WebAssembly.RuntimeError

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This feature is well established and works across many devices and browser versions. Its been available across browsers since October 2017.

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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.cause: Error cause. 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.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
}