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This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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

Syntax

var funcRef = table.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

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

fetchAndInstantiate('table.wasm').then(function(instance) {
  var tbl = 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 Status Comment
Web Assembly JavaScript API
The definition of 'get()' in that specification.
Draft Initial draft definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic Support5716522 No4411
FeatureAndroidChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic Support5757 (Yes)1522 No ?11

1. , this feature is behind the Experimental JavaScript Features preference.

2. Disabled in the Firefox 52 Extended Support Release (ESR).

See also

Document Tags and Contributors

 Contributors to this page: fscholz, chrisdavidmills
 Last updated by: fscholz,