The get()
prototype method of the WebAssembly.Table()
object retrieves a function reference stored at a given index.
Syntax
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
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(function(obj) { var 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 The definition of 'get()' in that specification. |
Browser compatibility
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
get | Chrome Full support 57 | Edge Full support 16 | Firefox
Full support
52
| IE No support No | Opera Full support 44 | Safari Full support 11 | WebView Android Full support 57 | Chrome Android Full support 57 | Firefox Android
Full support
52
| Opera Android Full support 43 | Safari iOS Full support 11 | Samsung Internet Android Full support 7.0 | nodejs Full support 8.0.0 |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.
- See implementation notes.