npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

ts-useful

v1.1.34

Published

Functions for animation, color transitions, ecliptic, bezier, decasteljau, curves, three dimensional curves, smooth scrolling, random range, randomItem, mobius index, vectors, physics vectors, and easing.

Downloads

179

Readme

Useful

Contains:

  • lerp (linear interpolation), animation, bezier algorithm, clamp, clampAngle, clampRadian, color percent, ecliptic, decasteljau algorithm, decasteljau curves, easing, smooth scrolling, three dimensional curves.

Animate

Animate(action: (pct: number) => void , options?: { fps?: number, duration?: number, stop?: () => boolean, cb?: () => void });

*Not available for commonjs libraries.*
import {Animate, Easing} from 'ts-useful';
function scoot(elm: HTMLElement, x: number): void {
  const move = (pct: number) => {
    elm.style.left = `${x * Easing.linear(pct)}px`;
  }
  Animate(move, { fps: 60, duration: 3000 });
}

Bezier

Bezier(number[]) returns (percentage: number) => number;

import {Bezier} from 'ts-useful';
bezier = Bezier([0.0, 0.0, 1.0, 1.0]);
bezier(.2);

Boids

Boids(options?: boidOptions);
Method: Update() => coordinates[];

import {Boids} from 'ts-useful';
const boids = new Boids({ boids: 2 });
or
const boids = new Boids({ boids: [{ position: {x: 10, y: 10}, speed: { x: 0, y: 0 }, acceleration: { x: 0, y: 0 } }] });

boids.Update();

Clamp, ClampAngle, ClampRadian

These functions will make sure a number stays between the min and max values.
Clamp(amount: number, min: number, max: number);
ClampAngle(amount: number, min: number, max: number);
ClampRadian(amount: number, min: number, max: number);

import {Clamp, ClampAngle, ClampRadian} from 'ts-useful';
Clamp(8000, 0, 10);
ClampAngle(45, 0, 90);
ClampRadian(2, 0, 3);

ColorPercent

ColorPercent.getColor(colorList: string[], percent: number);

import {ColorPercent} from 'ts-useful';
ColorPercent.getColor(['#FF00FF', '#889900', '#336699'], .45);

Curves

Curves(points: { x: number, y: number }[], percent: number)

import {Curves} from 'ts-useful';
const points = [
  { x: 10, y: 0 },
  { x: 30, y: 30 },
  { x: 45, y: 10 },
  { x: 20, y: 50 }
];
Curves(points, .4);

Decasteljau

Decasteljau(points: number[], percent: number)

import {Decasteljau} from 'ts-useful';
Decasteljau([1,2,3,4,5,6,7,10], .22);

Easing

Static easing functions.

import {Easing} from 'ts-useful';
const easing = Easing.linear;
easing(.03);
*or*
Easing.linear(.03);

Random is a little different. Easing.random() should be placed outside iterative code otherwise you'll get erratic results from a new easing on every iteration.

import {Easing} from 'ts-useful';
const easing = Easing.random();
easing(.03);

Easing types include: linear, sineIn, sineOut, sineInOut, quadIn, quadOut, quadInOut, cubicIn, cubicOut, cubicInOut, quartIn, quartOut, quartInOut, quintIn, quintOut, quintInOut, expoIn, expoOut, expoInOut, circIn, circOut, circInOut, backIn, backOut, backInOut, boomerang, elasticIn, elasticOut, elasticInOut, bounceIn, bounceOut, bounceInOut, and random.

Ecliptic

Class to allow placing items at coordinates based on an HTMLElement or coordinate { x: number, y: number }
This function uses transform for performance as it will not cause a repaint of the screen.
For best results give the parent HTMLElement this style - transform-origin: 50% 50%;
Give the child HTMLElements these styles - transform-origin: 50% 50%; top: 50%; left: 50%; position: absolute;

Ecliptic.Degree(origin: coordinates, target: coordinates);
Ecliptic.Radian(origin: coordinates, target: coordinates);

Ecliptic.EqualRadians(count: number);
Ecliptic.EqualDegrees(count: number);

Ecliptic.LocationByDegree(center: htmlCoordinate, radius: number, degree: number);
Ecliptic.LocationByRadian(center: htmlCoordinate, radius: number, radian: number);

Ecliptic.ToDegree(radian: number);
Ecliptic.ToRadian(degree: number);

Ecliptic.TransformCoordinates(elm: HTMLElement);

Ecliptic.Surround(item: coordinate, amount: number, options: surroundOptions);
Ecliptic.SurroundHTML(item: htmlCoordinate, withItems: HTMLElement[] | HTMLCollection, options: surroundOptions);

type coordinate = { x: number, y: number };
type htmlCoordinate = HTMLElement | coordinate;
type surroundOptions = { distance?: number, degree?: number, spacing?: number, amplitudeX?: number, amplitudeY?: number };

Example Use:

import {Ecliptic} from 'ts-useful';

const parent = document.getElementById('toSurround');
const kids = document.getElementsByClassName('childItems');
Ecliptic.SurroundHTML(parent, kids, { degree: 90, distance: 120 });
Ecliptic.LocationByDegree(parent, 100, 180);

GravityVector (depricated. Use PhysicsVector)

GravityVector(options: { position: coordinate, gravity: number, mass: number, distanceClamp: { min: number, max: number } });
Extends Vector class.
Methods
attract(target: GravityVector);
applyForce(force: GravityVector);
update();
Properties: velocity: Vector, acceleration: Vector;

const gv1 = new GravityVector();
const gv2 = new GravityVector({ position: { x: 50, y: 50 } });
const force = gv1.attract(gv2);
gv2.applyForce(f);
gv2.update();

Lerp

Lerp(start: number, end: number, percent: number)

import {Lerp} from 'ts-useful';
Lerp(-600, 600, .5);

MobiusIndex

MobiusIndex(length: number, index: number)
If index is negative, it will return the last item and beyond.
If index is greater than length, it will wrap to the first item and beyond.

import {MobiusIndex} from 'ts-useful';
MobiusIndex(3, 0); // Output: 0;
MobiusIndex(3, 1); // Output: 1;
MobiusIndex(3, 2); // Output: 2;
MobiusIndex(3, 3); // Output: 0;
MobiusIndex(3, 4); // Output: 1;
MobiusIndex(3, -1); // Output: 2;

RandomRange

RandomRange(min: number, max: number)

import {RandomRange} from 'ts-useful';
RandomRange(0, 100);

RandomItem

RandomItem(array: any[])

import {RandomItem} from 'ts-useful';
RandomItem([1,2,5]);

SmoothScroll

import {SmoothScroll} from 'ts-useful';
const smoothScroll = new SmoothScroll();
smoothScroll.scroll(element: HTMLElement, options?: IScrollOptions);
 
IScrollOptions {
  offsetY?: number;
  offsetX?: number;
  framesPerSecond?: number;
  duration?: number;
  easingFunc?: (t: number) => number;
  done?: () => void;
}

Sorter

Sorter(array: Array, prop: string, reverse: boolean = false)

import {Sorter} from 'ts-useful';
const array = [{ 'foo': 1, bar: '2' }, { 'foo': '2', bar: '1' }];
Sorter(array, 'bar');

Swipe

import {Swipe} from 'ts-useful';
const swipe = new Swipe(element: HTMLElement, events?: ISwipeEvents);
swipe.(events: ISwipeEvents);
swipe.Destroy();
 
ISwipeEvents {
  left?: () => void;
  right?: () => void;
  up?: () => void;
  down?: () => void;
}

ThreeD

ThreeD(points: { x: number, y: number, z: number }[], percent: number)

import {ThreeD} from 'ts-useful';
const locations = ThreeD([{ x: 0, y: 0, z: 0}, { x: 10, y: 10, z: 10}], .5);

Vector

Vector(coordinate?: coordinate);
Methods:
add(coordinate: coordinate)
subtract(coordinate: coordinate)
multiply(amount: number)
divide(amount: number)
normalize()
set(coordinate: coordinate)
zero()
Properties: hypotenuse: number, magnitude: number;

import {Vector} from 'ts-useful';
const vector = new Vector();
vector.add({ x: 50, y: 50 }).multiply(2);

Testing

Command to install dependencies, run tests, and clean up after itself.

npm run test