VisuBezier

Provides a preview when hovering CSS easing functions in VS Code.

Features

Hover over any CSS easing function to get a preview of the animation, comparing it to a linear easing (default).

Extension Settings

This extension has a few settings:

• visubezier.defaulteasingfunction: Override the default comparison easing function with any valid easing function expressed as a keyword or a cubic-bezier() function (default: linear).
• visubezier.defaultduration: Override the duration of the animation with any valid duration expressed as 0.5s or 500ms (default: 1s).
• visubezier.defaultbackground: Override the background color for the preview area (default: #2d2d30).
• visubezier.defaultcolor: Override the foreground color for the preview elements (default: #d7d7d7).
• visubezier.defaultlanguages: Override the list of languages for which you want to activate the preview. (default: ["css","sass","scss","less","postcss","stylus","xml","svg"]).

Post-Install Sample

Paste this sample into VS Code after installing to see it in action:

button {
	transition-timing-function: ease;
	transition-timing-function: ease-in;
	transition-timing-function: ease-out;
	transition-timing-function: ease-in-out;
	transition-timing-function: cubic-bezier(0.4, -0.2, 0.42, 1.2);
	transition-timing-function: steps(7);
	transition-timing-function: steps(5, jump-none);
	transition-timing-function: steps(8, jump-both);
	transition-timing-function: steps(4, jump-start);
	transition-timing-function: steps(2, jump-end);
	transition-timing-function: step-start;
	transition-timing-function: step-end;
	transition-timing-function: linear(0, 0.25 25% 75%, 1);
	transition-timing-function: linear(0, 0.063, 0.25, 0.563, 1 36.4%, 0.812, 0.75, 0.813, 1 72.7%, 0.953, 0.938, 0.953, 1 90.9%, 0.984, 1 100% 100%);
	transition-timing-function: ease, steps(3), cubic-bezier(1, 0, 0, 1), linear(0 0%, -0.25, 1.25, 1 100%);
}

Known Issues

• Easing functions (e.g. cubic-bezier(...) and linear(...)) containing any values other than numbers are currently ignored (e.g. calc() or var()).
• Points with negative values can cause the animation to fall out of the preview area.
• linear() easing function animation preview falls back to rendering as a classic ease easing due to VS Code's internal rendering engine not handling the function notation (as of 2023-09-02).

Release Notes

1.6.1

• Fixed parsing of linear() with negative values, and rendering of linear() with a value greater than 1 which was previously clamped to 1.

1.6.0

• Added support for linear() syntax. Animation preview is not yet implemented in VS Code, but the SVG graph is correctly depicted (based on my interpretation of the spec, which I hope to be correct).
• Added a licence file.
• Updated the underlying VS Code Extension required files to run with more modern code (Node 18, TypeScript 5, VS Code 1.76+, and other things I hardly understand).
• Updated the extension's package to patch vulnerabilities.

1.5.0

• Added a defaultlanguages configuration option to only run the extension in relevant languages, overridable by the user if needed. (thanks to @robole for the suggestion and to tjx666 for the example file!).
• Patched a few package vulnerabilities.

1.4.0

• Added support for steps() and step-start/step-end syntax.
• Changed solid underline to a dotted underline.
• Updated comments/typings.

1.3.5

• Patch the security vulnerabilities for url-parse.

1.3.4

• Added an icon before the timing functions that can be previewed. Updated the ignored files.

1.3.2

• Fixed the ease mapping and allow to detect more than one function per declaration.

1.3.1

• Patch the security vulnerabilities for minimist.

1.3.0

• Fixed some greed in the detection regular expression.

1.2.0

• Updated icon and extension name
• Patch the security vulnerabilities for braces, js-yaml and fstream.

1.1.2

• Patch the security vulnerabilities for tar and node.extend.

1.1.1

• Change the detection RegExp to be less greedy and not output false positives.

1.1.0

• Add a preview of the Bézier curve next to the animation.

1.0.0

• Initial release of VisuBezier. 🤘