Prevent Function Execution in Javascript and JQuery

Question

I have such a code block and when code finds an error attribute which is set to error, then it should prevent further execution, how can I prevent it from execution :

$(document).ready(function() {
    $("#SendMessage").click(function(e) {
        var elements = $("#contact-area input:text[error=error]").get();
        for (var i = 0; i < elements.length; i++) {
            if ($(elements[0]).attr("error") == "error") {
                alert("error found");
                // Stop execution of whole function
            }
        }
        $("#loaderImage").show();
        $("#statusMessage").text("Sending, Please wait...");
        window.setTimeout(function() { PageMethods.SendMessage(new Message().fullContent(), onSuccess(), onFailed()) }, "4000");
    });
})

And How can I do that with both JQuery and Javascript, maybe there is a pre-defined function to do that easily in JQuery.

Chris Thompson · Accepted Answer · 2009-10-09 00:30:06Z

2

$(document).ready(function() {
    var flag = false;
    $("#SendMessage").click(function(e) {
        var elements = $("#contact-area input:text[error=error]").get();
        for (var i = 0; i < elements.length; i++) {
            if ($(elements[0]).attr("error") == "error") {
                alert("error found");
                // Stop execution of whole function
                flag = true;
                break;
            }
        }
        if (!flag){
          $("#loaderImage").show();
          $("#statusMessage").text("Sending, Please wait...");
        window.setTimeout(function() { PageMethods.SendMessage(new Message().fullContent(), onSuccess(), onFailed()) }, "4000");
        }
    });
})

Would that accomplish what you need?

answered Oct 9, 2009 at 0:30

Chris Thompson

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1 Comment

Tarik Over a year ago

Well, actually I was expecting something like "what return does in C#", isn't there any function or keyword to prevent execution ? maybe stopExecution(); ?

Jonathan Fingland · Accepted Answer · 2009-10-09 00:31:55Z

1

just return; when the error is found

$(document).ready(function() {
    $("#SendMessage").click(function(e) {
        var elements = $("#contact-area input:text[error=error]").get();
        for (var i = 0; i < elements.length; i++) {
            if ($(elements[0]).attr("error") == "error") {
                alert("error found");
                return;
            }
        }
        $("#loaderImage").show();
        $("#statusMessage").text("Sending, Please wait...");
        window.setTimeout(function() { PageMethods.SendMessage(new Message().fullContent(), onSuccess(), onFailed()) }, "4000");
    });
})

answered Oct 9, 2009 at 0:31

Jonathan Fingland

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4 Comments

Jonathan Fingland Over a year ago

the alert popped up, but then continued?

Tarik Over a year ago

@Yeah, I didn't know why ? Maybe some comparability issue with Mozilla ?

Tarik Over a year ago

@crescen.. if I knew wtf is happening, I wouldn't be here asking this question :|

Tarik Over a year ago

Alright people it now works, because there was another file referred to that page that why it wasn't working.

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