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Responsive images in Webflow

Webflow creates variants of your uploaded images to make sure they're responsive, look great, and load quickly on any device. This can help your mobile pages load up to 10 times faster.

In short, making your images responsive means that your browser serves a different sized version of that image based on the size of the image on your page and the screen resolution (adding srcset and sizes attributes to your <img> elements). To do this, Webflow creates a set of variants for each image upon upload (details below), then encodes instructions for your browser to know when to serve each variant.

Important: If your original images are compressed enough, Webflow uses your originals.

Manually generate responsive images across a project

We measure your images and generate responsive variants as you work on the current page. But you may make changes that affect images on other pages (say, by updating a symbol or class). In that case you can either visit the affected page, or just hit CMD+SHIFT+I (CTRL+SHIFT+I on Windows) and the designer will scan and re-measure all your pages for you.

Generate responsive images for projects built before September 2016

If you created your site before September 14th, 2016, you'll need to walk through a quick process to generate responsive images on your site. Next time you open the Designer, you'll see a modal asking you to start this process. 

Disable responsive images

You can disable this feature for a specific image by hitting CMD+SHIFT+O on Mac or CTRL+SHIFT+O on Windows, then clicking the checkbox that's revealed in the image settings panel.

Display the option to disable an image's "responsiveness" by hitting CMD+SHIFT+O on Mac or CTRL+SHIFT+O on Windows.

Manage responsive images with interactions

Webflow measures images in their normal states, not in hover states or interactions that may change the size of the image, so it's a good idea to look through your site and make sure everything looks ok.

In some cases, you may need to add additional styling to override the sizes attributes effect on image element dimensions, for example, by setting the image's width to 100% to fill its container. 

Common questions about responsive images

What are the supported image types?

This feature generates responsive variants for all inline JPGs and PNGs, except those added via rich text elements. It also doesn't apply to background images. We recommend SVGs and PNGs for high detail or vector based images, since these have lossless compression.

What size images should I upload?

You can upload any image size you'd like, provided it is smaller than our 4MB limit. Your browser will serve whichever variant is best, based on device size and resolution. For example, if you upload a 4000px wide original image but it is only rendered at 300px width on mobile, your browser will serve the 500px variant that Webflow created in that context.

How many variants are generated per image?

The number of variants Webflow generates depends on the image's original size. If it's bigger than 3200px wide, Webflow will generate seven variants: 3200px, 2600px, 2000px, 1600px, 1080px, 800px, and 500px.

How are images compressed?

We use libvips to resize images at 100% quality to each of the target variant sizes. The original image does not go through any compression after you upload it, but after resizing, the variants will go through a compression step.

JPEGs are optimized using jpeg-recompress with the following configuration:

  • quality: veryhigh
  • ‍method: ssim
  • target: 0.999
  • ‍min: 40
  • max: 100
  • ‍loops: 10
  • ‍progressive: true

PNGs are optimized using pngquant with the following configuration:

  • nofs: true
  • quality: 100
  • speed: 10

In other words, this means:

  • We compress JPEGs with a tool that uses visual approximation to try and get the result to look like the original to the human eye, while making them load progressively which just makes your site feel even faster.
  • We use lossless compression on PNGs that identifies and describes patterns of 1s and 0s in a summarized way to minimize file size.

Are responsive variants exported?

Yes, responsive images will have srcset and sizes attributes in the exported site and the variants will be in the /images folder of the .zip file along with your original images.

Helpful resources

You can learn more about responsive images on our detailed blog post on this topic. 

We also recommend Eric Portis' article in A List Apart for those who want to dive deeper into responsive images tech.

Try Webflow — it's free
This video features an old UI. Updated version coming soon!
Sours: https://university.webflow.com/lesson/responsive-images

Improve page load speeds without quality loss to your images.

Optily connects to your webflow sites, and provides an easy and automatic way to optimize your webflow images without quality loss. We partner with the worlds leading image optimization API to deliver the best results possible with complete ease.

Optimizing your images (JPEG/JPG/PNG) can reduce their size by up to 80%, providing significant benefits to page load speeds.

Unless proactively completed prior to development, this can be a very manual process that requires webflow users to save images, run batch optimizing, download images, and replace them on each item.

Trust us, it's not a fun task and it's important it's done properly.
Optily allows you to connect, select the fields, and automate the entire optimisation process.

a) Collection images (CMS)

Images located inside your Collection Lists (CMS) (eg. Blogs, Teams, Listings, Case Studies etc) will be automatically optimized and published upon completion. Please note we only optimize images that are published and a supported format. As Optily works through your images, you will notice we update the modification date.

b) Page images (Non-CMS)

Non CMS Images can be collected and provided to you via a .zip download. Unfortunately due to API restrictions we cannot automatically re-upload and replace these items. We have built a custom solution that uses your sitemap to collect and optimize these images with an easy download.

This won't impact any of your settings, you can simple replace these 1:1 and enjoy the lighter version of the image.

Sours: https://www.optily.co/
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If you are creating a lot of content or have a large library of articles, manually adding social media preview images can become a really cumbersome task. You can however completely automate this process, here's how to do it!

Note: this tutorial will require a paid Webflow account as it uses the Custom Code feature of Webflow which is only for paid users.

Additional note: After more testing it turns out that Webflow Variables are output using HTML Entities which are not URL Safe. Any special characters (e.g. &, $, #) in your Webflow content will break this integration. Hopefully Webflow will offer URL-safe output options in the future so that Bannerbear and other services can use Webflow data safely!

Why add social media images?

Social media preview images (also called Open Graph images) are the images that display when you share content on Twitter, Facebook, Linkedin… the list goes on.

Here's an example of a website with and without a social media preview image.

Without a preview image set

With a preview image set

The image itself can be anything - it could be an image pulled from the article itself automatically, or it can be a properly-formatted image with a title, author photo etc.

Having an eye-catching social media image (or even better, eye-catching and informative) can make the difference between someone clicking your content or scrolling past your content.

In other words, if you are looking to drive traffic from social media to your website, investing in properly formatted social media graphics that look great and encourage people to click, is totally worth it.

How to add social media images manually

Almost every CMS platform out there has a way for you to add these images to a post. So if you want to do this manually it's simply a case of designing the image and then attaching it to your post - in Webflow you can find this in Open Graph Settings.

This is very time consuming though if you have a lot of content. And what if you want to change the design of your social media images later on? You would have to go through and change every image manually… there must be a better way!

How can this be automated?

Instead of doing this on a page by page basis, what we are going to do in this tutorial is edit the Webflow Collection Settings (e.g. Blog Posts) and add a custom code block. This code block will appear on every page in that collection, inserting a dynamic Bannerbear URL that will generate a unique image for each page.

Adding the template in Bannerbear

You can design your own template using the Bannerbear editor, but for now lets use an example template from the library.

There is a Simple Open Graph template in the library that contains a title, subtitle, and an image placeholder. You can control all of these variables via Bannerbear's API in order to generate images on-the-fly.

Add this template to one of your Bannerbear projects.

Feel free to tweak the template to your liking before continuing.

Getting the Query String URL

To integrate with Webflow we will use the Query Strings integration. This is a simple, but powerful integration that enables you to generate images just by changing the query string. We are going to embed this URL in Webflow and then use some dynamic Webflow tags to change the query string for each page, which will result in a different image being generated for each page.

Scroll down on the Bannerbear template page and click the Query Strings icon:

Create a new query string URL Base and click it - you will now see the query string documentation page.

From here you can grab your unique URL Base to generate images with.

How the Query String works

Using this URL Base you can generate images on the fly just by changing parameters the query string.

If you used the Simple Open Graph template from the library you will see that there are a few parameters you can play with:

  • photo—image_url~~
  • title—text~~
  • subtitle—text~~

If you add / remove / rename layers from the base template, these parameters will change so take note.

To generate images, you simply combine your Base URL with a list of modifications you want to make, separated with :::

Here are some examples:

with…

…would result in an image with the title text HELLO

You can add an image by referencing a publicly-accessible URL of any image on the web:

…would result in an image with the title text HELLO and a poster image pulled from the URL specified.

In this way, you can use the Query Strings feature of Bannerbear to generate new images on-the-fly. Next we are going to plug in some WordPress variables into this url so that WordPress creates these URLs for us dynamically, using data from the posts (e.g. post titles).

Disable Rate Limit

Before going to the next step, you may want to turn off the Rate Limit feature in the Query String settings page. When you are doing a lot of testing or generating lots of images in bulk you can turn this off to prevent Bannerbear from blocking your requests.

Pasting the code into Webflow

First of all if you haven't already, make sure that your collection template has a title and description set.

Custom code

To keep things simple for this tutorial we will use the Simple Open Graph template and get it to display the title and the date of a blog article in Webflow. You can also pass an image into this template, but that is something you can try in a follow up step!

In Webflow find your collection template Settings page, in this case it's a blog post template - and scroll to the bottom where it says Custom Code.

Paste the following code inside the box that says "Inside <head> tag":

Adding your Base ID

The URL is currently not pointing to a real Base ID so you need to change YOUR_BASE with your unique Base ID which you can get from the Bannerbear Query String docs page above.

Adding the dynamic title and date tags

Next you need to add special Webflow tags to the URL so that the data changes for each new page (and therefore creates a different image).

Replace TITLE with Name.

Replace DATE with Published On.

Finally your custom code box should look something like this:

Hit save and publish your site!

Testing the results

If you are logged into Twitter you can use the official Twitter Card Validator to plug in your Webflow blog post urls. The first time Twitter hits your page the image will generate - hit preview again to load the image into view.

If you are logged into Facebook you can use the official Facebook Debugger to plug in your Webflow blog post urls. Same deal here, the first time Facebook hits your page the image will generate - hit preview again to load the image into view.

Alternatively you can preview and see the images get generated on-the-fly by using the Bannerbear Twitter / Facebook Preview Tool

The results

Now all of your Webflow content will have properly-formatted social media images, and these will get auto-generated any time you create new content on webflow.

Even better, if you want to update the template design any time you just update it from one place (Bannerbear!).

Questions?

The main question that people ask here is, do you need to "hit" the pages before they are shared on social media, so that the image is ready?

The answer is nope 🐻 The image will be generated on-the-fly the first time that the page is accessed. So for example, if you freshly publish a new post, you can go right ahead and share that link directly on Twitter. In the background, Twitter will scan your page and pull in the image from Bannerbear generated on-the-fly.

So this is a "set and forget" solution!

Next Steps

Why not try these as next steps:

  • Change the background image by passing in an image URL from your Webflow page data
  • Add a layer to the Bannerbear template (e.g. author name) and add that data to the query string
  • Create different templates for different collections on your webflow site
Sours: https://www.bannerbear.com/blog/add-auto-generated-open-graph-images-to-webflow/
The dos and don'ts of image resolution - Webflow tutorial

Image

An image element is an image or an image placeholder you can drop onto your page. You can move it anywhere independent of other elements. The image element is distinct from a background image that's set on another element like a section or a div block.

Image icon thumbnail

In this lesson:

  1. Add image elements
  2. Edit image settings
  3. Replace images
  4. Style images
  5. Add alt attributes

Add images

There are 4 ways you can add an image to your Webflow project:

  1. From the Elements panel
  2. From the Assets panel 
  3. From your computer
  4. From a Quick find search
Learn more about the most common image file types used on the web.

From the Elements panel

To add a new Image to your page, just drag and drop an Image element from the Elements panel. To choose or add an Image, click into the Asset Panel and click Choose image or Upload.

The four elements that are included in the Media section are Image (highlighted), video, YouTube and Lottie Animation.

From the Assets panel

Once you uploaded images to the Asset panel, drag the images onto the canvas.

The assets panel displays a folder dropdown menu, create new folder button, upload button, search assets bar and image thumbnail previews.

You can upload your images to the Assets panel in 2 ways:

  1. Click Upload in the Assets panel and choose the Images you want to upload
  2. Drag and drop the images from your computer into the Assets panel
Learn more about how to add images to the Asset Panel.

From your computer

Drag an image from your computer onto your canvas and drop it where you want it.

Good to know
Webflow creates responsive variants of your images as you upload them to the Asset Panel. However, it’s best to optimize your images before uploading to Webflow. Read more about Image Resolutions.
The maximum file size for images is 4MB.
Troubleshooting — Upload failed
The upload failed alert graphic displays a red circle with diagonal line icon, a file name and a the max size for png files of 4mb notice.

If you get an “upload failed” alert when trying to upload an image, check the following:

  • The image file: Make sure the image file isn't corrupted, has the correct and supported file extension, and isn't larger than 4MB
  • Check Internet Connection: You should be able to upload images with even slow internet connections (minimum 5mbps). To be sure internet speed isn’t an issue, double check your internet connection and verify your signal strength. Troubleshoot your internet connection.
  • Check Browser Extensions: Some browser extensions may cause issues when uploading images to the Webflow Designer. Troubleshoot my browser extensions.

From a Quick find search

Quick find is a powerful search bar within the Webflow Designer. It's an assistant that will help you quicken your workflow and boost your efficiency as you create your projects — and it's just CMD+E / CTRL+E away.

Edit image settings

The image settings panel displays a choose image button, file name, dimensions and size along with a check box for "Image is HiDPI". It also displays two text input fields for width and height. There is a dropdown menu for alt Text and for Load and a show all settings button.

With the image element selected, you can access the image settings 4 ways:

  1. Double click on the image element
  2. Press enter
  3. Click the cog icon next to the image element label
  4. Press D or go to the Settings panel

Choose Image: You can replace the placeholder with any image from your Assets panel. Simply, double click the element and click Choose Image from the settings panel that appears.

Size: You can specify pixel values for width or height. This will set the image size for all breakpoints, but these values can be overridden by setting width and height in the Element Style panel.

Setting a width/height in image settings will apply the values to that image on all device breakpoints. However, you can set different width/height settings for an image when setting them through the Style Panel.

You can also grab the corner of your image and drag to resize it.

Note that as you resize the image, it won't get bigger than its parent element.

HiDPI: When checked, this setting will set your image at half it’s pixel width. So an image that’s 600px wide, will be displayed at 300px. This pixel density will ensure the image looks great on most mobile devices that have HiDPI displays.

The checkbox for "Image is HiDPI" is highlighted on the Image settings panel.

Replace images

The replace image button is highlighted on the Image settings panel.

After you’ve added an image onto your canvas, you can replace it anytime you want.

  1. Open Image settings.
  2. Click the Replace Image button. This will open the Asset Panel.
  3. Choose an existing image or upload a new one.
Step one on the left click the replace button, step two on the right select an image from the assets panel.

Style images

You can style images as you would any other element using the Style panel.

Some styling options don’t apply to images like background styles. To use overlays with images, you can use background images instead.

Using classes to style images is a huge time saver. It allows you to apply a class to multiple images. Editing the class will affect all images with that class. This is especially helpful when specifying size through the Style panel versus the Settings panel. With classes, you can avoid having to manually set sizing for each image as you add them to the project.

The style panel displays the selector section with the class Feature Info Icon selected and the layout, spacing and size sections.

Here are a few style properties that you can use to give character to your images: 

Border Radius: You can set up rounding on one or more corners. 

Drop shadow : You can make your images look like they have popped out of the page.

Filters: You can use different filters such as blur, grayscale, or sepia.

An image duplicated four times with style properties. An example of a border radius, drop shadow, blur and sepia filter properties.

Add alt attributes

An Alt attribute is for the alternative text that appears when, for some reason, an image isn’t loaded on your page. It can be a brief description of the image. This is not only helpful for accessibility but also for search engines to determine what the image is about.

You can specify an Alt attribute for each of your images from the Settings panel.

The Alt Text area is highlighted on the Image settings panel. A custom description has been selected from the drop down menu.

Dynamic alt attribute

The image element can be used in dynamic lists and on dynamic template pages. Learn more about the CMS Image field.

To set a dynamic alt text to these images:

  1. Select the image
  2. Go to the Settings tab
  3. Under Image properties, check Get alt text from
  4. Select the field that contains the alt text for your images
The image settings panel displays a collection list selected to fill out the Alt Text from a Blog post list.
Try Webflow — it's free
This video features an old UI. Updated version coming soon!
Sours: https://university.webflow.com/lesson/image

Images webflow

Multi-image field overview

The Multi-image Field is a Collection field that allows you and your collaborators to upload multiple images for your Collection items and use them in your designs. You can use a Multi-image Field to create dynamic image grids and dynamic lightbox galleries.

At the moment, these images can be used as regular image elements,background images or as Lightbox media within Collection Pages.

You can also use a Multi-image Field to filter a Collection List or set conditional visibility on elements in Collection Lists and pages. Here are some common uses for the Multi-image Field:

  • Photo galleries
  • Product thumbnails
  • Dynamic lightboxes
In this lesson
  1. Create a Multi-image Field
  2. Add images to the Multi-image Field
  3. Use a Multi-image Field in your designs
  4. Filter a Collection List using a Multi-image Field
  5. Set conditional visibility using a Multi-image Field

Create a multi-image field

A Multi-image Field can be added to a new or existing Collection. In Collection settings, click New Field and then choose the Multi-image Field. And as with any field, you can specify if the field is required or not.

Add a Multi-image Field in your Collection settings.

Add images to the multi-image Field

To upload images into a Multi-image Field, drag and drop them into the field or click to upload them. You can upload any accepted image file type.

The maximum file size for images is 4MB. Responsive variants are created for these images upon upload. However, these variants are used only when the images are used as image elements, not on background images.
Drag and drop your images into the Multi-image Field in any Collection item.

Reorder images uploaded to a Multi-image Field

Once your images are uploaded, you can reorder them by dragging them around within the Multi-image Field. Make sure to save the item to save the new order.

Add more images to a Multi-image Field

You can add more images to a Multi-image Field as long as you haven’t reached the 25 image limit per field.

Set alt text for images in a Multi-image Field

You can specify an alt text for each image in a Multi-image Field. This is important for SEO and accessibility. You can add the alt text for each image from the image menu which you can access by clicking the ellipsis (...) that appears on each image as you hover over it.

Delete images from a Multi-image Field

You can also delete any images from the Multi-image Field from the same menu. Click the ellipsis(...) and choose delete.

Use a Multi-image Field in your designs

You can display the images of a Multi-image Field on its Collection page by adding a Collection List on that page and connecting it to the Multi-image Field.

Next, you can either add image elements, div blocks, or lightboxes to display your images.

Connect the Multi-image Field to image elements

  1. Add a Collection List onto the Collection page
  2. Connect the Collection List to the Multi-image Field
  3. Add an image element in the Collection List
  4. In the Image Settings, choose to get the image from the multi image field
  5. Update the layout of the Collection list to create the design you want

Connect the Multi-image Field to background images

You can set images from the Multi-image Field as the background of an element, like a div block, to crop images and fit them in boxes of specific dimensions or shapes. To set a dynamic background image using the Multi-image Field:

  1. Add a Collection List onto the Collection page
  2. Connect the Collection List to the Multi-image Field
  3. Add a div block in the Collection List
  4. In the Element Settings panel, choose to get the BG image from the Multi-image Field
  5. In the Style panel, add a background image to the div block and adjust the background image settings as you like
  6. In the Style panel as well, set the size of the div block
  7. Update the layout of the Collection list to create the design you want

Troubleshooting: If the background image doesn’t look correct:

  1. Make sure you’ve added and set up a background image on the element
  2. Make sure there are no other background images or gradients set on the element
  3. Make sure the element is getting the image from the Multi-image Field. Check the setting in the Element Settings panel.

Connect the Multi-image Field to a lightbox

You can use the Multi-image Field to create dynamic lightboxes.

  1. Add a Collection List onto the Collection page that contains the Multi-image Field
  2. Connect the Collection List to the Multi-image Field
  3. Add a lightbox component in the Collection List
  4. In the Lightbox settings, choose to get the media from the Multi-image Field
  5. Optional: If you want to link the lightboxes together so a user can flip through all images once the lightbox is open, enable the option in the Lightbox settings and specify a lightbox group name.
  6. Update the layout of the Collection list to create the design you want. Choose either one of the following options to create the gallery:

Option 1: Link the Lightbox image placeholder to the Multi-image Field

Select the image element in the lightbox component and in the Image Settings, choose to get the image from the multi image field.

Option 2: Set a background image on the Lightbox link and get the images from the Multi-image Field

  1. Delete the image element in the lightbox component
  2. Select the lightbox link and in the Element Settings panel, choose to get the BG image from the Multi-image Field
  3. In the Style panel, add a background image to the div block and adjust the background image settings as you like
  4. In the Style panel as well, set the size of the div block

Filter a Collection List using a Multi-image Field

Although you cannot filter a Collection List that is connected to a Multi-image Field, you can filter other Collection Lists to only display items that have a specific Multi-image Field set or not set.

For example, you can create a Collection list of “More photos” where you only show items for which you’ve uploaded images in the Multi-image Field.

 To filter a Collection List based on whether a Multi-image Field is set or not:

  1. Select the Collection List you want to filter
  2. In the Element Settings panel, add a filter under Collection List Settings
  3. Select the relevant Multi-image Field in the first dropdown
  4. Choose “is set” in the second field
  5. Save the filter

The filter rules that you can use with the Multi-image Field are:

  • Is Set - looks for Collection items that have images for this Multi-image Field
  • Is Not Set - looks for Collection items that don’t have images set for this Multi-image Field

Learn more about filtering Collection Lists.

Set conditional visibility using a Multi-image field

In the same way, you can set a conditional visibility rule on any element in your Collection List or Page. This will ensure that these elements will only be visible when the Multi-image Field is set for a given Collection item. 

You can use this conditional visibility to display a “see photo album” text link in a Collection List. You can also use it to display a heading (eg. “Photo from this trip”) in the section where you display these images on the Collection page.

  1. Select the element you want to display only when a Multi-image Field is set
  2. In the Element Settings panel, add a condition under Conditional Visibility
  3. Select your Multi-image Field in the first dropdown
  4. Choose “Is Set” in the second dropdown
  5. Save the condition

Learn more about conditional visibility.

Best practices for better web page performance

Loading too many images on a page may slow down your page load speed. So, when you’re pulling up 25 multi-images per page, make sure to optimize your images before uploading them to the CMS or paginate the Collection list connected to the Multi-image Field.

Common questions

Why isn't there filtering and sorting options for Collection lists connected to a multi-image field?

There’s no filtering and sorting options for this Collection List because it automatically shows the images from the connected Multi-image Field in the order that you've added them within the Multi-image Field.

Can I show Multi-image field data in a Collection list connected to the Collection?

Yes! Learn more about nested Collection lists.

Can I import images into a Multi-image field using CSV import?

At the moment, you cannot import multiple images into a Multi-image Field using the Collections import feature.

Try Webflow — it's free
This video features an old UI. Updated version coming soon!
Sours: https://university.webflow.com/lesson/multi-image-field-overview
Use object-fit to crop and fit images into any defined size — Micro lesson #25

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