WebAssembly.CompileError() constructor

The WebAssembly.CompileError() constructor creates a new WebAssembly CompileError object, which indicates an error during WebAssembly decoding or validation.


new WebAssembly.CompileError()
new WebAssembly.CompileError(message)
new WebAssembly.CompileError(message, options)
new WebAssembly.CompileError(message, fileName)
new WebAssembly.CompileError(message, fileName, lineNumber)


message Optional

Human-readable description of the error.

options Optional

An object that has the following properties:

cause Optional

A property indicating the specific cause of the error. When catching and re-throwing an error with a more-specific or useful error message, this property can be used to pass the original error.

fileName Optional Non-standard

The name of the file containing the code that caused the exception.

lineNumber Optional Non-standard

The line number of the code that caused the exception.


Creating a new CompileError instance

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

try {
  throw new WebAssembly.CompileError("Hello", "someFile", 10);
} catch (e) {
  console.log(e instanceof CompileError); // true
  console.log(e.message); // "Hello"
  console.log(e.name); // "CompileError"
  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


WebAssembly JavaScript Interface
# exceptiondef-compileerror
ECMAScript Language Specification
# sec-nativeerror-constructors

Browser compatibility

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See also