troubleshooting Question

Question about JavaScript errMsg{} object

Avatar of stevefNYC
stevefNYC asked on
Web Languages and StandardsJavaScript
8 Comments1 Solution492 ViewsLast Modified:
Hi all,

Have a question about an authors intention here when returning an object's value back to the calling function:

var errMsg = {
    // Checks for when a specified field is required
    required: {
        msg: "This field is required.",
        test: function(obj,load) {
            // Make sure that something was not entered and that this
            // isn't on page load (showing 'field required' messages
            // would be annoying on page load)
            return obj.value || load || obj.value == obj.defaultValue;
    // Makes sure that the field s a valid email address
    email: {
        msg: "Not a valid email address.",
        test: function(obj) {
            // Make sure that something was entered and that it looks like
            // an email address
            return !obj.value ||
                /^[a-z0-9_+.-]+\@([a-z0-9-]+\.)+[a-z0-9]{2,4}$/i.test( obj.value );

That's just part of the code, but as you can see, he's consistently using !obj.value... why would you want to return it in this fashion?

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