0019.Hexo Fluid首页添加文章滑入动画

参考链接：
https://qingshaner.com/Hexo Fluid主题背景固定(ES6改写版)与毛玻璃底页/

新建source/js/scrollAnimation.js

const cards = document.querySelectorAll('.index-card')
if (cards.length) {
  document.querySelector('.row').setAttribute('style', 'overflow: hidden;')
  const coefficient = document.documentElement.clientWidth > 768 ? .5 : .3
  const origin = document.documentElement.clientHeight - cards[0].getBoundingClientRect().height * coefficient

  function throttle(fn, wait) {
    let timer = null;
    return function () {
      const context = this;
      const args = arguments;
      if (!timer) {
        timer = setTimeout(function () {
          fn.apply(context, args);
          timer = null;
        }, wait)
      }
    }
  }

  function handle() {
    cards.forEach(card => {
      card.setAttribute('style', `--state: ${(card.getBoundingClientRect().top - origin) < 0 ? 1 : 0};`)
    })
    console.log(1)
  }


  document.addEventListener("scroll", throttle(handle, 100));
}

新建source/css/scrollAnimation.css

.index-card {
  transition: all 0.5s;
  transform: scale(calc(1.5 - 0.5 * var(--state)));
  opacity: var(--state);
  margin-bottom: 2rem;
}

.index-img img {
  margin: 20px 0;
}

载入css与js

修改_config.fluid.yml

# 指定自定义 .js 文件路径，支持列表；路径是相对 source 目录，如 /js/custom.js 对应存放目录 source/js/custom.js
# Specify the path of your custom js file, support list. The path is relative to the source directory, such as `/js/custom.js` corresponding to the directory `source/js/custom.js`
custom_js: 
  - /js/scrollAnimation.js

# 指定自定义 .css 文件路径，用法和 custom_js 相同
# The usage is the same as custom_js
custom_css: 
  - /css/scrollAnimation.css