<div id="app">

  <section class="boxes">

    <div ref="purple" class="item purple gradient-purple" data-color="#9d95ff" data-class="purple"></div>

     <div ref="green" class="item green gradient-green" data-color="#0ae448" data-class="green"></div>

  </section>

​

  <div class="interface">    

      <button class="button" :class="{ playing : paused }" @click="togglePlayback">

        <svg aria-hidden="true" class="button__svg" fill="#fff" xmlns="http://www.w3.org/2000/svg" id="Layer_1" data-name="Layer 1" viewBox="0 0 24 24">

          <g class="pause">

            <path d="M10,17a1,1,0,0,1-1-1V8a1,1,0,0,1,2,0v8A1,1,0,0,1,10,17Z" />

            <path d="M14,17a1,1,0,0,1-1-1V8a1,1,0,0,1,2,0v8A1,1,0,0,1,14,17Z" />

          </g>

          <path class="play" d="M16.57,11.32,10.31,7.15a.8.8,0,0,0-1.25.68v8.34a.81.81,0,0,0,1.25.68l6.26-4.17A.81.81,0,0,0,16.57,11.32Z" />

        </svg>

        <span class="button__text">pause</span>

      </button>

    <div class="timeline" ref="timeline">

      <div class="timeline__item" v-for="(item,index) in timelineItems" :style="item.style" :class="item.class" :key="item.class">

        <span></span>

      </div>

    </div>

    <div class="times">

      <div v-for="(ms,index) in roundedMilliseconds" :class="{ label: index === labelPosition * 10 }" :key="index">

        <span>{{ index / 10 }}</span>    

      </div>

    </div>

    <div class="scrubber" ref="scrubber"></div>

  </div>

  <div class="code-container">

    <span class="code">tl.to(".green-box", { x: {{ endX }}, duration: 1 }<span :class="{ 'hide-comma' : hidePosition }">,&nbsp;</span></span>

    <span class="code position-text" :class="hidePosition ? 'hide-position' : ''">{{ formattedPosition }}</span>

    <span class="code">);</span>

  </div>

  <div class="code-container mobile">

    <div>tl.to(".green-box", {</div>

    <div>&nbsp;&nbsp;x: {{ endX }},</div>

    <div>&nbsp;&nbsp;duration: 1</div>

    <div>}<span :class="hidePosition ? 'hide-comma' : ''">,&nbsp;</span><span class="position-text" :class="{ 'hide-position' : hidePosition }">{{ formattedPosition }}</span>);</div>

  </div>

  <div class="options">

    <div class="options__container flow reference">

      <h3>Reference Point</h3>

​

        <label class="radio radio--simple">

          <input :class="{ 'checked': 'timelineStart' === referencePoint }" type="radio" value="timelineStart" v-model="referencePoint"><span class="box"></span><span class="info">Start of timeline</span>

        </label>

​

        <label class="radio radio--simple">

          <input :class="{ 'checked': 'timelineEnd' === referencePoint }" type="radio" value="timelineEnd" v-model="referencePoint"><span class="box"></span><span class="info">End of timeline</span>

        </label>

​

​

​

        <label class="radio">

          <input :class="{ 'checked': 'previousStart' === referencePoint }" type="radio" value="previousStart" v-model="referencePoint"><span class="box">&lt;</span><span class="info">Start of <span class="purpleTxt">previous animation</span></span>

        </label>

​

​

        <label class="radio">

          <input :class="{ 'checked': 'previousEnd' === referencePoint }" type="radio" value="previousEnd" v-model="referencePoint"> <span class="box">&gt;</span><span class="info">End of <span class="purpleTxt">previous animation</span></span>

        </label>

​

​

        <label class="radio">

          <input v-bind:class="{ 'checked': 'label' === referencePoint }" type="radio" value="label" v-model="referencePoint"> <span class="box box--label">myLabel</span><span class="info">Label</span>

        </label>

    </div>

    <div class="options__container offsets">

      <h3>Offset</h3>

      <div class="offset" :class="{ 'offset--previous': useRecent && usePrevious }">

      <input class="number" @wheel="" v-model="offsetNumber" type="number" :min="-range" :max="range" :step="offsetType === 'percent' ? 5 : 0.5">

      <label class="offset__type" :class="{ 'checked': 'seconds' === offsetType }">

        <input type="radio" value="seconds" v-model="offsetType"> Seconds

      </label>

      <label v-if="referencePoint !== 'timelineStart'" class="offset__type" :class="{ 'checked': 'percent' === offsetType }">

        <input type="radio" value="percent" v-model="offsetType" :disabled="referencePoint === 'timelineStart'"> Percent

      </label>  

      </div>

      <div v-if="usePrevious">

        <label class="radio radio--simple">

          <input type="checkbox" :class="{ 'checked': useRecent }"  v-model="useRecent"><span class="box"></span><span class="info">Use percentage of <span class="purpleTxt"> previous animation</span></span>

        </label>

      </div>

    </div>

  </div>

</div>

​

​

$mobile: 640px;

​

:root {

  --number-size: 1rem;

}

​

.item {

  width: 45px;

  height: 45px;

  border-radius: 10px;

  margin-top: 0.5rem

}

​

.gradient-green {

  background: var(--gradient-macha),

  url('https://assets.codepen.io/16327/noise-e82662fe.png'); /* Replace with the path to your noise texture image */

      background-blend-mode: color-dodge; /* Blend the noise texture with the gradient */

}

​

.gradient-purple {

  background: var(--gradient-purple-haze),

  url('https://assets.codepen.io/16327/noise.png'); /* Replace with the path to your noise texture image */

      background-blend-mode: color-dodge; /* Blend the noise texture with the gradient */

}

​

body {

  padding: 0.5rem;

  min-height: 100vh;

  box-sizing: border-box;

  display: flex;

  flex-direction: column;

  align-items: center;

  justify-content: center;

  font-size: 14px;

  letter-spacing: 1px;

  margin: 0;

}

​

h3 {

  margin-bottom: 0.5rem;

  color: #fffce1;

  font-weight: 400;

  font-size: 1rem;

}

​

#app {

  opacity: 0;

}

​

.flow > * + * {

  margin-top: 0.5rem;

}

​

.interface {

  // opacity:0;

  position: relative;

  padding: 2.2rem 2rem 2.2rem;

  background-color: #262626;

  border-radius: 10px;

  border-bottom-right-radius: 0;

  border-bottom-left-radius: 0;

  width: clamp(300px, 80vw, 900px);

​

  &__title {

    position: relative;

    color: #fffce1;

    display: block;

    width: 100%;

    padding-bottom: 1rem;

    padding-left: 3px;

    display: flex;

    flex-direction: row;

    h1 {

      font-size: 1.2rem;

    }

  }

}

​

.timeline > * + * {

  margin-top: 0.5rem;

}

​

.timeline__item {

  width: 2px;

  margin: 0.5rem;

  border-radius: 999px;

  box-sizing: border-box;

  text-align: center;

  height: 18px;

  display: flex;

  align-items: center;

  justify-content: center;

}

​

.timeline__item.purple span {

  display: none;

  font-size: 0.85rem

}

​

.scrubber {

  position: absolute;

  bottom: 2rem;

  left: 0;

  width: 20px;

  height: 20px;

  border-radius: 99px;

  background-color:#fffce1;

  z-index: 1;

}

​

.button__svg {

  width: 2rem;

  height: 2rem;

  margin-top: 0px;

  pointer-events: none;

}

​

.button {

  position: absolute;

  font-size: 0;

  border: none;

  outline: none;

  background-color: transparent;

  top: 10px;

  left: 1rem;

  cursor: pointer;

  display: block;

  padding: 0;

}

​

.button.playing {

  .pause {

    opacity: 1;

  }

  .play {

    opacity: 0;

  }

}

​

.button:not(.playing) {

  .pause {

    opacity: 0;

  }

  .play {

    opacity: 1;

  }

}

​

.times {

  width: calc(100% - 20px);

  display: flex;

  flex-direction: row;

  justify-content: space-between;

  z-index: 999;

  margin-left: 10px;

}

​

.times > * {

  position: relative;

}

​

.times div {

  margin-top: 1rem;

  width: 0.5px;

  height: 5px;

  background-color: #fffce1;

  opacity: 0.7;

  position: relative;

}

​

.times span {

  display: none;

  font-size: var(--number-size);

}

​

.times div:nth-child(5n + 1) {

  height: 10px;

  background-color: #fffce1;

  opacity: 1;

}

​

.times div:nth-child(5n + 1) span {

  display: block;

  color: #fffce1;

  text-align: center;

  position: absolute;

  width: auto;

  height: 1rem;

  top: 1rem;

  left: 50%;

  transform: translateX(-50%);

  z-index:2;

}

​

.times .label {

  height: 10px;

  background-color: #befd92;

}

​

.times .label span {

  position: absolute;

  width: 1rem;

  height: 1rem;

  top: 1rem;

  left: 0%;

  transform: translateX(-0.5rem);

  z-index:2;

}

​

.times .label:after {

  content: '';

  font-size: 0.85rem;

  text-align: center;

  position: absolute;

  background-size: 70%;

  background-position: center bottom;

  background-repeat: no-repeat;

  width: 60px;

  height: 30px;

  left: -30px;

  top: 400%;

  z-index: 9;

  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' id='Capa_1' x='0' y='0' version='1.1' viewBox='0 0 344.406 344.406' xml:space='preserve'%3E%3Cpath fill='%232191FB' d='M243.243 0h-142.08c-13.767.044-24.916 11.193-24.96 24.96v298.8c0 21 21.04 31.2 37.48 5l58.52-93.28 58.52 93.28c16.44 26.2 37.48 15.96 37.48-5V24.96C268.159 11.193 257.01.044 243.243 0z'/%3E%3C/svg%3E");

}

​

.boxes {

  display: flex;

  margin-bottom: 0.5rem;

  z-index: -1;

  pointer-events: none;

  flex-direction: column;

}

​

.emoji {

  margin: 1rem;

  width: 2rem;

  height: 2rem;

}

​

.heart {

  width: 3rem;

  height: 2.5rem;

  object-position: 85%;

}

​

#options {

  margin-top: 2.5rem;

  display: flex;

  align-items: center;

  justify-content: center;

  flex-direction: column;

  .input {

    margin-top: 2rem;

    font-size: 1.3rem;

    border: none;

    outline: none;

    padding: 1rem 0.5rem;

    border-bottom: solid 4px #51da85;

  }

}

​

.radios {

  display: flex;

}

​

.radio {

  display: flex;

  align-items: center;

}

​

.radio .box {

  width: 50px;

  background-color: #464646;

  border-radius: 5px;

  cursor: pointer;

  padding: 0.5rem;

  display: flex;

  align-items: center;

  justify-content: center;

  font-size: 0.75rem;

}

​

.radio .info {

  display: inline-block;

  margin-left:1rem;

}

​

​

.radio:nth-of-type(5) .checked ~ .box {

  border-color: #2191FB;

  background-color: #2191FB;

  color: #fff;

}

​

.checked ~ .box {

  border-color: #9d95ff;

  background-color: #9d95ff;

  color: #fffce1;

}

​

.radio input {

  position: absolute;

  opacity: 0;

}

​

.radio--simple .box {

  position: relative;

  width: 15px;

  height: 15px;

  padding: 0;

  border-radius: 99%;

  border-color: #ddd;

}

​

.radio--simple .box:after {

  position: absolute;

  content: '';

  width: 75%;

  height: 75%;

  top: 50%;

  left: 50%;

  transform: translate(-50%, -50%);

  border-radius: 99%;

  opacity: 0;

  background-color: #464646; 

}

​

.radio--simple .checked ~ .box {

  border-color: #51da85;

  background-color: #51da85;

}

.radio--simple .checked ~ .box:after {

  opacity: 1;

}

​

​

.offset {

  background-color: #464646;

  border-radius: 5px;

  cursor: pointer;

  display: flex;

  font-size: 1rem;

  display: inline-flex;

  overflow: hidden;

  input:not(.number) {

    opacity: 0;

    position: absolute;

  }

  .offset__type {

    flex-grow: 1;

    display: flex;

    align-items: center;

    padding: 0.25rem;

    font-size: 0.8rem;

  }

  .offset__type.checked {

    background-color: #0ae448;

    color: #1b1b1b;

  }

}

​

.offsets .radio--simple {

  margin-top: 1rem;

}

​

.offsets .radio--simple .checked ~ .box {

  background-color: #9d95ff;

}

​

.offset--previous {

  .offset__type.checked {

    background-color: #9d95ff;

  }

}

​

.offset--previous {

  border-color: #9d95ff;

}

​

.text {

  width: 100%;

}

.label {

  display: block;

  margin-top: 1rem;

}

​

.number {

  border: none;

  padding: 0.5rem 1rem;

  padding-right: 0.2rem;

  font-size: 1rem;

  border-radius: 20px;

  outline: none;

  background-color: #464646;

  color: #fff

}

​

​

.helperText {

  opacity: 0;

  min-height: 135px;

  text-align: center;

}

​

.greenTxt {

  color: #25b961;

  font-weight: bold;

}

.purpleTxt {

  color: #9d95ff;

  font-weight: bold;

}

.blueTxt {

  color: #2191FB;

  font-weight: bold;  

}

​

.invalid {

  height: 2rem;

  font-size: 0.85rem;

}

​

footer {

  display: flex;

}

​

.code {

  opacity: 0.6;

}

​

.position-text {

  opacity: 1;

  margin-bottom: 0.2em;

  padding-bottom: 0;

  font-weight: 600;

}

​

.code-container {

  font-family: "Fira Code", monospace;

  font-size: 0.9rem;

  padding:0.51rem;

  align-items: center;

  line-height: 2em;

  border-radius: 10px;

  padding-top: 2rem;

  border-top-left-radius: 0;

  border-top-right-radius: 0;

  background-color: #262626;

}

​

.code-container:not(.mobile) {

  display: flex;

  justify-content: center;

  white-space: pre;

}

​

.code-container.mobile {

  display: none;

}

​

.position-text {

  color: #fffce1

}

​

.code {

  white-space: pre;

}

​

.options {

  display: flex;

  flex-wrap: wrap;

  flex: 1 1 auto;

  padding-top: 2rem;

}

​

.options__container {

  flex: 0 0 50%;

  max-width: 50%;

}

​

.hide-comma {

  display: none;

}

​

.code-container .position-text.hide-position {

  margin-left: 0;

  display: none;

}

​

@media (max-width: $mobile) {

  .options__container {

    flex: 0 0 100%;

    max-width: 100%;

    padding-top: 1.5rem;

  }

  .code-container:not(.mobile) {

    display: none;

  }

​

  .code-container.mobile {

    display: block;

    padding-left: 2rem;

    padding-bottom: 1rem;

  }

}

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

console.clear();

​

// "<25%" (use recent), "<+=25%" (use inserting)

​

gsap.registerPlugin(Draggable, CustomEase, CustomWiggle);

​

CustomWiggle.create("wiggle", {wiggles:5, type:"easeInOut"});

​

new Vue({

  el: "#app",

  data() {

    return {

      labelPosition: 1,

      paused: false,

      roundedMilliseconds: 0,

      percentRange: 200,

      secondsRange: 5,

      useRecent: false,

      referencePoint: "timelineStart",

      offsetType: "seconds",

      offsetNumber: 1,

      position: 0,

      hidePosition: false,

      lastSecond: 1,

      lastPercent: 50,

      endX: 500,

      timelineItems: [],

      timelineData: [

        { class: "purple gradient-purple" }, 

        { class: "green gradient-green" }

      ]

    }

  },

  mounted() {

    this.setScrubber = gsap.quickSetter(this.$refs.scrubber, "x", "px");

    this.clampSeconds = gsap.utils.clamp(-this.secondsRange, this.secondsRange);

    this.clampPercent = gsap.utils.clamp(-this.percentRange, this.percentRange);

    this.mapSize = gsap.utils.mapRange(30, 90, 1.1, 0.65);

    this.timeline = gsap.timeline();    

    this.createScrubber();

    this.renderTimeline();

    window.addEventListener("resize", this.onResize);

    this.$nextTick(() => {

      this.onResize();

      this.timeline.eventCallback("onUpdate", this.updateScrubber);

      gsap.to("#app", { opacity: 1 });

    });    

  },

  computed: {

    formattedPosition() {

      if (this.hidePosition) {

        return "";

      }

      if (this.referencePoint !== "timelineStart") {

        return `"${this.position}"`;

      }

      return this.position;

    },

    range() {

      return this.offsetType === "percent" ? this.percentRange : this.secondsRange;

    },

    usePrevious() {

      return this.referencePoint.includes("previous") && this.offsetType === "percent";

    }

  },

  watch: {

    formattedPosition: "animatePosition",

    useRecent: "renderTimeline",

    referencePoint(value) {      

      if (value === "timelineStart") {

        this.offsetType = "seconds";

      }

      this.renderTimeline();

    },

    offsetNumber(value) {      

      value = parseFloat(value);      

      if (isNaN(value)) return;      

      if (this.offsetType === "percent") {

        this.offsetNumber = this.clampPercent(value);

      } else {

        this.offsetNumber = this.clampSeconds(value);

      }

      this.renderTimeline();

    },

    offsetType(value) {

      if (value === "percent") {

        this.lastSecond = this.offsetNumber;

        this.offsetNumber = this.lastPercent;

      } else {

        this.lastPercent = this.offsetNumber;

        this.offsetNumber = this.lastSecond;

      }

      this.renderTimeline();

    }

  },

  methods: {  

    renderTimeline() {

      this.position = this.getPosition();

      this.endX = this.scrubber.maxX - 56;

      let tl = this.timeline;

      tl.progress(0)

        .clear(true)            

        .addLabel("myLabel", this.labelPosition)      

        .to(this.$refs.purple, {

          ease: "none",

          duration: 2,

          x: this.endX,

          data: this.timelineData[0]

        }, 0)

        .to(this.$refs.green, {

          ease: "none",

          duration: 1,

          x: this.endX,

          data: this.timelineData[1]

        }, this.position);

      let timelineItems = [];

      let time = tl.duration();

      let children = tl.getChildren();

      let milliseconds = time * 10;

      this.roundedMilliseconds = Math.floor(milliseconds) + 1; 

      let fontSize = this.mapSize(this.roundedMilliseconds);

      document.documentElement.style.setProperty('--number-size', fontSize + "rem");

​

      children.forEach((child, index) => {

        let duration = child.totalDuration();

        let startTime = child.startTime();

        let width = (duration / time) * 100;

        let startPosition = (startTime / time) * 100;

        timelineItems[index] = {

          ...child.data,

          style: {

            width: `${width}%`,

            marginLeft: `${startPosition}%`

          }

        };

      });

      // trigger render

      this.timelineItems = timelineItems;

    },

    getPosition() {

      this.hidePosition = false;

      let value = parseFloat(this.offsetNumber);

      let isNegative = value < 0;      

      let isPercent = this.offsetType === "percent";

      if (this.referencePoint !== "timelineStart") {

        value = Math.abs(value);

      }

      let isZero = value === 0;

      let offset = isPercent ? `${value}%` : value;

      switch(this.referencePoint) {

        case "timelineStart": return value;

        case "timelineEnd": 

          if (isZero) {

            this.hidePosition = true;

            return "";

          }

          return (isNegative ? "-=" : "+=") + offset;

        case "previousStart":

          if (isZero) {

            return "<"; 

          }          

          if (isPercent && !this.useRecent) {

            return (isNegative ? "<-=" : "<+=") + offset;

          }

          return (isNegative ? "<-" : "<") + offset;

        case "previousEnd":

          if (isZero) {

            return ">"; 

          }

          if (isPercent && !this.useRecent) {

            return (isNegative ? ">-=" : ">+=") + offset;

          }

          return (isNegative ? ">-" : ">") + offset;

        case "label": 

          if (isZero) return "myLabel";

          return "myLabel" + (isNegative ? "-=" : "+=") + offset;

        default: return 0;

      }

    },

    createScrubber() {

      this.scrubber = new Draggable(this.$refs.scrubber, {

        type: "x",

        cursor: "pointer",

        bounds: this.$refs.timeline,

        zIndexBoost: false,

        onPress: () => {

          this.timeline.pause();

          this.paused = true;

        },

        onDrag: () => {

          let progress = this.normalize(this.scrubber.x);

          this.timeline.progress(progress);

        }

      });

    },    

    togglePlayback() {

      if (this.timeline.progress() > 0.98) {

        this.paused = false;

        return this.timeline.restart();

      }

      this.paused = !this.paused;

      this.timeline.paused(this.paused);

    },        

    onResize() {

      this.scrubber.update(true);

      this.normalize = gsap.utils.normalize(this.scrubber.minX, this.scrubber.maxX);

      this.interpolate = gsap.utils.interpolate(this.scrubber.minX, this.scrubber.maxX);

      this.updateScrubber();

      this.renderTimeline();

    },    

    updateScrubber() {

      let x = this.interpolate(this.timeline.progress());

      this.setScrubber(x);

    }

  }

});

​