Inspect the JavaScript file for errors and find a solution to overcome them

Our website's select box has been updated to retrieve city options from a JavaScript array file using an ajax call request. This file is now dynamically created on a different server and then transferred to the static server where it is used to populate the select box.

While this method works well most of the time, there are occasional failures when the file becomes corrupted or is not fully transferred. This results in syntax errors within the file contents like:

var cityArray = [{SID : "15",SN : "Rajasthan",cities : [{CID : "677",CN : "Jaipur"}, //syntax error, no eol

As a result, all JavaScript on the website stops working when this file is used.

My query is how can we detect errors in the included file and revert to the old method of populating the select box options?

Thank you in advance for your help.

javascriptarrays

Answer №1

To take a shortcut, here's a sneaky technique:

  • Utilize an XMLHttpRequest to retrieve the file content as a string instead of including a <script> tag.
  • Verify if the string contains an end of line character, and if it doesn't, append one.
  • Execute the string using eval() within a try-catch block.

By following these steps, not only can you work around the issue with your specific 'corrupted' files, but your script will also remain functional even if the file is corrupted in other ways.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

JavaScript does not alter the text box for the default dropdown value

My webpage has three elements: a text box named txtSubTotal, a drop-down menu named discount, and another text box called txtGrossTotal. The txtSubTotal updates when the user clicks on the 'ADD' button, while the txtGrossTotal updates based on th ...

javascripthtml

Incorrect ng-pattern does not enable the tooltip to be activated

I have implemented the ng-pattern="/^[0-9]{9}$/" in an input field that appears as follows: <input type="text" id="company_taxId" ng-model="company.taxId" required="required" class="input ng-scope ng-valid-maxlength ng-valid-mi ...

javascriptangularjstwitter-bootstrap

When the page is scrolled, trigger a click event on the next button in

Currently, I have a listing page that features pagination at the bottom. However, my goal is to transform this into an infinite loading page. The issue I am facing is that when the click event triggers after scrolling to the bottom, it makes calls for pag ...

javascriptjquery

Detecting mistakes using ES6 assurances and BookshelfJS

I'm working on implementing a simple login method for a Bookshelf User model in an ExpressJS application. However, I am facing issues with handling errors from the rejected promises returned by the login function in the User model. While referring to ...

javascriptnode.jsexpresses6-promisebookshelf.js

Issue with Framer Motion Modal: Animation presence fails to function

Currently, I am facing an issue with the exit animation of a modal created using framer motion. While the initial animation on opening the modal works perfectly fine, the exit animation fails to trigger and the modal disappears abruptly without any transit ...

javascriptreactjsanimationframer-motion

Transforming a collection of tuples into a multi-dimensional MxN numpy array

I am working with a list of tuples, and I want to create a numpy nd.array with specific shape. a=[('1A34', 'RBP', 0.0, 1.0, 0.0, 0.0, 0.0, 0.0), ('1A9N', 'RBP', 0.0456267, 0.0539268, 0.331932, 0.0464031, 4.41336e ...

pythonarraysnumpy

Troubleshooting a Problem with AngularJS $.ajax

Oops! Looks like there's an issue with the XMLHttpRequest. The URL is returning a preflight error with HTTP status code 404. I encountered this error message. Any thoughts on how to resolve it? var settings = { "async": true, "crossDomain": ...

javascriptjqueryangularjsajax

Controller receiving empty object array from FormData

I am encountering an issue with my ajax call to the controller, where I am passing FormData() containing an array of objects and other properties. The list array that I pass seems to have 0 elements in the controller. Can anyone assist me with this problem ...

javascriptjqueryajaxasp.net-mvcasp.net-ajax

Unable to locate the JavaScript/jQuery key

Struggling with a dictionary in JavaScript being passed to a function in Django. Despite the key existing, I'm getting an error saying 'key message not found'. As a newbie in Javascript and JQuery, I must have made a simple mistake somewhere ...

javascriptjqueryhtmldjango

differentiating between user click and jquery's .click() method

There are <a href=".. tags on a page with an inline onclick attribute. If a user clicks one without being logged in, they will be prompted to log in. After logging in and the page refreshes, jQuery will trigger .click() on the <a> element to redir ...

javascriptjqueryclick

Could you please explain the distinctions among onLoad, onDomready, No wrap - in <head>, and No wrap - in <body>?

When it comes to editing my code, I rely on JSFiddle. However, I have noticed that in certain instances when running JavaScript or jQuery, the code only works if I choose "No wrap - <head>" or "No wrap - <body>". CLICK HERE FOR THE JSFIDDLE EX ...

javascriptjsfiddle

Extracting and retrieving the value from the paramMap in Angular/JavaScript

How can we extract only the value from the router param map? Currently, the output is: authkey:af408c30-d212-4efe-933d-54606709fa32 I am interested in obtaining just the random "af408c30-d212-4efe-933d-54606709fa32" without the key "authke ...

javascriptangulartypescript

What is the best way to display a webpage within an iOS app using PhoneGap?

In my iOS phonegap app, I am looking to have a single view that displays a web page. Can someone guide me on how to load this specific view with a particular URL using JavaScript? Although I primarily develop native iOS applications and do not have expert ...

javascripthtmliosurlcordova

Tips for implementing an automatic refresh functionality in Angular

I am dealing with 3 files: model.ts, modal.html, and modal.ts. I want the auto refresh feature to only happen when the modal is open and stop when it is closed. The modal displays continuous information. modal.htlm : <button class="btn btn-success ...

javascriptangularbootstrap-4angular8

Avoiding the need to wait for completion of the jQuery $.get function

Currently, I am executing a basic jQuery GET request as shown below and it is functioning correctly. $.get("http://test.example.com/do-something", function (data) { console.log("test work done"); }); The GET request is initiated without affecting the ...

javascriptjqueryajax

Forward user to a subdomain once they have successfully logged in on an Angular 2 application

I've been working on an Angular 2 application and I'm looking to redirect users from www.example.com to admin.example.com after they successfully log in. What is the best way to accomplish this using Angular 2? Additionally, how can I test this f ...

javascriptangularsubdomainangular2-routinghttp-redirect

Utilizing D3.js: Applying Multiple Classes with Functions

My current project involves using D3.js and I've encountered a particular challenge that has me stumped. In the CSV file I'm working with, there are columns labeled "Set" and "Year". My goal is to extract values from these columns and use them a ...

javascripthtmlcsssvgd3.js

Is there a way to retrieve an array within a hash?

Within an array, I have a hash: values = {} values.merge!(name => { "requested_amount" => @specific_last_pending_quota.requested_amount, "granted" => @specific_last_pending_quota.granted, "pending_final" => pending_final }) @o_requests[r ...

ruby-on-railsarraysrubyhash

Retrieving information from MongoDB for a specific ObjectID associated with the current authenticated user

Having two collections in my MongoDB structured as follows: Data User: id: ObjectId ("5fb39e3d11eaad3e30cfb1b0") userName: "Tobias" password: "yyy" id: ObjectId ("5fb3c83fb774ff3340482250") userName: "Thor&qu ...

javascriptmongodbexpressmongooseejs

Run the command "node index.js" to simultaneously start and stop the server

After installing WSL2 and the Ubuntu 22.04 distribution on Windows 11, I set up my environment, installed nvm, Node version 16.17.1, and then ran npm init in my folder. Following that, I installed Express and created an index.js file with a simple structur ...

javascriptnode.jsexpressubuntuwsl-2