WebAssembly.LinkError() constructor
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since October 2017.
The WebAssembly.LinkError() constructor creates a new
WebAssembly LinkError object, which indicates an error during module
instantiation (besides traps
from the start function).
Syntax
new WebAssembly.LinkError()
new WebAssembly.LinkError(message)
new WebAssembly.LinkError(message, options)
new WebAssembly.LinkError(message, fileName)
new WebAssembly.LinkError(message, fileName, lineNumber)
Parameters
messageOptional-
Human-readable description of the error.
optionsOptional-
An object that has the following properties:
causeOptional-
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.
fileNameOptional Non-standard-
The name of the file containing the code that caused the exception.
lineNumberOptional Non-standard-
The line number of the code that caused the exception.
Examples
Creating a new LinkError instance
The following snippet creates a new LinkError instance, and logs its
details to the console:
try {
throw new WebAssembly.LinkError("Hello", "someFile", 10);
} catch (e) {
console.log(e instanceof LinkError); // true
console.log(e.message); // "Hello"
console.log(e.name); // "LinkError"
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-linkerror |
| ECMAScript® 2026 Language Specification # sec-nativeerror-constructors |
Browser compatibility
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