javascript - what should i use try and catch block or onerror event -


i new javascript.sometimes error comes in program after reviewing many times mistake still unsolved.tough mistakes small in sight .so away shall use event onerror or try catch block .which practice doing .

or there way find out mistake or error in program in less time..

please let me know..

it not 1 better other. situation, feel onerror easy , appropriate, lets alert error message reported javascript without needing rewrite code within try/catch blocks.

demo code onerror handler in self-contained script added above rest of page's code, along example syntax error triggers prompt showing javascript error message.

<script> onerror = function(m) {     return confirm(         'scripts on page generated error message: ' +          m +         '\n\ndo wish continue running scripts?'); } </script>  <script> alert(' hello'; </script>

the above bad code generates alert message 'unexpected token ;' because of missing parenthesis.


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