This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The WebAssembly.imports() function returns an array containing descriptions of all the declared imports of the given Module.
Syntax
var custSec = WebAssembly.Module.imports(module);
Parameters
- module
- A
WebAssembly.Moduleobject.
Return value
An array containing objects representing the imported functions of the given module.
Exceptions
If module is not a WebAssembly.Module object instance, a TypeError is thrown.
Example
The following example (see imports.html source code; see it live also) compiles the loaded simple.wasm module. This module is then queried for its imports.
fetch('simple.wasm').then(response =>
response.arrayBuffer()
).then(bytes =>
WebAssembly.compile(bytes)
).then(function(mod) {
var imports = WebAssembly.Module.imports(mod);
console.log(imports[0]);
});
The output looks like this:
{ module: "imports", name: "imported_func", kind: "function" }
Specifications
| Specification | Status | Comment |
|---|---|---|
| Web Assembly JavaScript API The definition of 'imports()' in that specification. |
Draft | Initial draft definition. |
Browser compatibility
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | 57 | 15[2] | 52 (52)[1] | No support | 44 | 11 |
| Feature | Chrome for Android | Android Webview | Edge Mobile | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | 57 | 57 | No support | 52.0 (52)[1] | No support | No support | 11 |
[1] WebAssembly is enabled in Firefox 52+, although disabled in the Firefox 52 Extended Support Release (ESR.)
[2] Currently supported behind the “Experimental JavaScript Features” flag. See this blog post for more details.