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    position: fixed;
    left: 50%;
    top: 50%;
		z-index: 100;
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<script>
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    let contentBox = document.querySelector(".notion-table_of_contents-block");
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    if (contentBox.parentElement !== ele) {
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      content.childNodes[indexContext()].style.color = "red";
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    let observer = new IntersectionObserver(callback, {
      threshold: [1] // If 50% of the element is in the screen, can count it
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    headers.forEach(d => {
        observer.observe(d);
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  async function addRecentPostBlock() {
    async function fetchData() {
      const response = await fetch("https://heyinsa.kr/posts",
      {
        method: 'GET',
      });

      const result = await response.text();
      const result_json = JSON.parse(result);
			return result_json;
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		const posts = await fetchData();
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    for (var i = 0 ; i < posts.length ; ++i) {
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      const cover = "https://cdn.pixabay.com/photo/2016/03/20/19/22/towards-the-garden-1269304_1280.jpg";
      const url = 'https://80000coding.oopy.io/' + posts[i].id;
      var aElement = document.createElement('a');

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      titleAuthorElement.innerHTML = "by " + author;

      titleElement.append(titleTitleElement);
      titleElement.append(titleAuthorElement);

      var contentElement = document.createElement('div');
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      contentElement.style.backgroundImage = "url(\'" + cover + "\')";

      aElement.classList.add('postblock-box');
      aElement.href = url;
      aElement.append(contentElement);
      aElement.append(titleElement);

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    var dividerElement = document.createElement('span');
    dividerElement.classList.add('postblock-divider');
    dividerElement.classList.add('theme-text');
    dividerElement.innerHTML = "최근 게시글";

    addPos.append(dividerElement);
    addPos.append(divElement);
  } // end of addRecentPostBlock
    
  function addCommentBlock() {
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		var script = document.createElement('script');
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      "src": "https://utteranc.es/client.js",
      "repo": "rkskekzzz/80000coding_comment",
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      "label": "comment",
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      "crossorigin": "anonymous",
      "async": "async"
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  async function addHeartButton() {
    class Heart extends mojs.CustomShape {
      getShape() {
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      }
      getLength() {
        return 292.110107421875;
      } // optional
    }

    mojs.addShape('heart', Heart); // passing name and Bubble class

    const COLORS = {
      purple: '#8A5CE6',
      blue: '#42AFE3',
      yellow: '#FADD4A',
      red: '#FF6680',
    };

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          delayStep = duration / 3,
          yShift = 10,
          endAngle = 30;

    let delay = 0;

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      parent: document.querySelector("#page-center"),
      shape: 'heart',
      scale: { 0: 1 },
      angle: { [-90]: endAngle, easing: 'cubic.out' },
      y: { 0: -yShift },
      easing: 'sin.out',
      radius: 43,
      duration,
    };

    // bubble then options
    const THEN_OPTS = {
      y: 50,
      angle: { to: -45, easing: 'cubic.in' },
      scale: { to: 0, easing: 'quad.in' },
      easing: 'sin.in',
    };

    // blue logo then options
    const LOGO_THEN_OPTS = {
      scale: 0,
      delay: 1000,
    };

    const purpleBubble = new mojs.Shape({
      ...OPTS,
      fill: COLORS.purple,
      origin: '100% 100%',
    }).then({
      ...THEN_OPTS,
    });

    const redBubble = new mojs.Shape({
      ...OPTS,
      shape: 'heart',
      fill: COLORS.red,
      origin: '0% 100%',
      delay: (delay += delayStep),
      x: 10,
      y: { [-55]: -55 - yShift },
      angle: { 40: -endAngle },
    }).then({
      ...THEN_OPTS,
      angle: { to: 90, easing: 'expo.in' },
    });

    const yellowBubble = new mojs.Shape({
      ...OPTS,
      fill: COLORS.yellow,
      origin: '100% 100%',
      delay: (delay += delayStep),
      y: { [-85]: -85 - yShift },
      x: 15,
      angle: { [-30]: endAngle },
    }).then({
      ...THEN_OPTS,
      duration: 300,
      y: 15,
    });

    const blueCircle = new mojs.Shape({
      parent: document.querySelector("#page-center"),
      shape: 'circle',
      fill: COLORS.blue,
      radius: 10,
      scale: { 0: 1 },
      x: { [-25]: -55 },
      y: { 0: -70 },
      delay: duration / 2 + 50,
      duration: 1 * duration,
      easing: 'quad.out',
    }).then({
      x: -20,
      y: 0,
      delay: 50,
      scale: { to: 0.65, easing: 'quad.in' },
      duration: duration / 1.75,
      easing: 'cubic.in',
      isShowEnd: false,
    });

    const check = new mojs.Shape({
      parent: document.querySelector("#page-center"),
      shape: 'heart',
      stroke: COLORS.red,
      fill: 'none',
      strokeWidth: 10,
      x: 1,
      y: 2,
      strokeLinecap: 'round',
      strokeDasharray: '100%',
      strokeDashoffset: { '100%': 0 },
      delay: 2.5 * duration - 50,
      duration: 2.5 * duration,
      easing: 'quad.out',
    }).then({
      scale: 0,
      duration: 1.35 * duration,
      delay: 450,
      angle: 360,
      easing: 'cubic.in',
    });

    const data = { host : window.location.href };
    const response = await fetch("https://heyinsa.kr/heart" , {
      method: 'POST',
      headers: {'Content-Type': 'application/json'},
      body: JSON.stringify(data)
    });
    const result = await response.text();
    const result_json = JSON.parse(result);
    const buttonPos = document.querySelector(".top-button");
    const floatIconBorder = document.createElement('div');
    floatIconBorder.classList.add('floatIconBorder');
    console.log(result_json);
    const floatIcon = document.createElement('div');
    function eventHandlerFactory(obj) {
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          floatIcon.classList.remove('liked')
          data['value'] = 0 + obj.number
        } else {
          const timeline = new mojs.Timeline({ delay: 0 })
          timeline.add(purpleBubble, redBubble, yellowBubble, blueCircle, check).play()
          floatIcon.classList.add('liked')
          data['value'] = 0 + obj.number + 1
        }
        await fetch('https://heyinsa.kr/heart', {
          method: 'PATCH',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify(data),
        })
      }
    }
    floatIcon.classList.add('flaticon');
  	floatIcon.addEventListener('click', eventHandlerFactory(result_json))
    buttonPos.parentNode.append(floatIconBorder);
   	buttonPos.parentNode.append(floatIcon);
  }
  window.onload = function () {
    if (window.location.href !== 'https://80000coding.oopy.io/') {
      addCommentBlock()
      addRecentPostBlock() // 댓글 -> 최신게시글 순서 중요!!
      addHeartButton()
    }
  }
</script>


80000coding.oopy.io

4. icons