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data/mdn-content/files/en-us/webassembly/javascript_interface/tag | data/mdn-content/files/en-us/webassembly/javascript_interface/tag/tag/index.md | ---
title: WebAssembly.Tag() constructor
slug: WebAssembly/JavaScript_interface/Tag/Tag
page-type: webassembly-constructor
browser-compat: webassembly.api.Tag.Tag
---
{{WebAssemblySidebar}}
The **`WebAssembly.Tag()`** constructor creates a new [`WebAssembly.Tag`](/en-US/docs/WebAssembly/JavaScript_interface/Tag) obje... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/tag | data/mdn-content/files/en-us/webassembly/javascript_interface/tag/type/index.md | ---
title: WebAssembly.Tag.prototype.type()
slug: WebAssembly/JavaScript_interface/Tag/type
page-type: webassembly-instance-method
browser-compat: webassembly.api.Tag.type
---
{{WebAssemblySidebar}}
The **`type()`** prototype method of the [`Tag`](/en-US/docs/WebAssembly/JavaScript_interface/Tag) object can be used t... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface | data/mdn-content/files/en-us/webassembly/javascript_interface/table/index.md | ---
title: WebAssembly.Table
slug: WebAssembly/JavaScript_interface/Table
page-type: webassembly-interface
browser-compat: webassembly.api.Table
---
{{WebAssemblySidebar}}
The **`WebAssembly.Table`** object is a JavaScript wrapper object — an array-like structure representing a WebAssembly table, which stores homogen... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/table | data/mdn-content/files/en-us/webassembly/javascript_interface/table/get/index.md | ---
title: WebAssembly.Table.prototype.get()
slug: WebAssembly/JavaScript_interface/Table/get
page-type: webassembly-instance-method
browser-compat: webassembly.api.Table.get
---
{{WebAssemblySidebar}}
The **`get()`** prototype method of the [`WebAssembly.Table()`](/en-US/docs/WebAssembly/JavaScript_interface/Table) ... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/table | data/mdn-content/files/en-us/webassembly/javascript_interface/table/length/index.md | ---
title: WebAssembly.Table.prototype.length
slug: WebAssembly/JavaScript_interface/Table/length
page-type: webassembly-instance-property
browser-compat: webassembly.api.Table.length
---
{{WebAssemblySidebar}}
The read-only **`length`** prototype property of the [`WebAssembly.Table`](/en-US/docs/WebAssembly/JavaScri... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/table | data/mdn-content/files/en-us/webassembly/javascript_interface/table/set/index.md | ---
title: WebAssembly.Table.prototype.set()
slug: WebAssembly/JavaScript_interface/Table/set
page-type: webassembly-instance-method
browser-compat: webassembly.api.Table.set
---
{{WebAssemblySidebar}}
The **`set()`** prototype method of the [`WebAssembly.Table`](/en-US/docs/WebAssembly/JavaScript_interface/Table) ob... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/table | data/mdn-content/files/en-us/webassembly/javascript_interface/table/table/index.md | ---
title: WebAssembly.Table() constructor
slug: WebAssembly/JavaScript_interface/Table/Table
page-type: webassembly-constructor
browser-compat: webassembly.api.Table.Table
---
{{WebAssemblySidebar}}
The **`WebAssembly.Table()`** constructor creates a new `Table` object of the given size and element type, filled with... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/table | data/mdn-content/files/en-us/webassembly/javascript_interface/table/grow/index.md | ---
title: WebAssembly.Table.prototype.grow()
slug: WebAssembly/JavaScript_interface/Table/grow
page-type: webassembly-instance-method
browser-compat: webassembly.api.Table.grow
---
{{WebAssemblySidebar}}
The **`grow()`** prototype method of the [`WebAssembly.Table`](/en-US/docs/WebAssembly/JavaScript_interface/Table... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface | data/mdn-content/files/en-us/webassembly/javascript_interface/linkerror/index.md | ---
title: WebAssembly.LinkError
slug: WebAssembly/JavaScript_interface/LinkError
page-type: webassembly-interface
browser-compat: webassembly.api.LinkError
---
{{WebAssemblySidebar}}
The **`WebAssembly.LinkError`** object indicates an error during module instantiation (besides [traps](https://webassembly.github.io/s... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/linkerror | data/mdn-content/files/en-us/webassembly/javascript_interface/linkerror/linkerror/index.md | ---
title: WebAssembly.LinkError() constructor
slug: WebAssembly/JavaScript_interface/LinkError/LinkError
page-type: webassembly-constructor
browser-compat: webassembly.api.LinkError.LinkError
---
{{WebAssemblySidebar}}
The **`WebAssembly.LinkError()`** constructor creates a new
WebAssembly `LinkError` object, which ... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface | data/mdn-content/files/en-us/webassembly/javascript_interface/compile_static/index.md | ---
title: WebAssembly.compile()
slug: WebAssembly/JavaScript_interface/compile_static
page-type: webassembly-function
browser-compat: webassembly.api.compile_static
---
{{WebAssemblySidebar}}
The **`WebAssembly.compile()`** static method compiles WebAssembly binary code into a [`WebAssembly.Module`](/en-US/docs/WebA... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface | data/mdn-content/files/en-us/webassembly/javascript_interface/instantiatestreaming_static/index.md | ---
title: WebAssembly.instantiateStreaming()
slug: WebAssembly/JavaScript_interface/instantiateStreaming_static
page-type: webassembly-function
browser-compat: webassembly.api.instantiateStreaming_static
---
{{WebAssemblySidebar}}
The **`WebAssembly.instantiateStreaming()`** static method compiles
and instantiates a... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface | data/mdn-content/files/en-us/webassembly/javascript_interface/validate_static/index.md | ---
title: WebAssembly.validate()
slug: WebAssembly/JavaScript_interface/validate_static
page-type: webassembly-function
browser-compat: webassembly.api.validate_static
---
{{WebAssemblySidebar}}
The **`WebAssembly.validate()`** static method validates a given [typed array](/en-US/docs/Web/JavaScript/Guide/Typed_arra... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface | data/mdn-content/files/en-us/webassembly/javascript_interface/instantiate_static/index.md | ---
title: WebAssembly.instantiate()
slug: WebAssembly/JavaScript_interface/instantiate_static
page-type: webassembly-function
browser-compat: webassembly.api.instantiate_static
---
{{WebAssemblySidebar}}
The **`WebAssembly.instantiate()`** function allows you to
compile and instantiate WebAssembly code. This functio... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface | data/mdn-content/files/en-us/webassembly/javascript_interface/global/index.md | ---
title: WebAssembly.Global
slug: WebAssembly/JavaScript_interface/Global
page-type: webassembly-interface
browser-compat: webassembly.api.Global
---
{{WebAssemblySidebar}}
A **`WebAssembly.Global`** object represents a global variable instance, accessible from both JavaScript and importable/exportable across one o... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/global | data/mdn-content/files/en-us/webassembly/javascript_interface/global/global/index.md | ---
title: WebAssembly.Global() constructor
slug: WebAssembly/JavaScript_interface/Global/Global
page-type: webassembly-constructor
browser-compat: webassembly.api.Global.Global
---
{{WebAssemblySidebar}}
A **`WebAssembly.Global()`** constructor creates a new `Global` object representing a global variable instance, a... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface | data/mdn-content/files/en-us/webassembly/javascript_interface/memory/index.md | ---
title: WebAssembly.Memory
slug: WebAssembly/JavaScript_interface/Memory
page-type: webassembly-interface
browser-compat: webassembly.api.Memory
---
{{WebAssemblySidebar}}
The **`WebAssembly.Memory`** object is a resizable {{jsxref("ArrayBuffer")}} or {{jsxref("SharedArrayBuffer")}} that holds the raw bytes of mem... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/memory | data/mdn-content/files/en-us/webassembly/javascript_interface/memory/buffer/index.md | ---
title: WebAssembly.Memory.prototype.buffer
slug: WebAssembly/JavaScript_interface/Memory/buffer
page-type: webassembly-instance-property
browser-compat: webassembly.api.Memory.buffer
---
{{WebAssemblySidebar}}
The read-only **`buffer`** prototype property of the [`WebAssembly.Memory`](/en-US/docs/WebAssembly/Java... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/memory | data/mdn-content/files/en-us/webassembly/javascript_interface/memory/grow/index.md | ---
title: WebAssembly.Memory.prototype.grow()
slug: WebAssembly/JavaScript_interface/Memory/grow
page-type: webassembly-instance-method
browser-compat: webassembly.api.Memory.grow
---
{{WebAssemblySidebar}}
The **`grow()`** prototype method of the [`WebAssembly.Memory`](/en-US/docs/WebAssembly/JavaScript_interface/M... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/memory | data/mdn-content/files/en-us/webassembly/javascript_interface/memory/memory/index.md | ---
title: WebAssembly.Memory() constructor
slug: WebAssembly/JavaScript_interface/Memory/Memory
page-type: webassembly-constructor
browser-compat: webassembly.api.Memory.Memory
---
{{WebAssemblySidebar}}
The **`WebAssembly.Memory()`** constructor creates a new `Memory` object whose [`buffer`](/en-US/docs/WebAssembly... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface | data/mdn-content/files/en-us/webassembly/javascript_interface/module/index.md | ---
title: WebAssembly.Module
slug: WebAssembly/JavaScript_interface/Module
page-type: webassembly-interface
browser-compat: webassembly.api.Module
---
{{WebAssemblySidebar}}
A **`WebAssembly.Module`** object contains stateless WebAssembly code that has already been compiled by the browser — this can be efficiently [... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/module | data/mdn-content/files/en-us/webassembly/javascript_interface/module/customsections_static/index.md | ---
title: WebAssembly.Module.customSections()
slug: WebAssembly/JavaScript_interface/Module/customSections_static
page-type: webassembly-static-method
browser-compat: webassembly.api.Module.customSections_static
---
{{WebAssemblySidebar}}
The **`WebAssembly.Module.customSections()`** static method returns a copy
of ... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/module | data/mdn-content/files/en-us/webassembly/javascript_interface/module/exports_static/index.md | ---
title: WebAssembly.Module.exports()
slug: WebAssembly/JavaScript_interface/Module/exports_static
page-type: webassembly-static-method
browser-compat: webassembly.api.Module.exports_static
---
{{WebAssemblySidebar}}
The **`WebAssembly.Module.exports()`** static method returns an
array containing descriptions of al... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/module | data/mdn-content/files/en-us/webassembly/javascript_interface/module/imports_static/index.md | ---
title: WebAssembly.Module.imports()
slug: WebAssembly/JavaScript_interface/Module/imports_static
page-type: webassembly-static-method
browser-compat: webassembly.api.Module.imports_static
---
{{WebAssemblySidebar}}
The **`WebAssembly.Module.imports()`** static method returns an array
containing descriptions of al... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/module | data/mdn-content/files/en-us/webassembly/javascript_interface/module/module/index.md | ---
title: WebAssembly.Module() constructor
slug: WebAssembly/JavaScript_interface/Module/Module
page-type: webassembly-constructor
browser-compat: webassembly.api.Module.Module
---
{{WebAssemblySidebar}}
A **`WebAssembly.Module()`** constructor creates a new Module
object containing stateless WebAssembly code that h... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface | data/mdn-content/files/en-us/webassembly/javascript_interface/compileerror/index.md | ---
title: WebAssembly.CompileError
slug: WebAssembly/JavaScript_interface/CompileError
page-type: webassembly-interface
browser-compat: webassembly.api.CompileError
---
{{WebAssemblySidebar}}
The **`WebAssembly.CompileError`** object indicates an error during WebAssembly decoding or validation.
## Constructor
- [`... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/compileerror | data/mdn-content/files/en-us/webassembly/javascript_interface/compileerror/compileerror/index.md | ---
title: WebAssembly.CompileError() constructor
slug: WebAssembly/JavaScript_interface/CompileError/CompileError
page-type: webassembly-constructor
browser-compat: webassembly.api.CompileError.CompileError
---
{{WebAssemblySidebar}}
The **`WebAssembly.CompileError()`** constructor creates a new
WebAssembly `Compile... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface | data/mdn-content/files/en-us/webassembly/javascript_interface/instance/index.md | ---
title: WebAssembly.Instance
slug: WebAssembly/JavaScript_interface/Instance
page-type: webassembly-interface
browser-compat: webassembly.api.Instance
---
{{WebAssemblySidebar}}
A **`WebAssembly.Instance`** object is a stateful, executable instance of a [`WebAssembly.Module`](/en-US/docs/WebAssembly/JavaScript_int... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/instance | data/mdn-content/files/en-us/webassembly/javascript_interface/instance/exports/index.md | ---
title: WebAssembly.Instance.prototype.exports
slug: WebAssembly/JavaScript_interface/Instance/exports
page-type: webassembly-instance-property
browser-compat: webassembly.api.Instance.exports
---
{{WebAssemblySidebar}}
The **`exports`** readonly property of the
[`WebAssembly.Instance`](/en-US/docs/WebAssembly/Jav... | 0 |
data/mdn-content/files/en-us/webassembly/javascript_interface/instance | data/mdn-content/files/en-us/webassembly/javascript_interface/instance/instance/index.md | ---
title: WebAssembly.Instance() constructor
slug: WebAssembly/JavaScript_interface/Instance/Instance
page-type: webassembly-constructor
browser-compat: webassembly.api.Instance.Instance
---
{{WebAssemblySidebar}}
The **`WebAssembly.Instance()`** constructor creates a new
`Instance` object which is a stateful, execu... | 0 |
data/mdn-content/files/en-us/webassembly | data/mdn-content/files/en-us/webassembly/exported_functions/index.md | ---
title: Exported WebAssembly functions
slug: WebAssembly/Exported_functions
page-type: guide
---
{{WebAssemblySidebar}}
Exported WebAssembly functions are how WebAssembly functions are represented in JavaScript. This article describes what they are in a little more detail.
## Exported… What?
Exported WebAssembly... | 0 |
data/mdn-content/files/en-us/webassembly | data/mdn-content/files/en-us/webassembly/text_format_to_wasm/index.md | ---
title: Converting WebAssembly text format to Wasm
slug: WebAssembly/Text_format_to_Wasm
page-type: guide
---
{{WebAssemblySidebar}}
WebAssembly has an S-expression-based textual representation, an intermediate form designed to be exposed in text editors, browser developer tools, etc. This article explains a littl... | 0 |
data/mdn-content/files/en-us/webassembly | data/mdn-content/files/en-us/webassembly/rust_to_wasm/index.md | ---
title: Compiling from Rust to WebAssembly
slug: WebAssembly/Rust_to_Wasm
page-type: guide
---
{{WebAssemblySidebar}}
If you have some Rust code, you can compile it into [WebAssembly](/en-US/docs/WebAssembly) (Wasm). This tutorial will show you how to compile a Rust project into WebAssembly and use it in an existi... | 0 |
data/mdn-content/files/en-us/webassembly | data/mdn-content/files/en-us/webassembly/existing_c_to_wasm/index.md | ---
title: Compiling an Existing C Module to WebAssembly
slug: WebAssembly/existing_C_to_Wasm
page-type: guide
---
{{WebAssemblySidebar}}
A core use-case for WebAssembly is to take the existing ecosystem of C libraries and allow developers to use them on the web.
These libraries often rely on C's standard library, a... | 0 |
data/mdn-content/files/en-us/webassembly | data/mdn-content/files/en-us/webassembly/concepts/index.md | ---
title: WebAssembly Concepts
slug: WebAssembly/Concepts
page-type: guide
---
{{WebAssemblySidebar}}
This article explains the concepts behind how WebAssembly works including its goals, the problems it solves, and how it runs inside the web browser's JavaScript engine.
## What is WebAssembly?
WebAssembly is a new... | 0 |
data/mdn-content/files/en-us/webassembly | data/mdn-content/files/en-us/webassembly/using_the_javascript_api/index.md | ---
title: Using the WebAssembly JavaScript API
slug: WebAssembly/Using_the_JavaScript_API
page-type: guide
---
{{WebAssemblySidebar}}
If you have already [compiled a module from another language using tools like Emscripten](/en-US/docs/WebAssembly/C_to_Wasm), or [loaded and run the code yourself](/en-US/docs/WebAsse... | 0 |
data/mdn-content/files/en-us/webassembly | data/mdn-content/files/en-us/webassembly/reference/index.md | ---
title: WebAssembly instruction reference
slug: WebAssembly/Reference
page-type: landing-page
---
{{WebAssemblySidebar}}
- [`Numeric instructions`](/en-US/docs/WebAssembly/Reference/Numeric)
- [`Vector/SIMD instructions`](/en-US/docs/WebAssembly/Reference/Vector)
- [`Reference instructions`](/en-US/docs/WebAssembl... | 0 |
data/mdn-content/files/en-us/webassembly/reference | data/mdn-content/files/en-us/webassembly/reference/control_flow/index.md | ---
title: WebAssembly control flow instructions
slug: WebAssembly/Reference/Control_flow
page-type: landing-page
---
{{WebAssemblySidebar}}
WebAssembly control flow instructions.
- [`block`](/en-US/docs/WebAssembly/Reference/Control_flow/block)
- : Creates a label that can later be branched out of with a [`br`](/... | 0 |
data/mdn-content/files/en-us/webassembly/reference/control_flow | data/mdn-content/files/en-us/webassembly/reference/control_flow/br/index.md | ---
title: br
slug: WebAssembly/Reference/Control_flow/br
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
The **`br`** statement branches to a loop, block, or if.
Other variants of `br` are `br_if` for branching on condition, and `br_table` for branching to different blocks based on an argument.
{{Emb... | 0 |
data/mdn-content/files/en-us/webassembly/reference/control_flow | data/mdn-content/files/en-us/webassembly/reference/control_flow/return/index.md | ---
title: return
slug: WebAssembly/Reference/Control_flow/return
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
**`return`** returns from a function.
- If there are no values left on the stack, it returns nothing/void.
- If there are the same amount of values left on the stack as specified in the fun... | 0 |
data/mdn-content/files/en-us/webassembly/reference/control_flow | data/mdn-content/files/en-us/webassembly/reference/control_flow/call/index.md | ---
title: call
slug: WebAssembly/Reference/Control_flow/call
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
**`call`** calls a function, `return_call` being the tail-call version of it. `call_indirect` calls a function in a table with the `return_call_indirect` tail-call version as well.
{{EmbedInter... | 0 |
data/mdn-content/files/en-us/webassembly/reference/control_flow | data/mdn-content/files/en-us/webassembly/reference/control_flow/select/index.md | ---
title: Select
slug: WebAssembly/Reference/Control_flow/Select
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
The **`select`** instruction, selects one of its first two operands based on whether its third operand is zero or not. It shares some similarities with the ternary operator in other language... | 0 |
data/mdn-content/files/en-us/webassembly/reference/control_flow | data/mdn-content/files/en-us/webassembly/reference/control_flow/nop/index.md | ---
title: nop
slug: WebAssembly/Reference/Control_flow/nop
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
**`nop`** stands for no-operation. It literally does nothing.
{{EmbedInteractiveExample("pages/wat/nop.html", "tabbed-shorter")}}
## Syntax
```wasm
nop
```
| Instruction | Binary opcode |
| --... | 0 |
data/mdn-content/files/en-us/webassembly/reference/control_flow | data/mdn-content/files/en-us/webassembly/reference/control_flow/loop/index.md | ---
title: loop
slug: WebAssembly/Reference/Control_flow/loop
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
The **`loop`** statement creates a label that can later be branched to with a `br`. The loop instruction doesn't loop by itself; you need to branch to it to actually create a loop.
The **`loop`... | 0 |
data/mdn-content/files/en-us/webassembly/reference/control_flow | data/mdn-content/files/en-us/webassembly/reference/control_flow/end/index.md | ---
title: end
slug: WebAssembly/Reference/Control_flow/end
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
**`end`** is used to end a `block`, `loop`, `if`, or `else`. In the other examples we used the s-expression syntax which doesn't require the `end`, so you won't find it in the other examples here.... | 0 |
data/mdn-content/files/en-us/webassembly/reference/control_flow | data/mdn-content/files/en-us/webassembly/reference/control_flow/unreachable/index.md | ---
title: unreachable
slug: WebAssembly/Reference/Control_flow/unreachable
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
**`unreachable`** is used to denote a point in code that should not be reachable. `unreachable` is an unconditional trap: in the case where an `unreachable` is reached and executed... | 0 |
data/mdn-content/files/en-us/webassembly/reference/control_flow | data/mdn-content/files/en-us/webassembly/reference/control_flow/if...else/index.md | ---
title: if...else
slug: WebAssembly/Reference/Control_flow/if...else
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
The **`if`** statement executes a statement if the last item on the stack is true (1). If the condition is false (0), another statement can be executed
{{EmbedInteractiveExample("page... | 0 |
data/mdn-content/files/en-us/webassembly/reference/control_flow | data/mdn-content/files/en-us/webassembly/reference/control_flow/drop/index.md | ---
title: Drop
slug: WebAssembly/Reference/Control_flow/Drop
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
The **`drop`** instruction, pops a value from the stack, and discards it.
{{EmbedInteractiveExample("pages/wat/drop.html", "tabbed-taller")}}
## Syntax
```wasm
;; push multiple values onto th... | 0 |
data/mdn-content/files/en-us/webassembly/reference/control_flow | data/mdn-content/files/en-us/webassembly/reference/control_flow/block/index.md | ---
title: block
slug: WebAssembly/Reference/Control_flow/block
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
The **`block`** statement creates a label that can later be branched out of with a `br`.
The **`loop`** statement is the opposite of the `block` statement, in the sense that while branching t... | 0 |
data/mdn-content/files/en-us/webassembly/reference | data/mdn-content/files/en-us/webassembly/reference/memory/index.md | ---
title: WebAssembly memory instructions
slug: WebAssembly/Reference/Memory
page-type: landing-page
---
{{WebAssemblySidebar}}
WebAssembly memory instructions.
- [`Grow`](/en-US/docs/WebAssembly/Reference/Memory/Grow)
- : Increase the size of the memory instance.
- [`Size`](/en-US/docs/WebAssembly/Reference/Memo... | 0 |
data/mdn-content/files/en-us/webassembly/reference/memory | data/mdn-content/files/en-us/webassembly/reference/memory/store/index.md | ---
title: Store
slug: WebAssembly/Reference/Memory/Store
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
The **`store`** instructions, are used to store a number in memory.
For the integer numbers, you can also store a wide typed number as a narrower number in memory, e.g. store a 32-bit number in an ... | 0 |
data/mdn-content/files/en-us/webassembly/reference/memory | data/mdn-content/files/en-us/webassembly/reference/memory/grow/index.md | ---
title: Grow
slug: WebAssembly/Reference/Memory/Grow
page-type: webassembly-instruction
---
{{WebAssemblySidebar}}
The **`grow`** instruction, increases the size of the memory instance by a specified number of pages, each page is sized 64KiB.
The **`grow`** instruction returns previous size of memory, in pages, i... | 0 |
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