Is it safe to use css variables ?

• css-vars-ponyfill

  1 1,456 4.1 JavaScript

  Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers

Yes. If you still have IE users, there’s a ponyfill for that.

• browserslist

  55 12,703 7.8 JavaScript

  🦔 Share target browsers between different front-end tools, like Autoprefixer, Stylelint and babel-preset-env

  

many top sites use something like: https://github.com/browserslist/browserslist

• SurveyJS

  surveyjs.io sponsored

  Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  

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