
<!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>

Exemplo :
x: 5
+=
Prioridade: 2
Atribuição de adição
<!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>

Exemplo :
x += y
-=
Prioridade: 2
Atribuição de subtração
<!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>

Exemplo :
x -= y
*=
Prioridade: 2
Atribuição de multiplicação
<!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>

Exemplo :
x *= y
**=
Prioridade: 2
Atribuição de Exponenciação
<!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>

Exemplo :
x **= y
/=
Prioridade: 2
Atribuição de Divisão
<!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>

Exemplo :
x /= y
%=
Prioridade: 2
Atribuição restante
<!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>

Exemplo :
x %= y
<<=
Prioridade: 2
Atribuição de turno esquerdo
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Assignments</h1>
<h2>Left Shift Assignment</h2>
<h3>The &lt;&lt;= Operator</h3>

<p id="demo"></p>

<script>
let x = -100;
x <<= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>

</body>
</html>

Exemplo :
x <<= y
>>=
Prioridade: 2
Atribuição de deslocamento para a direita
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Assignments</h1>
<h2>Right Shift Assignment</h2>
<h3>The &gt;&gt;= Operator</h3>

<p id="demo"></p>

<script>
let x = -100;
x >>= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>

</body>
</html>

Exemplo :
x >>= y
>>>=
Prioridade: 2
Deslocamento para a direita não assinado
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Assignments</h1>
<h2>Right Shift Assignment</h2>
<h3>The &gt;&gt;&gt;= Operator</h3>

<p id="demo"></p>

<script>
let x = -100;
x >>>= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>

</body>
</html>

Exemplo :
x >>>= y
&=
Prioridade: 2
Bit a bit E Atribuição
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Assignments</h1>
<h2>Bitwise AND Assignment</h2>
<h3>The &amp;= Operator</h3>

<p id="demo"></p>

<script>
let x = 100;
x &= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>

</body>
</html>

Exemplo :
x &= y
|=
Prioridade: 2
Atribuição OU bit a bit
<!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>

Exemplo :
x |= y
^=
Prioridade: 2
Atribuição XOR bit a bit
<!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>

Exemplo :
x ^= y
&&=
Prioridade: 2
Atribuição Lógica E
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Assignments</h1>
<h2>Logical AND Assignment</h2>
<h3>The &amp;&amp;= Operator</h3>

<p id="demo"></p>

<script>
let x = 100;
x &&= 5;
document.getElementById("demo").innerHTML = "Value of x is: " + x;
</script>

</body>
</html>

Exemplo :
x &&= y
||=
Prioridade: 2
Atribuição OU Lógica
<!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>

Exemplo :
x ||= y
=>
Prioridade: 2
Seta
<!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>

Exemplo :
x => y
yield
Prioridade: 2
Pausar/Retomar
Exemplo :
yield x
yield*
Prioridade: 2
Delegar
Exemplo :
yield* x
...
Prioridade: 2
Espalhar
<!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>

Exemplo :
... x
,
Prioridade: 1
Vírgula
Exemplo :
x , y