{"id":736,"date":"2022-11-17T13:00:00","date_gmt":"2022-11-17T04:00:00","guid":{"rendered":"https:\/\/baigie.me\/engineerblog\/?p=736"},"modified":"2025-05-07T21:14:47","modified_gmt":"2025-05-07T12:14:47","slug":"eco-scroll-linked-text-animation","status":"publish","type":"post","link":"https:\/\/baigie.me\/engineerblog\/eco-scroll-linked-text-animation\/","title":{"rendered":"\u7c21\u5358\u3067\u30d6\u30e9\u30a6\u30b6\u306b\u30a8\u30b3\u306a\u30b9\u30af\u30ed\u30fc\u30eb\u9023\u52d5\u578b\u30c6\u30ad\u30b9\u30c8\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3057\u3066\u307f\u305f"},"content":{"rendered":"\n<p>\u4eca\u56de\u306f\u3001\u30c6\u30a4\u30b9\u30c8\u3092\u5909\u3048\u3066\u69d8\u3005\u306a\u7b87\u6240\u3067\u3088\u304f\u4f7f\u3046\u300c\u4e00\u6587\u5b57\u305a\u3064\u767b\u5834\u3055\u305b\u308b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u300d\u306e\u57fa\u790e\u3092\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3068\u3068\u3082\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u307e\u305a\u3001\u5b8c\u6210\u7248\u306f\u3053\u3093\u306a\u611f\u3058\u3067\u3059\u3002\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"550\" data-default-tab=\"html,result\" data-slug-hash=\"gOzvyzY\" data-user=\"sakaccho\" style=\"height: 550px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n  <span>See the Pen <a href=\"https:\/\/codepen.io\/sakaccho\/pen\/gOzvyzY\">\n  1\u6587\u5b57\u305a\u3064\u767b\u5834\u3059\u308b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/a> by Takuro Sakai (<a href=\"https:\/\/codepen.io\/sakaccho\">@sakaccho<\/a>)\n  on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n<\/p>\n<script async=\"\" src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<p>\u203b\u89e3\u8aac\u306e\u305f\u3081\u306b<code>.js-observe-target<\/code>\u30922\u56de\u3082\u5909\u6570\u306b\u4ee3\u5165\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u9069\u5b9c\u5909\u66f4\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306e3\u3064\u306e\u30d1\u30fc\u30c8\u306b\u5206\u3051\u3001\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ol><li>JS\u3067\u4e00\u6587\u5b57\u305a\u3064\u30bf\u30b0\u3067\u62ec\u308b<\/li><li>SCSS\u3092\u66f8\u304f<\/li><li>JS\u3067\u300c\u8981\u7d20\u304c\u898b\u3048\u305f\u3089\u30af\u30e9\u30b9\u3092\u4ed8\u4e0e\u3059\u308b\u300d\u51e6\u7406\u3092\u66f8\u304f<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-baigie-block-heading\">1. JS\u3067\u4e00\u6587\u5b57\u305a\u3064&lt;span&gt;\u30bf\u30b0\u3067\u62ec\u308b<\/h2>\n\n\n\n<p>\u3053\u308c\u306fHTML\u306e\u6bb5\u968e\u3067\u624b\u66f8\u304d\u3067<code>&lt;span&gt;<\/code>\u30bf\u30b0\u3067\u4e00\u6587\u5b57\u305a\u3064\u62ec\u3063\u3066\u3057\u307e\u3063\u3066\u3082\u826f\u3044\u3067\u3059\u3002\u3068\u3044\u3046\u3088\u308a\u3001\u305d\u306e\u307b\u3046\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7684\u306b\u306f\u25cb\u3067\u3059\u3002\u300c\u52d5\u7684\u306b\u5909\u308f\u308b\u306e\u3067\u69cb\u9020\u4e0a\u96e3\u3057\u3044\u300d\u3068\u304b\u300c\u3044\u3061\u3044\u3061\u624b\u66f8\u304d\u3067\u306a\u3093\u304b\u3084\u3063\u3066\u3089\u3093\u306a\u3044\u3088\uff01\u300d\u3068\u3044\u3046\u65b9\u306f\u4ee5\u4e0b\u306eJS\u3067\u81ea\u52d5\u3067\u4e00\u6587\u5b57\u305a\u3064\u62ec\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;div class=\"text js-observe-target\"&gt;\u30c6\u30ad\u30b9\u30c8 1&lt;\/div&gt;<\/code><\/pre>\n\n\n\n<p>\u4e0a\u8a18\u306e\u3088\u3046\u306a\u8981\u7d20\u304c\u3042\u3063\u305f\u3068\u3057\u307e\u3059\u3002JS\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const text = document.querySelectorAll('.js-observe-target');\n\/\/ .text\u8981\u7d20\u306e\u6570\u3060\u3051\u30eb\u30fc\u30d7\u51e6\u7406\ntext.forEach(element =&gt; {\n  let html = '';\n  \n  const letters = element.textContent.split(''); \/\/ 1\u6587\u5b57\u305a\u3064\u5206\u89e3\u3057\u3066\u914d\u5217\u3078\n\n  \/\/ \u4e00\u6587\u5b57\u305a\u3064\u56de\u3057\u3066&lt;span&gt;\u30bf\u30b0\u3067\u62ec\u308b\u51e6\u7406\n  letters.forEach(letter =&gt; {\n    const str = letter.replace(\/\\s|&amp;nbsp;\/g, '&amp;nbsp;');\n    html += '&lt;span&gt;' + str + '&lt;\/span&gt;';\n  });\n  element.innerHTML = html; \/\/ .text\u8981\u7d20\u5185\u3092\u7f6e\u304d\u63db\u3048\u308b\n});<\/code><\/pre>\n\n\n\n<p>\u7c21\u5358\u306b\u51e6\u7406\u306e\u4e2d\u8eab\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol><li><code>.text<\/code>\u30af\u30e9\u30b9\u3092\u6301\u3063\u305f\u8981\u7d20\u3060\u3051\u30eb\u30fc\u30d7\u3057\u307e\u3059<\/li><li><code>split('')<\/code>\u3067\u4e00\u6587\u5b57\u305a\u3064\u5206\u89e3\u3057\u3066<code>letters<\/code>\u3068\u3044\u3046\u914d\u5217\u306b\u5165\u308c\u307e\u3059<\/li><li><code>letters = ['\u30c6', '\u30ad', '\u30b9', '\u30c8', ' ', '1']<\/code>\u3068\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3053\u308c\u3092\u30eb\u30fc\u30d7\u3057\u307e\u3059<\/li><li>\u30eb\u30fc\u30d7\u306e\u4e2d\u3067\u5f53\u8a72\u6587\u5b57\u304c\u534a\u30b9\u30da\u306e\u5834\u5408\u306f\u975e\u8868\u793a\u306b\u306a\u3063\u3066\u3057\u307e\u308f\u306c\u3088\u3046\u306b<code>&amp;nbsp;<\/code>\u306b\u7f6e\u63db\u3057\u307e\u3059<\/li><li><code>&lt;span&gt;\u30c6&lt;\/span&gt;<\/code>\u3068\u306a\u308b\u3088\u3046\u306b\u3057\u3066html\u3068\u3044\u3046\u5909\u6570\u306b\u8db3\u3057\u3066\u3044\u304d\u307e\u3059<\/li><li>\u6700\u5f8c\u306b<code>innerHTML<\/code>\u3067<code>.text<\/code>\u8981\u7d20\u306b\u8fd4\u3057\u307e\u3059<\/li><\/ol>\n\n\n\n<p>\u3053\u308c\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30c6\u30ad\u30b9\u30c8\u304c\u5206\u89e3\u3055\u308c\u305f\u306f\u305a\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;div class=\"text js-observe-target\"&gt;\n  &lt;span&gt;\u30c6&lt;\/span&gt;\n  &lt;span&gt;\u30ad&lt;\/span&gt;\n  &lt;span&gt;\u30b9&lt;\/span&gt;\n  &lt;span&gt;\u30c8&lt;\/span&gt;\n  &lt;span&gt;&amp;nbsp;&lt;\/span&gt;\n  &lt;span&gt;1&lt;\/span&gt;\n&lt;\/div&gt;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-baigie-block-heading\">2. SCSS\u3092\u66f8\u304f<\/h2>\n\n\n\n<p>HTML\u306e\u6e96\u5099\u304c\u3067\u304d\u305f\u3068\u3053\u308d\u3067\u30b9\u30bf\u30a4\u30eb\u3092\u3042\u3066\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u4eca\u56de\u306fSCSS\u3092\u4f7f\u3044\u307e\u3059\u3002\u3056\u3063\u3068\u4ee5\u4e0b\u306e\u30b9\u30bf\u30a4\u30eb\u5b9f\u88c5\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul>\n<li>\u6587\u5b57\u304c\u30b9\u30ef\u30a4\u30d7\u3067\u767b\u5834\u3059\u308b\u30e2\u30fc\u30b7\u30e7\u30f3\u3092\u3064\u3051\u308b<\/li>\n\n\n\n<li><code>&lt;span&gt;<\/code>\u3054\u3068\u306b\u9045\u5ef6\u3055\u305b\u308b<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-baigie-block-heading\">\u6587\u5b57\u304c\u30b9\u30ef\u30a4\u30d7\u3067\u767b\u5834\u3059\u308b\u30e2\u30fc\u30b7\u30e7\u30f3\u3092\u3064\u3051\u308b<\/h3>\n\n\n\n<p>\u307e\u305a\u306f\u6587\u5b57\u304c\u300c\u898b\u3048\u306a\u3044\u72b6\u614b\u300d\u3092\u4f5c\u308a\u307e\u3059\u3002\u4eca\u56de\u306f<code>clip-path<\/code>\u30d7\u30ed\u30d1\u30c6\u30a3\u306e<code>inset(X)<\/code>\u3092\u7528\u3044\u307e\u3059\u3002\u3053\u308c\u306f<code>clip-path: inset(\u4e0a\u8fba \u53f3\u8fba \u4e0b\u8fba \u5de6\u8fba);<\/code>\u3068\u3044\u3046\u3088\u3046\u306b\u5404\u8fba\u304b\u3089%\u3067\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u8868\u793a\u9818\u57df\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3067\u304d\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"616\" src=\"https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/clip-path-1024x616.png\" alt=\"\" class=\"wp-image-903\" srcset=\"https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/clip-path-1024x616.png 1024w, https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/clip-path-300x180.png 300w, https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/clip-path-768x462.png 768w, https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/clip-path.png 1440w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">clip-path\u306einset()\u306e\u4ed5\u7d44\u307f<\/figcaption><\/figure>\n\n\n\n<p>\u4e0a\u306e\u56f3\u3092\u307f\u3066\u3082\u3089\u3046\u3068\u308f\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u304c\u3001<code>inset(0 0 0 0)<\/code>\u3068\u3059\u308b\u3068\u56db\u89d2\u5f62\u306e\u5168\u57df\u304c\u8868\u793a\u3055\u308c\u3001<code>inset(0 0 50% 0)<\/code>\u3068\u3059\u308b\u3068\u4e0b\u8fba\u304b\u308950%\u306e\u4f4d\u7f6e\u307e\u3067\u8868\u793a\u9818\u57df\u304c\u72ed\u3081\u3089\u308c\u305f\u72b6\u614b\u306b\u306a\u308a\u307e\u3059\u3002\u3064\u307e\u308a<code>inset(0 0 100% 0)<\/code>\u3068\u3059\u308c\u3070\u8868\u793a\u9818\u57df\u306f\u898b\u3048\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u3053\u308c\u306f\u3042\u304f\u307e\u3067\u8868\u793a\u9818\u57df\u306e\u8a2d\u5b9a\u306a\u306e\u3067\u5185\u90e8\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u6f70\u308c\u305f\u308a\u3059\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u3053\u3053\u3067\u306f<code>&lt;span&gt;<\/code>\u30bf\u30b0\u3054\u3068\u306b<code>inset(0 0 100% 0)<\/code>\u306b\u3057\u3066\u6587\u5b57\u304c\u898b\u3048\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.text {\n  span {\n    clip-path: inset(0 0 100% 0);\n  }\n}<\/code><\/pre>\n\n\n\n<p>\u3055\u3066\u3001\u3053\u306e<code>clip-path<\/code>\u306f<code>transition<\/code>\u304c\u304b\u3051\u3089\u308c\u308b\u306e\u3067\u3001\u3053\u308c\u3092\u5229\u7528\u3057\u3066\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002\u4eca\u56de\u306f1\u6587\u5b57\u305a\u3064\u5c11\u3057\u3060\u3051\u767b\u5834\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u9045\u5ef6\u3055\u305b\u305f\u3044\u306e\u3067\u3001\u30eb\u30fc\u30d7\u3092\u4f7f\u3063\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306b1\u6587\u5b57\u3054\u3068\u306b0.06\u79d2\u9045\u5ef6\u3059\u308b<code>transition-delay<\/code>\u3082\u3064\u3051\u307e\u3059\u3002\u307e\u305f\u3001<code>.text<\/code>\u306b<code>-visible<\/code>\u3068\u3044\u3046\u30af\u30e9\u30b9\u304c\u4ed8\u4e0e\u3055\u308c\u305f\u3089\u6587\u5b57\u304c\u73fe\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.text {\n  span {\n    clip-path: inset(0 0 100% 0);\n    transition: all cubic-bezier(0.215, 0.61, 0.355, 1) 1.0s\n\n    @for $i from 1 through 6 {\n      &amp;:nth-child(#{$i}) {\n        $delay: $i * 0.06 + s;\n        transition-delay: $delay;\n      }\n    }\n  }\n  &amp;.-visible {\n    span {\n      clip-path: inset(0 0 0 0);\n    }\n  }\n}<\/code><\/pre>\n\n\n\n<p>\u7e70\u308a\u8fd4\u3057\u90e8\u5206\u306f\u3001\u5b9f\u969b\u306eCSS\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.text span:nth-child(1) {\n  transition-delay: .06s\n}\n\n.text span:nth-child(2) {\n  transition-delay: .12s\n}\n\n.text span:nth-child(3) {\n  transition-delay: .18s\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-baigie-block-heading\">3. JS\u3067\u300c\u8981\u7d20\u304c\u898b\u3048\u305f\u3089\u30af\u30e9\u30b9\u3092\u4ed8\u4e0e\u3059\u308b\u300d\u51e6\u7406\u3092\u66f8\u304f<\/h2>\n\n\n\n<p>\u300c\u30b9\u30af\u30ed\u30fc\u30eb\u30a4\u30d9\u30f3\u30c8\u3067\u30b9\u30af\u30ed\u30fc\u30eb\u91cf\u3092\u53d6\u5f97\u3057\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3055\u305b\u305f\u3044\u8981\u7d20\u306e\u4f4d\u7f6e\u304b\u3089\u8a08\u7b97\u3057\u3066\u30af\u30e9\u30b9\u3092\u4ed8\u4e0e\u3059\u308b\u300d\u3068\u3044\u3046\u5b9f\u88c5\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\u304c\u4eca\u56de\u306f\u4ea4\u5dee\u30aa\u30d6\u30b6\u30fc\u30d0\u30fcAPI\uff08Intersection Observer API\uff09\u3092\u7528\u3044\u3066\u5b9f\u88c5\u3057\u307e\u3059\u3002\u3053\u3061\u3089\u306e\u307b\u3046\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3082\u826f\u3044\u3068\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4ea4\u5dee\u30aa\u30d6\u30b6\u30fc\u30d0\u30fcAPI\u3067\u3059\u304c\u3001\u305d\u306e\u540d\u306e\u901a\u308a\u30d6\u30e9\u30a6\u30b6\u3067\u898b\u3048\u3066\u3044\u308b\u9818\u57df\u3068\u30bf\u30fc\u30b2\u30c3\u30c8\u8981\u7d20\u304c\u4ea4\u5dee\u3057\u305f\u3089\u3001\u3064\u307e\u308a\u8981\u7d20\u304c\u898b\u3048\u305f\u3089\u4f55\u304b\u3057\u3089\u306e\u51e6\u7406\u3092\u884c\u3046\u3001\u3068\u3044\u3063\u305f\u3053\u3068\u304c\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u4eca\u56de\u5b9f\u73fe\u3057\u305f\u3044\u51e6\u7406\u306b\u5fc5\u8981\u306a\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const setObserver = () =&gt; {\n  \/\/ \u2463\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u5ea6\u306b\u5b9f\u884c\u3055\u308c\u308b\u95a2\u6570\n  const intersectionCallback = (entries) =&gt; {\n    entries.forEach( (entry) =&gt; {\n      if (entry.isIntersecting) {\n        \/\/ entry.target\u304c\u9818\u57df\u306b\u5165\u3063\u305f\u3089\uff08\uff1d\u898b\u3048\u305f\u3089\uff09\u7279\u5b9a\u306e\u51e6\u7406\u3092\u5b9f\u884c\n        entry.target.classList.add('-visible');\n      }\n    });\n  }\n\n  \/\/ \u2460\u4ea4\u5dee\u5224\u5b9a\u3068\u306a\u308b\u30dc\u30fc\u30c0\u30fc\u306e\u8a2d\u5b9a\uff06\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\n  const options = {\n    rootMargin: '0px 0px -200px 0px',\n  }\n  const observer = new IntersectionObserver(intersectionCallback, options);\n\n  \/\/ \u2461\u76e3\u8996\u5bfe\u8c61\u3068\u306a\u308b\u8981\u7d20\n  const targets = document.querySelectorAll('.js-observe-target');\n\n  \/\/ \u2462\u300c\u2461\u300d\u306e\u8981\u7d20\u3092\u76e3\u8996\u5bfe\u8c61\u3068\u3057\u3066\u767b\u9332\n  targets.forEach( (target) =&gt; {\n    observer.observe(target);\n  });\n}\n\nsetObserver();<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-baigie-block-heading\">\u2460\u4ea4\u5dee\u5224\u5b9a\u3068\u306a\u308b\u30dc\u30fc\u30c0\u30fc\u306e\u8a2d\u5b9a\uff06\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210<\/h4>\n\n\n\n<p>\u3053\u3053\u3067\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u30aa\u30d7\u30b7\u30e7\u30f3\u306e<code>rootMargin<\/code>\u3068\u3044\u3046\u8003\u3048\u65b9\u304c\u5c11\u3057\u7656\u3042\u308a\u3067\u3059\u3002\u3053\u308c\u307e\u3067\u306e<code>scrollTop<\/code>\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u3060\u3068\u30d6\u30e9\u30a6\u30b6\u30d3\u30e5\u30fc\u306e\u4e0a\u8fba\u304b\u3001\u30d6\u30e9\u30a6\u30b6\u9ad8\u3055\u3092\u8db3\u3057\u305f\u308a\u3057\u3066\u4e0b\u8fba\u304c\u8981\u7d20\u3092\u901a\u904e\u3057\u305f\u3089\u30fb\u30fb\u30fb\u306e\u3088\u3046\u306a\u51e6\u7406\u3092\u3088\u304f\u4f5c\u3063\u3066\u3044\u307e\u3057\u305f\u304c\u3001<code>rootMargin<\/code>\u306f\u30d6\u30e9\u30a6\u30b6\u30d3\u30e5\u30fc\u306e\u4e0a\u4e0b\u5de6\u53f34\u8fba\u304b\u3089\u306e\u8ddd\u96e2\u3092\u6307\u5b9a\u3057\u3066\u5883\u754c\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"616\" src=\"https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/rootMargin1-1024x616.png\" alt=\"\" class=\"wp-image-910\" srcset=\"https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/rootMargin1-1024x616.png 1024w, https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/rootMargin1-300x180.png 300w, https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/rootMargin1-768x462.png 768w, https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/rootMargin1.png 1440w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">rootMargin\u306e\u4ed5\u7d44\u307f<\/figcaption><\/figure>\n\n\n\n<p><code>rootMargin: '\u4e0a \u53f3 \u4e0b \u5de6'<\/code>\u3068\u3044\u3046\u98a8\u306b\u8a2d\u5b9a\u3059\u308b\u306e\u3067\u3001\u4e0a\u8a18\u306e<code>rootMargin: '0px 0px -200px 0px'<\/code>\u306f\u300c\u4e0b\u8fba\u304b\u3089200px\u306e\u4f4d\u7f6e\u300d\u3092\u5883\u754c\u7dda\u306b\u3059\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u306d\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-baigie-block-heading\">\u2461\u76e3\u8996\u5bfe\u8c61\u3068\u306a\u308b\u8981\u7d20<\/h4>\n\n\n\n<p>\u5883\u754c\u7dda\u306b\u4ea4\u5dee\u3057\u305f\u304b\u3092\u76e3\u8996\u3057\u305f\u3044\u8981\u7d20\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u3075\u3064\u3046\u306b<code>querySelectorAll<\/code>\u3067\u53d6\u5f97\u3057\u3068\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-baigie-block-heading\">\u2462\u300c\u2461\u300d\u306e\u8981\u7d20\u3092\u76e3\u8996\u5bfe\u8c61\u3068\u3057\u3066\u767b\u9332<\/h4>\n\n\n\n<p>\u2461\u3067\u53d6\u5f97\u3057\u305f\u8981\u7d20\u304c\u8907\u6570\u306a\u306e\u3067\u3001forEach\u3067\u307e\u308f\u3057\u3066\u5404\u8981\u7d20\u3092\u76e3\u8996\u3059\u308b\u3088\u3046\u306b\u767b\u9332\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-baigie-block-heading\">\u2463\u30b9\u30af\u30ed\u30fc\u30eb\u306e\u5ea6\u306b\u5b9f\u884c\u3055\u308c\u308b\u95a2\u6570<\/h4>\n\n\n\n<p>\u3042\u3068\u306f\u4ea4\u5dee\u3057\u305f\u8981\u7d20\u3060\u3051<code>entry.isIntersecting = true<\/code>\u3068\u306a\u308b\u306e\u3067\u3001\u4ea4\u5dee\u3057\u305f\u3068\u304d\u306b\u884c\u3044\u305f\u3044\u51e6\u7406\u3092\u3053\u3053\u306b\u66f8\u3044\u3066\u304a\u304d\u307e\u3059\u3002\u4eca\u56de\u306f\u4ea4\u5dee\u3057\u305f\u8981\u7d20\u306b<code>-visible<\/code>\u30af\u30e9\u30b9\u3092\u4ed8\u4e0e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"616\" src=\"https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/rootMargin2-1024x616.png\" alt=\"\" class=\"wp-image-911\" srcset=\"https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/rootMargin2-1024x616.png 1024w, https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/rootMargin2-300x180.png 300w, https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/rootMargin2-768x462.png 768w, https:\/\/baigie.me\/engineerblog\/wp-content\/uploads\/2022\/11\/rootMargin2.png 1440w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">rootMargin\u3067\u8a2d\u5b9a\u3057\u305f\u7bc4\u56f2\u3068\u4ea4\u5dee\u3059\u308b\u3068entry.isIntersecting = true\u3068\u306a\u308b<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-baigie-block-heading\">\u304a\u308f\u308a\u306b<\/h2>\n\n\n\n<p>\u53ef\u8996\u306e\u5224\u5b9a\u51e6\u7406\u306f\u57fa\u672c\u7684\u306b\u4eca\u56de\u7d39\u4ecb\u3057\u305fIntersection Observer\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3082\u3088\u304f\u3001\u5b9f\u88c5\u3082\u697d\u306a\u306e\u3067\u3088\u3044\u306e\u304b\u306a\u3068\u601d\u3044\u307e\u3059\u3002\u3042\u3068\u306f\u30a4\u30fc\u30b8\u30f3\u30b0\u5909\u3048\u305f\u308a\u3001\u6642\u9593\u3092\u3044\u3058\u3063\u3066\u30c6\u30a4\u30b9\u30c8\u3092\u5909\u66f4\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4eca\u56de\u306f\u3001\u30c6\u30a4\u30b9\u30c8\u3092\u5909\u3048\u3066\u69d8\u3005\u306a\u7b87\u6240\u3067\u3088\u304f\u4f7f\u3046\u300c\u4e00\u6587\u5b57\u305a\u3064\u767b\u5834\u3055\u305b\u308b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u300d\u306e\u57fa\u790e\u3092\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3068\u3068\u3082\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u307e\u305a\u3001\u5b8c\u6210\u7248\u306f\u3053\u3093\u306a\u611f\u3058\u3067\u3059\u3002\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01 See the Pen [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[12],"_links":{"self":[{"href":"https:\/\/baigie.me\/engineerblog\/wp-json\/wp\/v2\/posts\/736"}],"collection":[{"href":"https:\/\/baigie.me\/engineerblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/baigie.me\/engineerblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/baigie.me\/engineerblog\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/baigie.me\/engineerblog\/wp-json\/wp\/v2\/comments?post=736"}],"version-history":[{"count":25,"href":"https:\/\/baigie.me\/engineerblog\/wp-json\/wp\/v2\/posts\/736\/revisions"}],"predecessor-version":[{"id":1339,"href":"https:\/\/baigie.me\/engineerblog\/wp-json\/wp\/v2\/posts\/736\/revisions\/1339"}],"wp:attachment":[{"href":"https:\/\/baigie.me\/engineerblog\/wp-json\/wp\/v2\/media?parent=736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/baigie.me\/engineerblog\/wp-json\/wp\/v2\/categories?post=736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}