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. 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.

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 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

Browser compatibility

See also

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