box-overlap

Check whether two boxes overlap

Installation

npm install box-overlap

Usage

const { areBoxesOverlapping } = require('box-overlap');

// This value can also be expressed as `{ top: 1, left: 0, bottom: 4, right: 2 }`.
const a = { x: 0, y: 1, width: 2, height: 3 };

//  0 1 2
// +-+-+-+
// |F| | | 0
// +-+-+-+
// |T|a| | 1
// +-+-+-+
// |a|a| | 2
// +-+-+-+
// |a|a| | 3
// +-+-+-+
console.log(areBoxesOverlapping(a, { x: 0, y: 1, width: 1, height: 1 }));  // -> true
console.log(areBoxesOverlapping(a, { x: 0, y: 0, width: 1, height: 1 }));  // -> false

//  0 1 2
// +-+-+-+
// | | | | 0
// +-+-+-+
// |a|a| | 1
// +-+-+-+
// |a|a| | 2
// +-+-+-+
// |T|a| | 3
// +-+-+-+
// |F| | | 4
// +-+-+-+
console.log(areBoxesOverlapping(a, { x: 0, y: 3, width: 1, height: 1 }));  // -> true
console.log(areBoxesOverlapping(a, { x: 0, y: 4, width: 1, height: 1 }));  // -> false

//  1 0 1 2
// +-+-+-+-+
// | | | | | 0
// +-+-+-+-+
// |F|T|a| | 1
// +-+-+-+-+
// | |a|a| | 2
// +-+-+-+-+
// | |a|a| | 3
// +-+-+-+-+
console.log(areBoxesOverlapping(a, { x: 0, y: 1, width: 1, height: 1 }));  // -> true
console.log(areBoxesOverlapping(a, { x: -1, y: 0, width: 1, height: 1 }));  // -> false

//  0 1 2
// +-+-+-+
// | | | | 0
// +-+-+-+
// |a|T|F| 1
// +-+-+-+
// |a|a| | 2
// +-+-+-+
// |a|a| | 3
// +-+-+-+
console.log(areBoxesOverlapping(a, { x: 1, y: 1, width: 1, height: 1 }));  // -> true
console.log(areBoxesOverlapping(a, { x: 2, y: 0, width: 1, height: 1 }));  // -> false

Use cases

• For coordinate calculation of 2D
• For results got in getBoundingClientRect