WebAssembly.Memory.prototype.grow()
The grow()
prototype method of the
Memory
object increases the size of the memory instance by a specified number of WebAssembly
pages.
Syntax
grow(number)
Parameters
- number
-
The number of WebAssembly pages you want to grow the memory by (each one is 64KiB in size).
Return value
The previous size of the memory, in units of WebAssembly pages.
Examples
Using grow
The following example creates a new WebAssembly Memory instance with an initial size of 1 page (64KiB), and a maximum size of 10 pages (640KiB).
var memory = new WebAssembly.Memory({initial:1, maximum:10});
We can then grow the instance by one page like so:
const bytesPerPage = 64 * 1024;
console.log(memory.buffer.byteLength / bytesPerPage); // "1"
console.log(memory.grow(1)); // "1"
console.log(memory.buffer.byteLength / bytesPerPage); // "2"
Note the return value of grow()
here is the previous number of WebAssembly
pages.
Specifications
Specification |
---|
WebAssembly JavaScript Interface # dom-memory-grow |
Browser compatibility
BCD tables only load in the browser