Thread

shahaparan

Apr 2, 2019

function problems ?

if any one function is error inside try catch , I will not get value is here ? if my all func is okh , then it will show success . how can i do this ?

try {
function 1
function 2 
function 3 
}catch()

#reactjs #nodejs #javascript #js

Responses(1)

Not clear about your intent. Complain about the following, and that may give me better understanding. Note test() will ALWAYS report "calling function1" - there is no function1.

    <html>
    <head>
        <script type="text/javascript"">
            function test() {
                var msg;
                try {
                    msg = "calling function1";
                    function1();
                    msg = "function1 passed - calling function2";
                    function2(); 
                    msg = "function2 passed - calling function3";
                    function3() 
                    msg = "all functions passed";
                }
                catch (e) {
                    ;// do something useful here
                }
                return msg;
            };

            function functiona() {;};
            function functionb() {;};
            function functionc() {;};

            function test2() {
                try {
                    functiona();
                    functionb(); 
                    functionc();
                    alert("all functions passed");
                }
                catch (e) {
                    ;// do something useful here
                }
            };

          window.onload = function() {
              alert(test());
              test2();
          };
        </script>
    </head>
    <body>
        <div>some content here</div>
    </body>
    </html>

You could create a function which wraps a function within try catch.

Well, here's an example:

    // your own 3 functions 
function good1() { console.log("works"); }
function bad() { throw "i throw somethuing"; }
function good2(someParameter)  { 
    console.log("works with paraemter too.. =>", someParameter); 
}

// takes in a function as parameter and executes
// within a try catch block. 
// returns either result or the error.
function runSafe(fn) {
    try {
        return fn();
    } catch(error) {
        console.error(error);
        return null;
    }
}

// execute functions and get all results..
var results = [
    runSafe(good1),
    runSafe(bad),
    runSafe(function() { return good2("Yes it does!"); }
];

// log results. 
// if an element is null, it means it's an error..^^
console.log(results);

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function problems ?

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