JavaScript was loaded and syntax checked with AngularJS

Question

JavaScript was loaded and syntax checked with AngularJS

I've been working on implementing a loading overlay on my website based on the presence of angularjs without any errors.

Currently, I have this concise script that checks for the presence of angularjs:

<script type='text/javascript'>
    window.onload = function () {
        if(typeof angular == 'undefined') {
         document.getElementById("page-loader-overlay").style.display = "block";
        } else {
         document.getElementById("page-loader-overlay").style.display = "none";
        }
    };
</script>

However, I'm also interested in ensuring that there are no syntax errors causing issues with certain browsers that may render the above check ineffective. Is there a way to incorporate a syntax check into this validation?

Thank you in advance.

javascript angularjs syntax load

Answer 1

Answer №1

Yes, you have the ability to identify syntax errors by utilizing a global onerror handler. By checking if the error is a SyntaxError instance using the following code:

<script>
onerror = function(messageOrEvent, source, lineno, colno, error) {
  if (error instanceof SyntaxError) {
    console.log('A syntax error has been captured: ', arguments);
  }
}
</script>
<script>
let f/4; // This will trigger a syntax error
</script>

Answer 2

Yes, you have the ability to identify syntax errors by utilizing a global onerror handler. By checking if the error is a SyntaxError instance using the following code:

<script>
onerror = function(messageOrEvent, source, lineno, colno, error) {
  if (error instanceof SyntaxError) {
    console.log('A syntax error has been captured: ', arguments);
  }
}
</script>
<script>
let f/4; // This will trigger a syntax error
</script>

JavaScript was loaded and syntax checked with AngularJS

Answer №1

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