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.cause

Error cause. Inherited from Error.

WebAssembly.RuntimeError.prototype.fileName Non-standard

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

WebAssembly.RuntimeError.prototype.lineNumber Non-standard

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

WebAssembly.RuntimeError.prototype.columnNumber Non-standard

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

WebAssembly.RuntimeError.prototype.stack Non-standard

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
}

Specifications

Browser compatibility

See also

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