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@@ -599,7 +599,7 @@ added: v5.10.0 | |||
| 599 | 599 | This creates a view of the [`ArrayBuffer`][] without copying the underlying | |
| 600 | 600 | memory. For example, when passed a reference to the `.buffer` property of a | |
| 601 | 601 | [`TypedArray`][] instance, the newly created `Buffer` will share the same | |
| 602 | - allocated memory as the [`TypedArray`][]. | ||
| 602 | + allocated memory as the [`TypedArray`][]'s underlying `ArrayBuffer`. | ||
| 603 | 603 | ||
| 604 | 604 | ```js | |
| 605 | 605 | const arr = new Uint16Array(2); | |
@@ -635,6 +635,21 @@ A `TypeError` will be thrown if `arrayBuffer` is not an [`ArrayBuffer`][] or a | |||
| 635 | 635 | [`SharedArrayBuffer`][] or another type appropriate for `Buffer.from()` | |
| 636 | 636 | variants. | |
| 637 | 637 | ||
| 638 | + It is important to remember that a backing `ArrayBuffer` can cover a range | ||
| 639 | + of memory that extends beyond the bounds of a `TypedArray` view. A new | ||
| 640 | + `Buffer` created using the `buffer` property of a `TypedArray` may extend | ||
| 641 | + beyond the range of the `TypedArray`: | ||
| 642 | + | ||
| 643 | + ```js | ||
| 644 | + const arrA = Uint8Array.from([0x63, 0x64, 0x65, 0x66]); // 4 elements | ||
| 645 | + const arrB = new Uint8Array(arrA.buffer, 1, 2); // 2 elements | ||
| 646 | + console.log(arrA.buffer === arrB.buffer); // true | ||
| 647 | + | ||
| 648 | + const buf = Buffer.from(arrB.buffer); | ||
| 649 | + console.log(buf); | ||
| 650 | + // Prints: <Buffer 63 64 65 66> | ||
| 651 | + ``` | ||
| 652 | + | ||
| 638 | 653 | ### Static method: `Buffer.from(buffer)` | |
| 639 | 654 | <!-- YAML | |
| 640 | 655 | added: v5.10.0 | |
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