revision:
The Object.getOwnPropertySymbols() static method returns an array of all symbol properties found directly upon a given object.
Object.getOwnPropertySymbols(obj)
Parameters:
obj : required. The object whose symbol properties are to be returned.
const object1 = {};
const a = Symbol('a');
const b = Symbol.for('b');
object1[a] = 'localSymbol';
object1[b] = 'globalSymbol';
const objectSymbols = Object.getOwnPropertySymbols(object1);
console.log(objectSymbols.length);
// Expected output: 2
see console.log()
<div>
<p>see console.log()</p>
<p id="symbol-1"></p>
<p id="symbol-2"></p>
<p id="symbol-3"></p>
</div>
<script>
const obj = {};
const a = Symbol("a");
const b = Symbol.for("b");
obj[a] = "localSymbol";
obj[b] = "globalSymbol";
const objectSymbols = Object.getOwnPropertySymbols(obj);
console.log(objectSymbols.length); // 2
console.log(objectSymbols); // [Symbol(a), Symbol(b)]
console.log(objectSymbols[0]); // Symbol(a)
// document.getElementById("symbol-1").innerHTML = " length of symbols : " + objectSymbols.length;
// document.getElementById("symbol-2").innerHTML = " object symbols : " + toString(objectSymbols);
// document.getElementById("symbol-3").innerHTML = " object symbols : " + (objectSymbols[0]);
</script>
see console.log()
<div>
<p>see console.log()</p>
<p id="symbol-4"></p>
<p id="symbol-5"></p>
<p id="symbol-6"></p>
</div>
<script>
const symbol1 = Symbol('symbol1');
const symbol2 = Symbol('symbol2');
const object = {
property1: 'value1',
[symbol1]: 'value2',
[symbol2]: 'value3'
};
// get all the symbols of the obj
const symbols = Object.getOwnPropertySymbols(object);
console.log(symbols);
// Output: [ Symbol(symbol1), Symbol(symbol2) ]
// document.getElementById("symbol-4").innerHTML = " symbols : " + symbols;
</script>
examples: :
see console.log()
<div>
<p>see console.log()</p>
<p id="symbol-1"></p>
</div>
<script>
// create a symbol id
let id = Symbol("id");
// create a symbol name
let name = Symbol("name");
// create an object with
// symbol keys: id and name
// and string key: age
let superhero1 = {
[id]: 102,
[name]: "Bruce Wayne",
age: 40
};
// get all symbols of superhero1
let objectSymbols1 = Object.getOwnPropertySymbols(superhero1);
// print the symbols
console.log(objectSymbols1);
// Output: [ Symbol(id), Symbol(name) ]
</script>