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WebAssembly.runtimeError

The WebAssembly.RuntimeError() constructor creates a new WebAssembly RuntimeError object — the type that is thrown whenever WebAssembly specifies a trap.

Syntax

new WebAssembly.RuntimeError(message, fileName, lineNumber)

Parameters

message Optional
Human-readable description of the 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.

Properties

The RuntimeError constructor contains no unique properties of its own, however, it does inherit some properties through the prototype chain.

WebAssembly.RuntimeError.prototype.constructor
Specifies the function that created an instance's prototype.
WebAssembly.RuntimeError.prototype.message
Error message. Although ECMA-262 specifies that URIError should provide its own message property, in SpiderMonkey, it inherits Error.prototype.message.
WebAssembly.RuntimeError.prototype.name
Error name. Inherited from Error.
WebAssembly.RuntimeError.prototype.fileName
Path to file that raised this error. Inherited from Error.
WebAssembly.RuntimeError.prototype.lineNumber
Line number in file that raised this error. Inherited from Error.
WebAssembly.RuntimeError.prototype.columnNumber
Column number in line that raised this error. Inherited from Error.
WebAssembly.RuntimeError.prototype.stack
Stack trace. Inherited from Error.

Methods

The RuntimeError constructor contains no methods of its own, however, it does inherit some methods through the prototype chain.

WebAssembly.RuntimeError.prototype.toSource()
Returns code that could eval to the same error. Inherited from Error.
WebAssembly.RuntimeError.prototype.toString()
Returns a string representing the specified Error object.. Inherited from Error.

Examples

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

try {
  throw new WebAssembly.RuntimeError('Hello', 'someFile', 10);
} catch (e) {
  console.log(e instanceof RuntimeError); // true
  console.log(e.message);                 // "Hello"
  console.log(e.name);                    // "RuntimeError"
  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 Status Comment
WebAssembly JavaScript Interface
The definition of 'WebAssembly constructors' in that specification.
Working Draft Initial WebAssembly draft definition.
ECMAScript Latest Draft (ECMA-262)
The definition of 'NativeError' in that specification.
Draft Definition of standard NativeError types.

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 57 16 52
52
Disabled in the Firefox 52 Extended Support Release (ESR).
No 44 11
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 57 57 Yes
Disabled
Yes
Disabled
Disabled This feature is behind the Experimental JavaScript Features preference.
52
52
Disabled in the Firefox 52 Extended Support Release (ESR).
? 11 7.0
Server
Node.js
Basic support 8.0.0

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/RuntimeError