function checkValidity()
{
startChecked = false;
finishChecked = false;
alert("startChecked: " + startChecked);
alert("finishChecked: " + finishChecked);
if (document.dd.start.checked.length == undefined || document.dd.finish.checked.length == undefined )
{
alert("It is undefined");
}
alert("finish");
}
Why does the alert("finish") not get executed when the if statement is false, but works fine when it is true?
It seems like there may be a null pointer exception occurring and there are no errors being displayed on your browser.
To troubleshoot, you can try the following code snippets:
alert(document);
alert(document.dd);
alert(document.dd.begin);
alert(document.dd.begin.checked);
alert(document.dd.end);
alert(document.dd.end.checked);
If you receive 'undefined' from any of these alerts, it indicates that there may be issues in your code execution.
Additionally, make sure to read through the other answers provided here for more insights.
Another approach is to wrap your code in a try/catch block and display the error using alerts:
function valid(){
try{
begin_checked = false;
end_checked = false;
alert("begin_checked: " +begin_checked);
alert("end_checked: " +end_checked);
if (document.dd.begin.checked.length == undefined || document.dd.end.checked.length == undefined ){
alert("In undefined");
}
alert("end");
} catch (e) {
alert(e);
}
}
Have you noticed any errors showing up in your browser's error console? It could be possible that the script is attempting to access a property that does not actually exist, resulting in a failure before reaching the "== undefined" part. You might want to confirm that the property exists or use the typeof function to verify if it is undefined.
if (!document.dd.begin.checked.length || !document.dd.end.checked.length)
{
alert("Results are undefined");
}
if (typeof document.dd.begin.checked.length == 'undefined' || typeof document.dd.end.checked.length == 'undefined' )
{
alert("Results are undefined");
}
Visit Firebug's official website here: http://getfirebug.com/
Hey there, here is some HTML code that I need help with: <tbody> <tr> <td class="text-center"><input type="text" class="form-control cardSerialNumber"></td> <td class="text-center"><button type="button" onc ...
I am using JavaScript to dynamically populate anchor links in a repeater and displaying them in a colorbox iframe. This functionality is working well in IE7, Safari, and Chrome, but encountering an issue in Firefox (version 14.1). In Firefox, the links ar ...
I've encountered a puzzling issue with a tiny fiddle I created: https://jsfiddle.net/wn7aLf3o/4/ The scenario is that clicking on 'append' should add an "X" to the textarea. It functions perfectly until I manually input some text in the te ...
There seems to be an issue with animating the height property of an element as it is not animating at all. Check out the fiddle where the animation is attempted. Here is the HTML: <ul> <li> li 1 </li> <li> ...
We are currently developing a dynamic form system where users can create custom questions in the admin panel and set conditions to display them based on the values of other questions. ng-show="((UserCode==10003 && Name=='Ankur') ||(State ...
Currently, I am in the process of setting up tagging and utilizing ajax to display the most commonly used tags. To accomplish this, I decided to employ the Select2 plugin. However, I encountered a roadblock when attempting to retrieve my JSON Data in my ja ...
A small .js file containing 3 functions for easy in-site cookie management was created. Below is the source code: // Create Cookie function Bake(name,value) { var oDate = new Date(); oDate.setYear(oDate.getFullYear()+1); var oCookie = encodeURIComponent(n ...
I have developed an NPM package available at - (https://github.com/fyndreact/nitrozen) The package was successfully published on the Github registry (), but I am looking to publish it on the NPM registry. However, I cannot locate the package in the NPM r ...
When setting up my nodejs server, I chose to use ES6 module syntax: package.json "type": "module" So far, running my server locally as a nodejs process has been successful. For example: "scripts": { "dev": "npm outdated ; nodemon --experimental-modul ...
I'm working on a components library that will soon be published to npm for use in a razzle app. My main query revolves around the best practices for building these packages - should they be built with CommonJS (cjs) or ECMAScript Modules (esm)? And wh ...
Below is my current AJAX code setup: optionScope.data().stage = 'b'; $.ajax({ url: "functions/contact.php", type: "post", data: {'stage': optionScope.data().stage}, success: function(data, status) { ...
map.css({ 'zoom': zoom, 'left': map.width()/(2*zoom) - (point[0]/100)*map.width(), 'top': map.height()/(2*zoom) - (point[1]/100)*map.height() Upon observation, it appears that Chrome adjusts the map zoom first be ...
I am currently working on implementing an edit functionality. When the user initially selects a list of radio buttons during the create process, I store them in a table as a CSV string. Now, during the edit functionality, I retrieve this list as a CSV stri ...
Here is my current result: [ '1', '1', '0', '0' ], [ '2', '4', '0', '0' ], [ '3', '7', '0', '0' ], [ '4', '0&apo ...
I'm new to this and feeling lost on how to tackle this issue. I tried following the instructions on https://github.com/i18next/next-i18next, but I'm struggling with index.js. When I toggle /de on my landing page, it translates correctly in the UR ...
There are times when I overlook using the await keyword, for example: const foo = bar(); // as opposed to const foo = await bar(); Identifying these bugs can be challenging. Are there any methods, libraries, or tools that can help prevent such errors? ...
I'm looking for assistance in creating a globe using three.js where I can project arcs representing exports and imports between countries. I have a basic globe set up, but I need guidance on the following: 1. How to use country shape files instead of ...
I've searched multiple pages, but haven't found a solution that works for me. I'm trying to make the text in my div gradually become more transparent as I scroll. Can anyone help with this? Here's my code: <script src = "/js/titleSc ...
I am attempting to create a jQuery thumbnail scroller with buttons that respond to mousedown and mouseup events. I have successfully implemented the scrolling functionality, but I am facing issues when trying to refactor it into a reusable function. Below ...
Hello everyone, please take a look at my code below. I am attempting to pass PHP array values to a JavaScript function. When I run the script, I receive alerts for parameter0=1, parameter1=2, and parameter2=3 separately. What I am trying to achieve is to ...