Quick Reference
The Error object provides error information when an error occurs. The name property sets or returns the name of an error.
<!-- html element to place output -->
<p id="my_output"></p>There is a spelling error in the following alert (in the “try”) and we can find out what that error is by using “catch”.
try {
allert('Welcome to 1SMARTchicken!');
}
catch(err) {
document.getElementById('my_output').innerHTML =
err.name + ': (' + err.message + ')';
}Output
ReferenceError: (allert is not defined)Syntax
errorObj.nameError Names
| Error Name | Description |
|---|---|
| RangeError | A number "out of range" has occurred |
| ReferenceError | An illegal reference has occurred |
| SyntaxError | A syntax error has occurred |
| TypeError | A type error has occurred |
| URIError | An error in encodeURI() has occurred |
JavaScript Notes:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
- JavaScript variables are case sensitive (x is not the same as X)
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.