WebAssembly.Table.prototype.get()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since October 2017.

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

Syntax

js
get(index)

Parameters

index

The index of the element you want to retrieve.

Return value

Depending the element type of the Table, can be a function reference — this is an exported WebAssembly function, a JavaScript wrapper for an underlying Wasm function, or it can be a host reference.

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.

js
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

Specification
WebAssembly JavaScript Interface
# dom-table-get

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
get

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

See also