on error javascript code example

Example 1: js errors

JS Error Name Values:
name
Sets or returns the error name
message
Sets or returns an error message in string from
EvalError
An error has occurred in the eval() function
RangeError
A number is “out of range”
ReferenceError
An illegal reference has occurred
SyntaxError
A syntax error has occurred
TypeError
A type error has occurred
URIError
An encodeURI() error has occurred

Example 2: JavaScript Errors

<p id="demo"></p>

<script>
try {
  adddlert("Welcome guest!");
}
catch(err) {
  document.getElementById("demo").innerHTML = err.message;
}
</script>

Example 3: how to handle error js

// just sample try catch javascript
try {
  // doing some methods
}catch (e) {
  // showing message or other proses you want
  console.log(e.message)
}

Example 4: on error html

<img src="logo1.jpg" onerror="this.src='error.jpg';" class="posting-logo-img">