Array.of()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. Itโs been available across browsers since โจ2015ๅนด9ๆโฉ.
Array.of() ้ๆๆนๆณ้่ฟๅฏๅๆฐ้็ๅๆฐๅๅปบไธไธชๆฐ็ Array ๅฎไพ๏ผ่ไธ่่ๅๆฐ็ๆฐ้ๆ็ฑปๅใ
ๅฐ่ฏไธไธ
console.log(Array.of("foo", 2, "bar", true));
// Expected output: Array ["foo", 2, "bar", true]
console.log(Array.of());
// Expected output: Array []
่ฏญๆณ
Array.of()
Array.of(element0)
Array.of(element0, element1)
Array.of(element0, element1, /* โฆ ,*/ elementN)
ๅๆฐ
elementN-
็จไบๅๅปบๆฐ็ป็ๅ ็ด ใ
่ฟๅๅผ
ๆฐ็ Array ๅฎไพใ
ๆ่ฟฐ
Array.of() ๅ Array() ๆ้ ๅฝๆฐไน้ด็ๅบๅซๅจไบๅฏนๅไธชๅๆฐ็ๅค็๏ผArray.of(7) ๅๅปบไธไธชๅ
ทๆๅไธชๅ
็ด 7 ็ๆฐ็ป๏ผ่ Array(7) ๅๅปบไธไธช length ไธบ 7 ็็ฉบๆฐ็ป๏ผ่ฟๆๅณ็ไธไธช็ฑ 7 ไธช็ฉบๆงฝ็ปๆ็ๆฐ็ป๏ผ่ไธๆฏ็ฑ 7 ไธช undefined ็ปๆ็ๆฐ็ป๏ผใ
Array.of(7); // [7]
Array(7); // ็ฑ 7 ไธช็ฉบๆงฝ็ปๆ็ๆฐ็ป
Array.of(1, 2, 3); // [1, 2, 3]
Array(1, 2, 3); // [1, 2, 3]
Array.of() ๆนๆณๆฏไธไธช้็จ็ๅทฅๅๆนๆณใไพๅฆ๏ผๅฆๆ Array ็ๅญ็ฑป็ปงๆฟไบ of() ๆนๆณ๏ผ็ปงๆฟ็ of() ๆนๆณๅฐ่ฟๅๅญ็ฑป็ๆฐๅฎไพ่ไธๆฏ Array ๅฎไพใไบๅฎไธ๏ผthis ๅผๅฏไปฅๆฏไปปไฝๆฅๅๅไธชๅๆฐ่กจ็คบๆฐๆฐ็ป้ฟๅบฆ็ๆ้ ๅฝๆฐ๏ผๅนถไธๆ้ ๅฝๆฐๅฐไธไผ ้็ป of() ็ๅๆฐๆฐ้ไธ่ตท่ขซ่ฐ็จใๅฝๆๆๅ
็ด ้ฝ่ขซๅ้
ๆถ๏ผๆ็ป็ length ๅฐๅๆฌก่ฎพ็ฝฎใๅฆๆ this ๅผไธๆฏๆ้ ๅฝๆฐ๏ผๅๆน็จๆฎ้็ Array ๆ้ ๅฝๆฐใ
็คบไพ
ไฝฟ็จ Array.of()
Array.of(1); // [1]
Array.of(1, 2, 3); // [1, 2, 3]
Array.of(undefined); // [undefined]
้ๆฐ็ปๆ้ ๅฝๆฐ่ฐ็จ of()
of() ๆนๆณๅฏไปฅๅจไปปไฝๆฅๅๅไธชๅๆฐ่กจ็คบๆฐๆฐ็ป้ฟๅบฆ็ๆ้ ๅฝๆฐไธ่ฐ็จใ
function NotArray(len) {
console.log("NotArray called with length", len);
}
console.log(Array.of.call(NotArray, 1, 2, 3));
// NotArray called with length 3
// NotArray { '0': 1, '1': 2, '2': 3, length: 3 }
console.log(Array.of.call(Object)); // [Number: 0] { length: 0 }
ๅฝ this ๅผไธๆฏๆ้ ๅฝๆฐๆถ๏ผ่ฟๅไธไธชๆฎ้็ Array ๅฏน่ฑกใ
console.log(Array.of.call({}, 1)); // [ 1 ]
่ง่
| Specification |
|---|
| ECMAScriptยฎ 2026 Language Specification # sec-array.of |
ๆต่งๅจๅ ผๅฎนๆง
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