JavaScript Errors JAVASCRIPT
- JavaScript Introduction
- JavaScript Syntax
- JavaScript innerHTML
- JavaScript document.write()
- Javascript - window.alert()
- JavaScript - console.log()
- JavaScript Comments
- JavaScript Variables
- JavaScript Operators
- JavaScript Data Types
- JavaScript Functions
- JavaScript Objects
- JavaScript Events
- JavaScript Strings
- JavaScript String Methods
- JavaScript Numbers
- JavaScript Number Methods
- JavaScript Arrays
- JavaScript Array Methods
- JavaScript Sorting Arrays
- JavaScript Array Iteration
- JavaScript Date Objects
- JavaScript Date Formats
- JavaScript Get Date Methods
- JavaScript Set Date Methods
- JavaScript Math Object
- JavaScript Conditions
- JavaScript Switch
- JavaScript Loop For
- JavaScript While Loop
- JavaScript Break and Continue
- JavaScript Type Conversion
- JavaScript Errors
- JavaScript Scope
- JavaScript this Keyword
- JavaScript Classes
- JavaScript Debugging
- JavaScript - Changing CSS
- JavaScript JSON
JavaScript Errors
JavaScript Errors - Throw and Try to Catch
The try statement lets you test a block of code for errors.
The catch statement lets you handle the error.
The throw statement lets you create custom errors.
The finally statement lets you execute code, after try and catch, regardless of the result.
Errors Will Happen!
When executing JavaScript code, different errors can occur.
Errors can be coding errors made by the programmer, errors due to wrong input, and other unforeseeable things.
Example
<p id="demo"></p>
<script>
try {
adddlert("Welcome guest!");
}
catch(err) {
document.getElementById("demo").innerHTML = err.message;
}
</script>
avaScript try and catch
The try statement allows you to define a block of code to be tested for errors while it is being executed.
The catch statement allows you to define a block of code to be executed if an error occurs in the try block.
The JavaScript statements try and catch come in pairs:
Block of code to try
}
catch(err) {
Block of code to handle errors
}
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