Try-Catch Block In Function

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1.00/5 (2 votes)

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SQL

    function checkimgexist(){
try{
        document.getElementById('sample').src = 'res/defult/arrow.svg';
        }
   }
   catch(ex){
        cosole.log('error here is '+ex);
   }

This code works if image exists and if not, it shows error in console.
I'm not sure whether it is this exception because it don't looks like exception of the catch block!

Posted 11-Feb-15 18:32pm

venkat teja

Updated 11-Feb-15 19:56pm

v5

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Leo Chapiro · Answer 1 · 2015-02-11T18:48:00

No, this is not correct! You need a catch block IN your function like this:

JavaScript

function checkimgexist()
    {
        try
        {
           document.getElementById('sample').src = 'res/defult/arrow.svg';
        }
        catch(ex)
        {
          cosole.log('error here is '+ex);
        }
    }

Solai Raja · Answer 2 · 2015-02-12T00:59:00

Make Sure the image tag is available with your name(Sample).

HTML

<img id="sample" src="" />

then try to access as your code

JavaScript

document.getElementById("sample").src

The Javascript Try block can only find error with in the HTML document, not about the Physical Path of your file(res/defult/arrow.svg).

For exp, above code works as if the image tag is available then sets source of the image tag with "res/defult/arrow.svg"
other wise it throws the error to Catch Block.

Abhinav S · Answer 3 · 2015-02-11T19:58:00

Solution 2

Code formatting is not correct. Just check the closing braces.

Posted 11-Feb-15 19:58pm

Abhinav S

Comments

venkat teja 12-Feb-15 2:25am

This is the currrent format the problem is catch block not able to catch file not exception(when the image doesnt exist)

function checkimgexist(){
try
{
if(document.getElementById('sample')){
document.getElementById('sample').src = 'res/defult/arrow.svg';
}
}
catch(ex)
{
cosole.log('error here is '+ex);
}
}

/\jmot 12-Feb-15 7:26am

-1Why you are just posting comments to the answer??

Try-Catch Block In Function

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