#inline code

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Amazon Bedrock Flows: Unlock Powerful Conversational AI

Today, we are excited to announce the public preview of support for inline code nodes in Amazon Bedrock Flows. With this powerful new capability, you can write Python scripts directly within your workflow, alleviating the need for separate AWS Lambda functions for simple logic. This feature streamlines preprocessing and postprocessing tasks (like data normalization and response formatting),…

Amazon Bedrock Flows: Unlock Powerful Conversational AI

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Inline SVG code within CSS using LESS

Here’s a funky trick for you. Using CSS pre-processors like LESS and SASS/SCSS are pretty sweet as they allow you extra functionality like nested selectors, variables, mixins and other sweet dynamic things when you're building CSS.

I have been working on a project recently (except it was using SCSS/Compass, not LESS), and I had a use-case where I just wanted to inline SVG code to use as a background image directly in the CSS file. It’s cool because nifty browsers support inline images (think base64-encoded PNGs, for example), except I just wanted plain ol’ SVG code to make some simple elements have the same shared colours as the project’s.

I had used inline SVG code before, but it was just as an experiment years ago. A quick Google online came up with CSS Tricks' article "Probably Don't Base64 SVG", which I used as a guide for inlining SVG code.

For that project I mentioned earlier, I ended up digging into Compass and Ruby and wrote an inline-svg-code method (check out the fork here). I also wrote another function inline-svg-to-png to output as a base64-encoded PNG image. Compass is kinda chuggy though, and most of the time I use LESS (when I can choose to use it) as I prefer it's simplier syntax which more closer resembles actual CSS.

Once I had some time in the weekend, I looked into porting the same functionality as the Compass inline-svg-code method to LESS. Thankfully LESS supports URL-encoding strings from the get-go! Really saved me a lot of work and makes me love LESS just that little bit more.

The LESS mixin

Since LESS supports URL-encoding strings out of the box, it was a cinch to write a mixin to handle the basic encoding of the SVG code:

// Inline SVG code images in LESS CSS // @author Matt Scheurich (http://lvl99.com) // Github: https://github.com/lvl99/less-inline-svg-code .inline-svg-code( @code ) { @-svg-code: escape(~'<?xml version="1.0" ?>@{code}'); @-inline-svg-code: ~'data:image/svg+xml,@{-svg-code}'; @-inline-svg-url: ~"url('@{-inline-svg-code}')"; }

Pretty simple and straight-forward, eh? You can copy and paste that snippet above, or if you want to view the Github repo, check it out at github.com/lvl99/less-inline-svg-code.

You can see the mixin sets 3 variables: @-svg-code, @-inline-svg-code and @-inline-svg-url. This is because LESS doesn’t support custom returning functions, but relies on mixins to set variables which can then be referenced by the class/mixin blocks.

Basic example

Here’s a basic example on how to use the mixin:

.example-1 { display: block; width: 300px; height: 300px; margin: 0 auto; background-repeat: no-repeat; background-position: center center; background-size: contain; overflow: hidden; text-align: left; text-indent: -999em; // Encode the SVG image code into a string which can be used within this class declaration .inline-svg-code(~'<svg width="600" height="600" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 600 600" preserveAspectRatio="xMin yMin"><g><rect fill="white" stroke="#000" stroke-width="1.5" x="110.75" y="299.25" width="180" height="180" id="rectangle"/><circle fill="white" stroke="#000" stroke-width="1.5" cx="300" cy="300" r="107.5" id="circle"/><path fill="white" stroke="#000" stroke-width="1.5" d="m430.75,120.75l-123.5,176l242,0l-118.5,-176z" id="triangle"/></g></svg>'); // Apply the background image using the `@-inline-svg-url` variable background-image: @-inline-svg-url; }

Outputs as:

.example-1 { display: block; width: 300px; height: 300px; margin: 0 auto; background-repeat: no-repeat; background-position: center center; background-size: contain; overflow: hidden; text-align: left; text-indent: -999em; background-image: url('data:image/svg+xml,%3C?xml%20version%3D%221.0%22%20?%3E%3Csvg%20width%3D%22600%22%20height%3D%22600%22%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewbox%3D%220%200%20600%20600%22%20preserveAspectRatio%3D%22xMin%20yMin%22%3E%3Cg%3E%3Crect%20fill%3D%22white%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20x%3D%22110.75%22%20y%3D%22299.25%22%20width%3D%22180%22%20height%3D%22180%22%20id%3D%22rectangle%22/%3E%3Ccircle%20fill%3D%22white%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20cx%3D%22300%22%20cy%3D%22300%22%20r%3D%22107.5%22%20id%3D%22circle%22/%3E%3Cpath%20fill%3D%22white%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20d%3D%22m430.75,120.75l-123.5,176l242,0l-118.5,-176z%22%20id%3D%22triangle%22/%3E%3C/g%3E%3C/svg%3E'); }

Check out this example on Codepen.io:

See the Pen Basic example of inlining SVG code using LESS by Matt Scheurich (@lvl99) on CodePen.

Dynamic example with variable interpolation

But how’s about that variable interpolation I talked about earlier to support dynamic colours and other things? Check this out:

// I've created a dynamic mixin to generate consistent SVG image code that can support color changes .example-inline-svg( @color-triangle: white, @color-square: white, @color-circle: white ) { @example-svg-code: ~'<svg width="600" height="600" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 600 600" preserveAspectRatio="xMin yMin"><g><rect fill="@{color-square}" stroke="#000" stroke-width="1.5" x="110.75" y="299.25" width="180" height="180" id="rectangle"/><circle fill="@{color-circle}" stroke="#000" stroke-width="1.5" cx="300" cy="300" r="107.5" id="circle"/><path fill="@{color-triangle}" stroke="#000" stroke-width="1.5" d="m430.75,120.75l-123.5,176l242,0l-118.5,-176z" id="triangle"/></g></svg>'; // Here I apply the inline SVG code mixin to retrieve the encoded URL to set as the background-image .inline-svg-code(@example-svg-code); background-image: @-inline-svg-url; } .example-2 { display: block; width: 100%; height: 300px; background-repeat: no-repeat; background-position: center center; background-size: contain; overflow: hidden; text-align: left; text-indent: -999em; // Here I set the initial state, which will be based on the default color values .example-inline-svg(); // Let's do some further customisation based on responsive widths... // -- RGB, bebe @media screen and (min-width: 500px) and (max-width: 799px) { .example-inline-svg(red, green, blue); } // -- How 'bout some red, white and blue (Viva la France!) @media screen and (min-width: 800px) and (max-width: 1199px) { .example-inline-svg(red, white, blue); } // -- Greyscale for fun @media screen and (min-width: 1200px) { .example-inline-svg(black, grey, white); } }

Outputs as:

.example-2 { display: block; width: 100%; height: 300px; background-repeat: no-repeat; background-position: center center; background-size: contain; overflow: hidden; text-align: left; text-indent: -999em; background-image: url('data:image/svg+xml,%3C?xml%20version%3D%221.0%22%20?%3E%3Csvg%20width%3D%22600%22%20height%3D%22600%22%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewbox%3D%220%200%20600%20600%22%20preserveAspectRatio%3D%22xMin%20yMin%22%3E%3Cg%3E%3Crect%20fill%3D%22white%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20x%3D%22110.75%22%20y%3D%22299.25%22%20width%3D%22180%22%20height%3D%22180%22%20id%3D%22rectangle%22/%3E%3Ccircle%20fill%3D%22white%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20cx%3D%22300%22%20cy%3D%22300%22%20r%3D%22107.5%22%20id%3D%22circle%22/%3E%3Cpath%20fill%3D%22white%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20d%3D%22m430.75,120.75l-123.5,176l242,0l-118.5,-176z%22%20id%3D%22triangle%22/%3E%3C/g%3E%3C/svg%3E'); } @media screen and (min-width: 500px) and (max-width: 799px) { .example-2 { background-image: url('data:image/svg+xml,%3C?xml%20version%3D%221.0%22%20?%3E%3Csvg%20width%3D%22600%22%20height%3D%22600%22%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewbox%3D%220%200%20600%20600%22%20preserveAspectRatio%3D%22xMin%20yMin%22%3E%3Cg%3E%3Crect%20fill%3D%22green%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20x%3D%22110.75%22%20y%3D%22299.25%22%20width%3D%22180%22%20height%3D%22180%22%20id%3D%22rectangle%22/%3E%3Ccircle%20fill%3D%22blue%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20cx%3D%22300%22%20cy%3D%22300%22%20r%3D%22107.5%22%20id%3D%22circle%22/%3E%3Cpath%20fill%3D%22red%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20d%3D%22m430.75,120.75l-123.5,176l242,0l-118.5,-176z%22%20id%3D%22triangle%22/%3E%3C/g%3E%3C/svg%3E'); } } @media screen and (min-width: 800px) and (max-width: 1199px) { .example-2 { background-image: url('data:image/svg+xml,%3C?xml%20version%3D%221.0%22%20?%3E%3Csvg%20width%3D%22600%22%20height%3D%22600%22%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewbox%3D%220%200%20600%20600%22%20preserveAspectRatio%3D%22xMin%20yMin%22%3E%3Cg%3E%3Crect%20fill%3D%22white%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20x%3D%22110.75%22%20y%3D%22299.25%22%20width%3D%22180%22%20height%3D%22180%22%20id%3D%22rectangle%22/%3E%3Ccircle%20fill%3D%22blue%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20cx%3D%22300%22%20cy%3D%22300%22%20r%3D%22107.5%22%20id%3D%22circle%22/%3E%3Cpath%20fill%3D%22red%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20d%3D%22m430.75,120.75l-123.5,176l242,0l-118.5,-176z%22%20id%3D%22triangle%22/%3E%3C/g%3E%3C/svg%3E'); } } @media screen and (min-width: 1200px) { .example-2 { background-image: url('data:image/svg+xml,%3C?xml%20version%3D%221.0%22%20?%3E%3Csvg%20width%3D%22600%22%20height%3D%22600%22%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20viewbox%3D%220%200%20600%20600%22%20preserveAspectRatio%3D%22xMin%20yMin%22%3E%3Cg%3E%3Crect%20fill%3D%22grey%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20x%3D%22110.75%22%20y%3D%22299.25%22%20width%3D%22180%22%20height%3D%22180%22%20id%3D%22rectangle%22/%3E%3Ccircle%20fill%3D%22white%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20cx%3D%22300%22%20cy%3D%22300%22%20r%3D%22107.5%22%20id%3D%22circle%22/%3E%3Cpath%20fill%3D%22black%22%20stroke%3D%22%23000%22%20stroke-width%3D%221.5%22%20d%3D%22m430.75,120.75l-123.5,176l242,0l-118.5,-176z%22%20id%3D%22triangle%22/%3E%3C/g%3E%3C/svg%3E'); } }

Check out this example on Codepen.io:

See the Pen Dynamic example of inlining SVG code using LESS by Matt Scheurich (@lvl99) on CodePen.

[ngodingkode-blog-blog]

Why should I ever use inline code?

Why should I ever use inline code?

I’m a C/C++ developer, and here are a couple of questions that always baffled me.

Is there a big difference between “regular” code and inline code?

Which is the main difference?

Is inline code simply a “form” of macros?

What kind of tradeoff must be done when choosing to inline your code?

Thanks

Best Answer

Is there a big difference between “regular” code and inline code?

Yes and no. No,…

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