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GeezerVison is showing developer.mozilla.org — WebAssembly.LinkError - WebAssembly | MDN

WebAssembly.LinkError

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.

  • See full compatibility
  • Learn more

The WebAssembly.LinkError object indicates an error during module instantiation (besides traps from the start function).

Constructor

WebAssembly.LinkError()

Creates a new WebAssembly.LinkError object.

Instance properties

WebAssembly.LinkError.prototype.message

Error message. Inherited from Error.

WebAssembly.LinkError.prototype.name

Error name. Inherited from Error.

WebAssembly.LinkError.prototype.cause

Error cause. Inherited from Error.

WebAssembly.LinkError.prototype.fileName

Path to file that raised this error. Inherited from Error.

WebAssembly.LinkError.prototype.lineNumber

Line number in file that raised this error. Inherited from Error.

WebAssembly.LinkError.prototype.columnNumber

Column number in line that raised this error. Inherited from Error.

WebAssembly.LinkError.prototype.stack

Stack trace. Inherited from Error.

Instance methods

WebAssembly.LinkError.prototype.toString()

Returns a string representing the specified Error object. Inherited from Error.

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 WebAssembly.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® 2027 Language Specification
# sec-native-error-types-used-in-this-standard

Browser compatibility

See also

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

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This page was last modified on Jul 9, 2026 by MDN contributors.

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