How to use Try Catch Throw in JavaScript

How Javascript exception handling works. Try Catch Throw

Throw, and Try...Catch...Finally

The try statement defines a code block to run (to try).

The catch statement defines a code block to handle any error.

The finally statement defines a code block to run regardless of the result.

The throw statement defines a custom error.

Example Javascript exceptionExample Javascript exception

In this example we misspelled "alert" as "allert" to deliberately produce an error:

try {
    allert("Welcome to this test!");
}
catch(err) {
    document.getElementById("pDemo").innerHTML = err.message;
}

Implementing the Rollbar Javascript SDK helps speed up the error resolution flow. Here is the code example:

try {
    allert("Welcome to this test!");
}
catch(err) {
    Rollbar.error(err);
    document.getElementById("pDemo").innerHTML = err.message;
}

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