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 length prototype property of the WebAssembly.Table object returns the length of the table, i.e. the number of elements in the table.
Syntax
table.length;
Examples
The following example creates a new WebAssembly Table instance with an initial size of 2 and a maximum size of 10.
var table = new WebAssembly.Table({ element: "anyfunc", initial: 2, maximum: 10 });
You can then grow the table by 1 with the following:
console.log(table.length); // "2" console.log(table.grow(1)); // "2" console.log(table.length); // "3"
Specifications
| Specification | Status | Comment |
|---|---|---|
| Web Assembly JavaScript API The definition of 'length' 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.