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WebAssembly.Table.prototype.get()

The get() prototype method of the WebAssembly.Table() object retrieves a function reference stored at a given index.

Syntax

get(index)

Parameters

index

The index of the function reference you want to retrieve.

Return value

A function reference — this is an exported WebAssembly function, a JavaScript wrapper for an underlying wasm function.

Exceptions

If index is greater than or equal to Table.prototype.length, a RangeError is thrown.

Examples

Using get

The following example (see table.html on GitHub, and view it live also) compiles and instantiates the loaded table.wasm byte code using the WebAssembly.instantiateStreaming() method. It then retrieves the references stored in the exported table.

WebAssembly.instantiateStreaming(fetch('table.wasm'))
  .then((obj) => {
    const tbl = obj.instance.exports.tbl;
    console.log(tbl.get(0)());  // 13
    console.log(tbl.get(1)());  // 42
  });

Note how you've got to include a second function invocation operator at the end of the accessor to actually retrieve the value stored inside the reference (e.g. get(0)() rather than get(0)) — it is a function rather than a simple value.

Specifications

Browser compatibility

Desktop Mobile Server
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet Deno Node.js
get
57
16
52
No
44
11
57
57
52
43
11
7.0
1.0
8.0.0

See also

© 2005–2022 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/get