// call this method before initializing tsParticles, this shape will be available in all of your tsParticles instances
// parameters: shape name, drawing method
// opacity is just for shapes that needs a differenc opacity handling like images
tsParticles.addShape("spiral", function(context, particle, radius, opacity) {
  const shapeData = particle.shapeData;
  const realWidth = (radius - shapeData.innerRadius) / shapeData.lineSpacing;

  for (let i = 0; i < realWidth * 10; i++) {
    const angle = 0.1 * i;
    const x =
      (shapeData.innerRadius + shapeData.lineSpacing * angle) * Math.cos(angle);
    const y =
      (shapeData.innerRadius + shapeData.lineSpacing * angle) * Math.sin(angle);

    context.lineTo(x, y);
  }
});

class SpiralDrawer {
  draw(context, particle, radius, opacity) {
    const shapeData = particle.shapeData;
    const realWidth = (radius - shapeData.innerRadius) / shapeData.lineSpacing;

    for (let i = 0; i < realWidth * 10; i++) {
      const angle = 0.1 * i;
      const x =
        (shapeData.innerRadius + shapeData.lineSpacing * angle) *
        Math.cos(angle);
      const y =
        (shapeData.innerRadius + shapeData.lineSpacing * angle) *
        Math.sin(angle);

      context.lineTo(x, y);
    }
  }
}

// call this method before initializing tsParticles, this shape will be available in all of your tsParticles instances
// parameters: shape name, drawer class
tsParticles.addShape("spiral", new SpiralDrawer());

{
  // [... omitted for brevity]
  "particles": {
    // [... omitted for brevity]
    "shape": {
      "type": "spiral", // this must match the name above, the type works as always, you can use an array with your custom shape inside
      "custom": {
        // this must match the name above, these are the values set in particle.shapeData (the first line of the method above)
        // you can use array as value here too, the values will be random picked, like in standard shapes
        "spiral": {
          "innerRadius": 1,
          "lineSpacing": 1,
          "close": false, // this value is used by tsParticles to close the path, if you don't want to close it set this value to false
          "fill": false // this value is used by tsParticles to fill the shape with the particles color, if you want only the stroke set this value to false
        }
      }
      // [... omitted for brevity]
    }
    // [... omitted for brevity]
  }
  // [... omitted for brevity]
}

// call this method before initializing tsParticles, this preset will be available in all of your tsParticles instances
// parameters: preset name, preset partial options
tsParticles.addPreset("fire", {
  fpsLimit: 40,
  particles: {
    number: {
      value: 80,
      density: {
        enable: true,
        value_area: 800
      }
    },
    color: {
      value: ["#fdcf58", "#757676", "#f27d0c", "#800909", "#f07f13"]
    },
    opacity: {
      value: 0.5,
      random: true
    },
    size: {
      value: 3,
      random: true
    },
    move: {
      enable: true,
      speed: 6,
      random: false
    }
  },
  interactivity: {
    events: {
      onclick: {
        enable: true,
        mode: "push"
      },
      resize: true
    }
  },
  background: {
    image: "radial-gradient(#4a0000, #000)"
  }
});

{
  "preset": "fire" // this should match the name above, it can be used in array values too, it will be loaded in order like everyone else
}

const tsParticles = require('tsparticles');

// or

import { tsParticles } from 'tsparticles';

// @path-json can be an object or an array, the first will be loaded directly, the object from the array will be random selected
/* tsParticles.loadJSON(@dom-id, @path-json, @callback (optional)); */
tsParticles
  .loadJSON("tsparticles", "presets/default.json")
  .then(container => {
    console.log("callback - tsparticles config loaded");
  })
  .catch(error => {
    console.error(error);
  });

//or

/* tsParticles.load(@dom-id, @options); */
tsParticles.load("tsparticles", {
  /* options here */
});

//or

/* tsParticles.loadFromArray(@dom-id, @options, @index (optional)); */
tsParticles.loadFromArray("tsparticles", [
  {
    /* options here */
  },
  {
    /* other options here */
  }
]); //random object
tsParticles.loadFromArray(
  "tsparticles",
  [
    {
      /* options here */
    },
    {
      /* other options here */
    }
  ],
  1
); //the second one
// Important! If the index is not in range 0...array.length, the index will be ignored.

// after initialization this can be used.

/* tsParticles.setOnClickHandler(@callback); */
/* this will be fired from all particles loaded */
tsParticles.setOnClickHandler(e => {
  /* custom on click handler */
});

// now you can control the animations too, it's possible to pause and resume the animations
// these methods don't change the config so you're safe with all your configurations
// domItem(0) returns the first tsParticles instance loaded in the dom
const particles = tsParticles.domItem(0);
// play will start the animations, if the move is not enabled it won't enable it, it just updates the frame
particles.play();
// pause will stop the animations
particles.pause();