It turns it into a JPG file with 50% compression and a width of maximum 1400 pixels, typically resulting in a <100kb image, which is often ten times smaller than the original. This means that a standard image in markdown, like this: !(/uploads/image.png) The file is called ‘/layouts/_default/_markup/render-image.html’ and contains the following code: This answer to a relatively unrelated question, I realized Hugo can resize standard markdown images through render hooks! I immediately browsed through the docs and created a hook to add to my most recent project… and it worked! Although shortcodes were a step in the right direction, ‘regular’ markdown editors (like my CMSĬms. is using) still created unresized images. The command to do so had to be written in a shortcode or a layout. When I switched to Hugo in June 2021 I was happy to find that Hugo could resize images ‘on build time’. However, images in my markdown were still not resized, often resulting in huge page loads. It resized your images on the fly and kept it in their cache for 30 days. When I switched to Jekyll in 2015 I found out that I could no longer resize images automatically. It explains every token in your expression and speeds up the learning process.Before 2015 I was building WordPress websites. You can use RegExr to help build and test your own regex. The other expression used for height - (?<=h:\s?)\d - does the same, except we are looking for an h instead of w. So you check for an optional whitespace with \s?. In this case, the w: and digits are separated with a whitespace, but it can be left out ( w:600). The lookbehind checks that the string contains a w: substring before the digits. The expression only matches digits ( \d ) inside a given string, but with a positive lookbehind. Although regex can look scary, the (?<=w:\s?)\d expression can be explained in 2 parts. Speaking about regex, in JavaScript, it goes between / and /g. Finally, you set fallback values in case the alt text in Markdown doesn’t contain required properties.You extract width and heigh from the second substring using regex.You split the alt prop into two substrings and extract the actual alt text from first substring.That function receives img element attributes that you can extract from the props argument.You pass ReactMarkdown an object that maps img element to a function through its components prop.Then you can use Node’s File System module to read it.įor the sake of simplicity, I am storing the Markdown in a variable here. Usually you keep MDX content in a file with a. Let’s use next-mdx-remote to accomplish this. Another option is to use Contentlayer, which already has built-in MDX support. You can check out my article about adding MDX to a Next.js project to learn how to do that. In other words, you can use React components inside Markdown with MDX.įirst, you need to add MDX support to your project. The easiest way to use next/image in Markdown is to use MDX, since it allows you to use JSX inside Markdown. Now, let’s jump right into this challenge. You could also potentially change elements to next/image by hand using unified ecosystem, but that’s out of scope of this article. Substituting with next/image with react-markdown.Using next/image inside Markdown with MDX.You can resize image by using width and height keyword options. And in this post, we will look into two possible 2 ways: The skinny framework for creating slide deck from Markdown. There is more than one solution to this problem. So, you might be wondering how to use next/image with Markdown instead. If you know about the benefits of using the Image component provided by Next.js, it is tempting to use it everywhere.īut, the images coming from Markdown are plain old elements.
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