JS Errors
Error object
The Error object provides information about the error when the error occurs.
Example
In the following example, the try block contains the undefined function "addddlert", and executing it will generate an error, and the catch block will output the error message:
try {
adddlert("Welcome");
}
catch(err) {
document.getElementById("demo").innerHTML =
err.name + "<br>" + err.message;
}For more JavaScript errors, please refer to: JavaScript Errors - throw, try and catch
Error object properties
| Property | Description |
|---|---|
| name | Set or return an error name |
| message | set or return an error message (string) |
Non-standard Error object properties
Mozilla and Microsoft define the following non-standard Error object properties:
fileName (Mozilla)
lineNumber (Mozilla)
columnNumber (Mozilla)
stack (Mozilla)
description (Microsoft)
number (Microsoft)
The above properties are not recommended because not all browsers support it.