Popper.js
- -- A library used to position poppers in web applications. -
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-## Wut? Poppers?
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-A popper is an element on the screen which "pops out" from the natural flow of your application.
-Common examples of poppers are tooltips, popovers and drop-downs.
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-
-## So, yet another tooltip library?
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-Well, basically, **no**.
-Popper.js is a **positioning engine**, its purpose is to calculate the position of an element
-to make it possible to position it near a given reference element.
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-The engine is completely modular and most of its features are implemented as **modifiers**
-(similar to middlewares or plugins).
-The whole code base is written in ES2015 and its features are automatically tested on real browsers thanks to [SauceLabs](https://saucelabs.com/) and [TravisCI](https://travis-ci.org/).
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-Popper.js has zero dependencies. No jQuery, no LoDash, nothing.
-It's used by big companies like [Twitter in Bootstrap v4](https://getbootstrap.com/), [Microsoft in WebClipper](https://github.com/OneNoteDev/WebClipper) and [Atlassian in AtlasKit](https://aui-cdn.atlassian.com/atlaskit/registry/).
-
-### Popper.js
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-This is the engine, the library that computes and, optionally, applies the styles to
-the poppers.
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-Some of the key points are:
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-- Position elements keeping them in their original DOM context (doesn't mess with your DOM!);
-- Allows to export the computed informations to integrate with React and other view libraries;
-- Supports Shadow DOM elements;
-- Completely customizable thanks to the modifiers based structure;
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-Visit our [project page](https://fezvrasta.github.io/popper.js) to see a lot of examples of what you can do with Popper.js!
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-Find [the documentation here](/docs/_includes/popper-documentation.md).
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-
-### Tooltip.js
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-Since lots of users just need a simple way to integrate powerful tooltips in their projects,
-we created **Tooltip.js**.
-It's a small library that makes it easy to automatically create tooltips using as engine Popper.js.
-Its API is almost identical to the famous tooltip system of Bootstrap, in this way it will be
-easy to integrate it in your projects.
-The tooltips generated by Tooltip.js are accessible thanks to the `aria` tags.
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-Find [the documentation here](/docs/_includes/tooltip-documentation.md).
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-## Installation
-Popper.js is available on the following package managers and CDNs:
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-| Source | |
-|:-------|:---------------------------------------------------------------------------------|
-| npm | `npm install popper.js --save` |
-| yarn | `yarn add popper.js` |
-| NuGet | `PM> Install-Package popper.js` |
-| Bower | `bower install popper.js --save` |
-| unpkg | [`https://unpkg.com/popper.js`](https://unpkg.com/popper.js) |
-| cdnjs | [`https://cdnjs.com/libraries/popper.js`](https://cdnjs.com/libraries/popper.js) |
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-Tooltip.js as well:
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-| Source | |
-|:-------|:---------------------------------------------------------------------------------|
-| npm | `npm install tooltip.js --save` |
-| yarn | `yarn add tooltip.js` |
-| Bower* | `bower install tooltip.js=https://unpkg.com/tooltip.js --save` |
-| unpkg | [`https://unpkg.com/tooltip.js`](https://unpkg.com/tooltip.js) |
-| cdnjs | [`https://cdnjs.com/libraries/popper.js`](https://cdnjs.com/libraries/popper.js) |
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-\*: Bower isn't officially supported, it can be used to install Tooltip.js only trough the unpkg.com CDN. This method has the limitation of not being able to define a specific version of the library. Bower and Popper.js suggests to use npm or Yarn for your projects.
-For more info, [read the related issue](https://github.com/FezVrasta/popper.js/issues/390).
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-### Dist targets
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-Popper.js is currently shipped with 3 targets in mind: UMD, ESM and ESNext.
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-- UMD - Universal Module Definition: AMD, RequireJS and globals;
-- ESM - ES Modules: For webpack/Rollup or browser supporting the spec;
-- ESNext: Available in `dist/`, can be used with webpack and `babel-preset-env`;
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-Make sure to use the right one for your needs. If you want to import it with a `