I have a website which have loading time of 10 sec, and which we want to reduce to 3 second or so. I have two questions on it:
1. When I do an analysis of bundle loading in the network tab of dev tools, I can see some JS/CSS files which have very less usage in home page load. But since bundle.js contains everything, I can't see what JS part of it (which is unused), is present in which source code file. Is there a tool or way to do so, so that I can reverse map (not covered JS and css), to an actual source code file and modify it?
2. While the bundle is downloading, is there a way to show a spinner or progress bar to the user to wait for some more time, which is obviously better than showing blank page?
Tried lighthouse and analysis of loading using network tools
React supports code splitting : https://reactjs.org/docs/code-splitting.html
If you implement code splitting in your app, then you can use a fallback component.
Related
could anyone please help with my webbsite loading times?
Whilst desktop pagespeed ranks 99 the mobile version ranks 75 only.
https://pagespeed.web.dev/report?url=https%3A%2F%2Fwww.muscle-cars.eu%2F&form_factor=mobile
What could I do? I already use next/image and wepb, do I have to compress it more?
Yesterday I tried to remove Catamaran font from the website and it speeds up to 96, but it is very unlikely that removing 80kb font would help that much, I think there is something blocking up loading the font. I tried Google API and self hosted both similar result.
Thanks for help.
Here is the result of your website test, we can see that the mobile version only ranks 75.
I used chrome devtools to check this web page and found some issues to enhance your web user experience.
Your website gets the raw css and javascript files from the server. It's too big and will waste more time. You can reduce file size by using ugly javascript and css files when the page is first loaded.
Your website is getting too many javascript files on first load. I found more than 10 files to load. In mobile 3G networks, more time is wasted. So use webpack or other bundling tool to combine these files into fewer files.
You can reduce file size by using tree shaking javascript and css.
Your web page home page can use server-render teck, which renders javascript in server and sends whole html file to mobile browser.
so I have this website made with Next and on a page there are some graphs (the graphs content changes as it fetches an API) and info.
I want to add a button to the page and when pressed it download the page as a HTML file and includes all the JS and CSS in the HTML file instead of separately, does anyone have any idea as to how to approach this problem. (The graphs content should be the same content as it was on the time of downloading)
(The reason why I want to do this is because I want to distribute these files to others and I want to allow them to read it w/o an internet connection)
You can't really download a React 'page' because there are no pages in React to download.
Next further complicates this because it server-side renders everything and rehydrates client-side. If you inspect one of your pages, you'll see the JSON blocks Next uses for data. Look for the __NEXT_DATA__ script (usually in the footer of your page).
I think the two strategies you could use:
Screen-capture of the graphs during your build sequence and push them over to an AWS S3 bucket or similar (cumbersome)
When I ran into a requirement like this, I just made the data for the graph available as a JSON download just below the graph and it satisfied the use case sufficiently.
If you just want to download the assets and take a look, a workaround is probably leveraging the next/export package. This allows you to run yarn build and generate a static export of your entire site. This should include the file you're looking for.
Just some ideas to think through.
I am currently working on a website and during the loading of the entire page, the page is "jumping" so that I would like to know how I can create an entire ,let's say black screen, where something is displayed during the time the page loads.
That seems quite easy but I was wondering because I have separate files for the header, the footer and the content on how to coordinate all of them, and still have a nice code.
I am working with angularJS. I read a lot about : $viewContentLoaded and also tried ng-cloak, but if any of you has an awesome solution to keep simple, it would be great :)
Thanks
I would say that one approach you can take is use some sort of templating engine for your HTML files (like Jade for example). In this way, you can keep all the code nicely separated in multiple files and using a task runner like Gulp or Grunt you can compile your HTML files before serving the page.
The important difference here is the fact that you won't have to load all the page parts (header, footer and so on) using AJAX requests. Instead, they will already be rendered in your HTML page allowing you to create a nice loader using ng-cloak on your content part.
I could not think of a better title, Please suggest one.
I am planning to work on a large web application. It will take time to load the full application before application starts functioning.
Suppose its something like asana.com. If you have a link to the task and you open the link. It loads the application first and then shows the detail of the task.
Note: I have added another example in update 2
I want to do just the opposite. Suppose if I try to open the link directly. It should show me the tasks details first and then load the whole application in background.
What development strategy should I follow to implement such feature. Will angular be good for this? I have worked with angular for small projects and am capable of think in angular :)
I just wanted to be pointed in right direction.
Update 1:
I am using Apache2 PHP5 in backing as ReST API. I am thinking to change to GoLang http server. But that does not matter in this context :)
Update 2:
I have not yet started working on the application, but I know that its size is going to be big and its going to take time to load the application. This will be a javascript application, all the communication to web will be done mostly by API. APIs will be fast and it wont be slowing down the application. My main concern is the javascript library and the approach to the issue that I want to display the content of the page before the application is loaded and load the application in background.
As second example: https://chrome.google.com/webstore/detail/a-journey-through-middle/gjgkjeheegjnnmheaflhdocglkiegoni?utm_source=chrome-ntp-icon
If you open this link in chrome, it will load the application and then load the specific content in a popup. I want to load the content of the popup first and then load the application in background. How should I write my application to achieve that.
My suggestion (and I say this as I start to do similar vs. having proven it successful) would be to make some level of framework fairly static so that users get an almost instant response to the site loaded and then start the angular app with something like this
angular.bootstrap(document.getElementById("container"), ["app"])
Ref for the api - https://docs.angularjs.org/api/ng/function/angular.bootstrap
Ref for a demonstration of this - https://egghead.io/lessons/angularjs-angular-bootstrap-app-init
My expectation then is that you will be able to
Load your static elements quickly (which will just have placeholders for your content/material)
Access the data you want in the order you want to get it to present on the screen
Release any other part of the app you need to chrome it up/decorate or populate side items.
I'm trying to improve the user perception of page load time of some web pages. These web pages take about 5 seconds to complete loading and rendering. The overall time is fine; but on clicking a link to load a page, nothing happens for about 4.5 seconds and then the whole page appears in one shot. This spoils the user experience, since the user is left wondering if anything is happening or not after clicking the link.
As I understand it, browsers are supposed to progressively render web pages as and when the resources available to render portions of the page become available to it. One thing I've seen recommended (by YSlow for eg:) is to put the css in the head and the javascript near the ending body tag - or as near the end of the page as possible. I've done this, but I don't see the initial part of the page rendering and then pausing for the javascript to load. The theory, as I understand it, is that the page will begin rendering progressively once all the CSS is loaded. I also understand that the page will pause rendering when any javascript is being executed/downloaded.
What else can affect progressive rendering on IE, especially on IE7?
I found out that javascript (specifically, some jQuery selectors) were slowing things down and preventing the page from rendering. We first optimized the jQuery code by removing some code which was repeatedly selecting the same elements. Then moved the code down to $.ready so that it executes after the page has loaded.
Overall, this has given us a 2 second boost in page load times as well as allowing more pages to load progressively.
A first step may be to understand what's going on on the network side, a tool like Fiddler will help you. In your case, Timeline display should be a good starting point.
Why not show notifications to users when a link is clicked that the page is currently in loading state.
You can do this:
window.onbeforeunload = function(e){ document.body.innerHTML='loading...';/*or even a better content/* };
I'm having the same load problems because of flash videos on a page. Will somebody tell me why oh my God why can't ie just load pages as nicely as firefox does???
If ie went out of business today, all the hours and days and nights I've wasted would be over.
I think it's about time that ie get with the demands of web maasters in 2009 and change the way they load pages.
If java script is used, people without java will see blank spaces.
Check for unclosed tags.
Check all images have width and height attributes.