WebAssembly.Table.prototype.get()

Syntax

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.

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

See also

• WebAssembly overview
• WebAssembly concepts
• Using the WebAssembly JavaScript API