WebAssembly.RuntimeError

The WebAssembly.RuntimeError object is the error type that is thrown whenever WebAssembly specifies a trap.

Constructor

WebAssembly.RuntimeError(): Creates a new WebAssembly.RuntimeError object.

Instance properties

WebAssembly.RuntimeError.prototype.message: Error message. Inherited from Error.
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.

Instance methods

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

Creating a new RuntimeError instance

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 WebAssembly.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
WebAssembly JavaScript Interface # exceptiondef-runtimeerror
ECMAScript Language Specification (ECMAScript) # sec-native-error-types-used-in-this-standard

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`RuntimeError`	57	16	52 Disabled in the Firefox 52 Extended Support Release (ESR).	No	44	11	57	57	52 Disabled in the Firefox 52 Extended Support Release (ESR).	43	11	7.0
`RuntimeError`	57	16	52 Disabled in the Firefox 52 Extended Support Release (ESR).	No	44	11	57	57	52 Disabled in the Firefox 52 Extended Support Release (ESR).	43	11	7.0