drop

Drop is a JavaScript library for creating positioning engines and dropdown menus. It allows developers to create customizable, positioning-aware dropdowns that can be attached to any element on a webpage. Drop is lightweight, dependency-free, and designed to be highly flexible and extensible.

Pros

• Lightweight and dependency-free, making it easy to integrate into existing projects
• Highly customizable with a wide range of options for positioning and behavior
• Supports both mouse and touch events for broad device compatibility
• Extensible architecture allows for easy creation of custom themes and plugins

Cons

• Documentation could be more comprehensive, especially for advanced use cases
• Limited built-in themes, requiring more custom styling for complex designs
• May require additional effort to ensure accessibility compliance
• Not actively maintained, with the last major update in 2019

Code Examples

Creating a basic dropdown:

const drop = new Drop({
  target: document.querySelector('#target-element'),
  content: 'This is the dropdown content',
  position: 'bottom left',
  openOn: 'click'
});

Customizing dropdown behavior:

const customDrop = new Drop({
  target: document.querySelector('#custom-target'),
  content: document.querySelector('#custom-content'),
  classes: 'my-custom-class',
  tetherOptions: {
    constraints: [
      {
        to: 'window',
        pin: true,
        attachment: 'together'
      }
    ]
  }
});

Using callbacks:

const callbackDrop = new Drop({
  target: document.querySelector('#callback-target'),
  content: 'Callback dropdown',
  beforeOpen: () => console.log('About to open'),
  open: () => console.log('Dropdown opened'),
  close: () => console.log('Dropdown closed')
});

Getting Started

1. Install Drop via npm:

   npm install tether-drop
   

2. Import Drop in your JavaScript file:

   import Drop from 'tether-drop';
   

3. Create a new Drop instance:

   const myDrop = new Drop({
     target: document.querySelector('#my-target'),
     content: 'Hello, Drop!',
     position: 'bottom center',
     openOn: 'click'
   });
   

4. To open or close the dropdown programmatically:

   myDrop.open();
   myDrop.close();