WebAssembly.LinkError() constructor

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since October 2017.

The WebAssembly.LinkError() constructor creates a new WebAssembly LinkError object, which indicates an error during module instantiation (besides traps from the start function).

Syntax

js
new WebAssembly.LinkError()
new WebAssembly.LinkError(message)
new WebAssembly.LinkError(message, options)
new WebAssembly.LinkError(message, fileName)
new WebAssembly.LinkError(message, fileName, lineNumber)

Parameters

message Optional

Human-readable description of the error.

options Optional

An object that has the following properties:

cause Optional

A property indicating the specific cause of the error. When catching and re-throwing an error with a more-specific or useful error message, this property can be used to pass the original error.

fileName Optional

The name of the file containing the code that caused the exception.

lineNumber Optional

The line number of the code that caused the exception.

Examples

Creating a new LinkError instance

The following snippet creates a new LinkError instance, and logs its details to the console:

js
try {
  throw new WebAssembly.LinkError("Hello", "someFile", 10);
} catch (e) {
  console.log(e instanceof LinkError); // true
  console.log(e.message); // "Hello"
  console.log(e.name); // "LinkError"
  console.log(e.fileName); // "someFile"
  console.log(e.lineNumber); // 10
  console.log(e.columnNumber); // 0
  console.log(e.stack); // returns the location where the code was run
}

Specifications

Specification
WebAssembly JavaScript Interface
# exceptiondef-linkerror
ECMAScript Language Specification
# sec-nativeerror-constructors

Browser compatibility

BCD tables only load in the browser

See also