Discovering the Authentic Page upon Completion of Load using PhantomJS

I am facing an issue while automatically downloading a theme on Wordpress using PhantomJS. The problem arises because the page is not fully evaluated even after it appears to be done loading.

When trying to interact with elements on the page, such as clicking a button, they are not visible due to delayed database queries. This leads to essential components missing from the loaded page, as shown in the image below:

https://i.sstatic.net/QUQTR.png

The theme card fails to appear as expected, and instead, only a spinning loader is displayed. This spinner causes issues with any theme-related scripts.

Do you have any suggestions on how to resolve this issue? I have tried using setTimeout() without success so far. Any help would be appreciated!

ADDITIONAL INFORMATION All functions in my script run after a predefined interval set using the setInterval method. While this works well for executing tasks sequentially, I am now looking for a way to dynamically adjust the interval time as functions are executed. See a snippet of the code below:

    var steps = [
  function() {
    console.log('Going')
    page.open('http://google.com')
    //Requires minimal time
  },
  function() {
  console.log('Searching')
  page.evaluate(function() {
    //Complex tasks that need more time
  })
}]
//Setting the interval:

    setInterval(executeRequestsStepByStep, 250)
function executeRequestsStepByStep(){
  if (loading == false && steps[stepindex]) {
    steps[stepindex]()
    stepindex++
  }
  if (!steps[stepindex]) {
    phantom.exit()
  }
}
page.onLoadStarted = function() { loading = true }
page.onLoadFinished = function() { loading = false }

If you have any insights on how to achieve dynamic interval adjustment during script execution, please share your thoughts!

Answer №1

One way to ensure that the entire page has loaded is by monitoring the page.onLoadFinished callback and considering the page loaded if this callback is not called again within N seconds.

Another method involves comparing the number of page.onResourceReceived and onResourceRequested calls (potentially accounting for onResourceError as well), but this approach can be cumbersome and unreliable.

Since ajax requests occur after the initial page load, neither of the aforementioned options are effective in handling them.

If your spinner appears during an ajax request, a good strategy might involve waiting for the spinner to disappear. Additionally, implementing a separate safety timeout of 30 seconds could prevent your script from hanging indefinitely, allowing you to exit with phantom.exit(1) if necessary.

Answer №2

In accordance with the words of Vaviloff, one can choose to implement various approaches. However, I have personally discovered a solution that proves effective in situations similar to the one described above – utilizing the waitFor function as demonstrated in this example script.

This particular script is designed to cease execution if it surpasses the 30-second mark, proceeding only when the loader element vanishes:

waitFor(function() {
    return page.evaluate(function() {
        if (loader disappears) {
            return true;
        } else {
            return false;
        }
    });
}, function() {
    // Carry out subsequent steps here
}, 30000);

I trust that this solution will prove beneficial to your situation.

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

Cannon.JS ensures that walls are impenetrable

I am currently experimenting with three.js and cannon.js, but I have encountered an issue where I am unable to create solid walls or any stationary objects that can block the player's movement. Below is the code I have been working on so far. I would ...

Is it possible to utilize viewport height as a trigger for classes in Gatsby?

Unique Case Working on a Gatsby site with Tailwind CSS has brought to light an interesting challenge regarding different types of content. While the blog pages fill the entire viewport and offer scrolling options for overflowing content, other pages with ...

Observables in Knockout.js vanish after being bound

I'm encountering a peculiar issue with my Knockout script. Here is the viewModel: viewModel = { viewShown: function () { if (params.id !== undefined) timer = setInterval(loadVorgangsdetails, 100); else { $( ...

How to assign a specific class to a list item in AngularJS based on its attribute value

Having some difficulties with this code: .directive('mydirective', function() { return { template: '<ul>\ <li priority="500"><a href="#"><i></i>Inbox</a></li>\ ...

Is there a way for me to view the output of my TypeScript code in an HTML document?

This is my HTML *all the code has been modified <div class="testCenter"> <h1>{{changed()}}</h1> </div> This is my .ts code I am unsure about the functionality of the changed() function import { Component, OnInit } f ...

Modify visibility or enable state of a text box according to a checkbox in PHP

Currently, I am utilizing PHP to exhibit a vertical list of numbered checkboxes, with one checkbox for each day in a specific month. Next to every checkbox, there is a text box where users can input optional notes for the selected day. To ensure that users ...

Exploring the world of JMeter: capturing sessions with JavaScript and jQuery

I need to capture a user session in order to conduct a performance test. I have been using the JMeter HTTP(S) Test Script Recorder, but unfortunately it is not recognizing javascript and jquery. The error message I'm receiving is: JQuery is not def ...

How to selectively filter an array of objects using another array in JavaScript

Imagine you have an array filled with objects: people = [ {id: "1", name: "abc", gender: "m", age:"15" }, {id: "2", name: "a", gender: "m", age:"25" }, {id: "3 ...

Show the Canvas element at the back of the DIV

This particular question requires a clear explanation. My goal is to have the canvas act as a background element on the page, while the main content of the page starts in its usual position. I attempted using separate DIVs with their own Z-index values, bu ...

Node.js project that was once functional is now encountering issues with the error message: "Error: Route.post() requires a callback function but received [object Undefined]."

When it comes to asking questions, I typically provide a lot more detail and use specific wording in my titles. However, I'm currently facing an issue that has left me stumped on where to find the solution. Recently, I delved into learning Node JS an ...

React - triggering a router link action before the link is assigned a value

In this scenario, the issue arises because the URL changes before the link receives a value. The state is being received directly through the component but by the time it happens, the component has already been clicked. This results in the value being as ...

Using Three.js to showcase 3 different slices of heatmaps within a 3D environment

I'm working on using Three.js to create a 3D representation of a matrix. Each 2D plane in the matrix should be displayed as a 2D heatmap. Here is an example of what I'm aiming for: https://i.sstatic.net/Kj5yb.png My current obstacle is figuring ...

What is the best way to retrieve duplicate input values using JavaScript?

Hey there! I have created a button that, when clicked, will add two input fields one after the other. I achieved this using the clone() function. However, my issue arises when I input values into each field and then click the submit button, as I only recei ...

Does Koa.js have a nested router similar to Express?

Are there any libraries available that offer Express-style nested routers? For example: var koa = require('koa'); var app = koa(); var Router = require('???'); var restApiRouter = Router(); restApiRouter.get('/', function*() ...

HTML experiences confusion as JSON tosses undefined data

Can someone assist me with API integration? I am new to this and trying to display the Poster, Title, and Year from an API URL. Here is the code I have been working on. When I log in, it shows JSON in an array but throws "undefined" in front-end. Your help ...

In what way did the virus find its way to WordPress (uniq/load.php -> crypted120med.exe)?

Whenever I try to access http://MY_IP:8080/uniq/load.php or http://MY_DOMAIN:8080/uniq/load.php https://i.stack.imgur.com/O3ZVq.png However, if I visit http://MY_DOMAIN/uniq/load.php I get a 404 error. The /uniq/ folder on the server does not conta ...

Tips for enabling mouse functionality while utilizing PointerLockControls

I'm currently working on a 3D art gallery using Three.js and PointerLockControls for navigation. My goal is to have the artwork on the gallery walls clickable, triggering a pop-up window with additional information. However, it seems that PointerLock ...

Is there a way to share another person's contact card using whatsapp-web.js?

Is it possible to send a contact card of someone else using whatsapp-web.js, even if the person is not saved in my phone's contact list? I want to send a contact card to someone who is on my phone's contacts, but the contact information I want to ...

Display all saved bookmarks by utilizing JavaScript

How can I utilize Javascript to display a complete list of my bookmarks? Any advice on achieving this would be greatly appreciated. Thank you in advance. ...

Retrieving data from various endpoints using React JS

Here is the code snippet to fetch contents from my Django server: However, I also need to fetch from another URL: I am unsure how to achieve this. Any assistance would be greatly appreciated. useEffect(() => { fetch("http://127.0.0.1:8000/api/con ...