Jump to content

AJAX or Lazy Loading


michelangelo
 Share

Recommended Posts

Hello there,

I am building my website, which has a dozen projects with 10 images each. Basically, I need a filtering system but built in the most efficient and user-friendly way. You can see below that the images flow sideways so being hidden, JS lazy loading was a good tool, but I just wanted to try AJAX. Is it fit for this purpose or it's more for dynamic content?
 

Screenshot 2019-11-02 at 19.00.39.png

Link to comment
Share on other sites

In this case I wouldn't want to have the overhead of having to set up an API endpoint and rendering AJAX-loaded content in JS, but use simple lazy loading. I.e. leave the src attribute of the images that are not initially visible out, and include a data-src attribute or similar instead, then dynamically programmatically replace the src attribute once the images get close to the viewport.

Or, you know, use native lazy loading which has landed in Chrome and is a progressive enhancement so you don't need any JS at all, but can be polyfilled as well if you want to. Has pretty good browser support out of the box as well.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By Liam88
      Hi,
      I'm really struggling with this as it's something not in my wheelhouse. I'm creating a blog style page (a grid of cards) which has attributes.
      I have a snip of javascript which grabs values from checkboxes which are put into a value like the below:
      ?content=static_video&channel=facebook-ads_instagram-ads
      document.querySelector("form").onsubmit=ev=>{ ev.preventDefault(); let o={}; ev.target.querySelectorAll("[name]:checked").forEach(el=>{ (o[el.name]=o[el.name]||[]).push(el.value)}) console.log(location.pathname+"?"+ Object.entries(o).map(([v,f])=> v+"="+f.join("_")).join("&") ); document.location.href = location.pathname+"?"+ Object.entries(o).map(([v,f])=> v+"="+f.join("_")).join("&"); } As I'm currently refeshing the page on button click with those values the end result includes the location but can easily remove this.
      I then use this value in "input->get" to get the values which I then append to a find() rule. See code below:
      $selector = "template='adbank_pages',sort=published,include=all,status!=hidden"; // Get the channel and content inputs $channel = $input->get->channel; $content = $input->get->content; if($channel){ // Grab the channel string, explode into an array for checkbox checking and then replace _ with | to create or rules in the selector. $chanArray = explode("_", $channel); $chan = $channel = str_replace('_', '|', $channel); $selector = $selector .= ",ab_channels=$chan"; } if($content){ // Grab the content string, explode into an array for checkbox checking and then replace _ with | to create or rules in the selector. $contArray = explode("_", $content); $cont = $content = str_replace('_', '|', $content); $selector = $selector .= ",ab_content=$cont"; } if($input->get){ // If a valid input result $all = $pages->find($selector); } }else{ // If no input show them all $all = $page->children("template='adbank_pages',sort=-published,include=all,status!=hidden"); } $items = $all->find("limit=12"); // Limit the output and use pagination As mentioned above I currently refresh the page to adjust the $selector filter within the $all with a fallback $all if there are no results.
      I know I need to use AJAX to filter the content without refresh but I am really struggling with the set up. I have read multiple posts including the original by Ryan but still confused.
      If anyone can direct/help on this it would be appreciated.
      Thank you
    • By jom
      Chäs & Co is a b2b cheese trader. They love good cheese and are proud of their excellent knowledge und connections to small cheese producers. They maintain a custom made database and used to copy/paste (!) the cheese infos to the former CMS (Contao). Since substituting the database with ProcessWire was no option, they export now the database to a csv file and import it to the new website (expanded version of module ImportPagesCSV).
      From there, the pw magic begins. The staff works with the admin interface: They search and find products in notime using the build-in search field (using cheese names or id. Using ids only possible by adding hook, see this forum thread). They generate price lists easily based on a template, providing checkboxes and option buttons for some restrictions, choose i.e. the cheese origin and price audience (all implemented as page selectors). By saving the page a PDF list gets generated (using mpdf, a php pdf library).
      The visitors can sort and filter the products using a form by shuffle.js. Product details are shown in a popup (fancybox). There's also the option for generating a nice pdf data sheet. No CSS framework being used.
      Other modules used: ProcessJumpLinks, ProcessProMailer, ProcessWireUpgrade.
      Visual design: Nicole Haller


    • By markus_blue_tomato
      We have created a module to create BlurHash strings for images while uploading in ProcessWire. This blurry images will be saved in the database because they are very small (20-30 characters) and can be used for Data-URL's  as placeholders for image-lazy loading.
      https://github.com/blue-tomato/ImageBlurhash
      E.g. where we use this in production:
      https://www.blue-tomato.com/en-INT/blue-world/ https://www.blue-tomato.com/en-INT/blue-world/products/girls-are-awesome/ https://www.blue-tomato.com/en-INT/buyers-guides/skateboard/skateboard-decks/ https://www.blue-tomato.com/en-INT/team/anna-gasser/
    • By ICF Church
      Hi 👋
      Anyone else having this problem?
      Requirements:
      - Repeater (matrix & normal) with mutlilanguage fields (text, textarea…) 
      - Backend language set to something other than default (ie. German) 
      Reproduce:
      - Add a new repeater Item (ajax, I found no way to possible to disable it with matrix)

      (Notice how the default language tab is active instead of the backend language…)
      - Write something into the (default language) field
      - Try to save, if field is required, this will not work. If not required, then when reloading, the content will be inside the backend language field, instead of the default language field who was (presumably) active
      Analysis:
      When  loading  a new repeater element with ajax, the default langue tab is active, but the backend language inputfield is visible (with no visual indication). When writing into the field, it will populate the backend language. When manually clicking on the default language tab (which is already active), the field will switch to the actual default language field (which is [now] empty) (that can now be populated…)
      Also Notice, the labels of the elements to be added are in default language as well instead of the translated label (images instead of Bilder)…
      ProcessWire 3.0.148, Profields 0.0.5…
      Is it my system configuration, or does anyone else have the same issue? This is a screen recording of the problem:
      Issue: https://github.com/processwire/processwire-issues/issues/1179

      Screen Recording 2020-02-25 at 14.18.31.mov
    • By Bacelo
      Hi there,
      I have a bit of trouble on filtering correctly some event pages by some selectors...
      I do have the following 2 date fields:
      - start date (fieldname = date)
      - end date (fieldname = enddate)

      Some events are a single day event (only start date) - some are a multi day event (end date).
      Past single day events should not show up.
      Current multi day events should show up (even if start day is in the past, but end date is future).
      So I have the following selector:
      if ($standort == '') { $termine = $page->children("sort=date, limit=10, (date>=today, enddate=''), (enddate>=today)"); } else { $termine = $page->children( "(standort_reference~=$standort), (standort_alle=1), (date>=today, enddate=''), (enddate>=today), sort=date, limit=10"); } This selector
      $termine = $page->children("sort=date, limit=10, (date>=today, enddate=''), (enddate>=today)"); works fine, but the follwing does not work (all past entries are also shown):
      $termine = $page->children( "(standort_reference~=$standort), (standort_alle=1), (date>=today, enddate=''), (enddate>=today), sort=date, limit=10"); I have no clue what I'm missing - any ideas?
×
×
  • Create New...