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WebAssembly.CompileError

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.CompileError object indicates an error during WebAssembly decoding or validation.

In this article

Constructor

WebAssembly.CompileError()

Creates a new WebAssembly.CompileError object.

Instance properties

WebAssembly.CompileError.prototype.message

Error message. Inherited from Error.

WebAssembly.CompileError.prototype.name

Error name. Inherited from Error.

WebAssembly.CompileError.prototype.cause

Error cause. Inherited from Error.

WebAssembly.CompileError.prototype.fileName

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

WebAssembly.CompileError.prototype.lineNumber

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

WebAssembly.CompileError.prototype.columnNumber

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

WebAssembly.CompileError.prototype.stack

Stack trace. Inherited from Error.

Instance methods

WebAssembly.CompileError.prototype.toString()

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

Examples

Creating a new CompileError instance

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

js
try {
  throw new WebAssembly.CompileError("Hello", "someFile", 10);
} catch (e) {
  console.log(e instanceof CompileError); // true
  console.log(e.message); // "Hello"
  console.log(e.name); // "CompileError"
  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-compileerror

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

Browser compatibility

Enable JavaScript to view this browser compatibility table.

See also

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This page was last modified on Apr 22, 2025 by MDN contributors.

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