JS in try: Catch.. Usage of

try to test the code block for errors.

The catch statement handles the error.

throw creates and runs out of error.

Try   {   //Run code here     throws an error   } catch (Err)   {   //Handle error here   }

Here is an example:

<P>Please output a number from 5 to 10:</P><inputID= "Demo"type= "text"><Buttontype= "button"onclick= "myFunction ()">Test input</Button><PID= "Mess"></P></Body></HTML><Scripttype= "Text/javascript">    functionmyFunction () {Try{         varx=document.getElementById ("Demo"). Value; Take the value of the elementif(x=="")    Throw "value is empty"; Throws an error based on the obtained valueif(IsNaN (x))Throw "not a number ."; if(x>Ten)     Throw "too Big"; if(x<5)      Throw "too small"; }    Catch(err) {vary=document.getElementById ("mess"); Catch the error above throw throw, give P label display y.innerhtml="Error:" +Err+ ". "; }}</Script>

JS in try: Catch.. Usage of