Question

我一直在寻找我想要在google中找到的示例，然后在CodePen中找到了一个示例，然后尝试将html，css和javascript代码传递到我的项目中，然后在我的项目中不起作用。我也在BlazorFiddle中尝试过，结果相同，没有任何效果。我真的不知道是什么原因造成的。

（我将通过CodePen中的代码进行传递，以实现更好的可视化效果）

HTML代码：

<script src="https://unpkg.com/animate-css-grid@1.4.0/dist/main.js" > </script>

<div class="p-4">
  <div class="mb-4">
    <p>this pen uses <a target="__blank" href="https://github.com/aholachek/animate-css-grid">animate-css-grid</a>
    </p>
    <p>
      If you use React, you might want to try out <a href="https://github.com/aholachek/react-flip-toolkit" target="__blank">react-flip-toolkit</a>
    </p>
    <button class="btn js-toggle-grid-gap">toggle <code>grid-gap</code></button>
    <button class="btn js-toggle-grid-columns">toggle <code>grid-template-columns</code></button>

    <p>click a card to toggle the <code>grid-column</code> and <code>grid-row </code>properties on the card</p>
  </div>

  <div class="grid grid--full mb-4">
    <div class="card">
          <div>
            <img src="https://1h4hfe10xz8m3g3xkh2wb9lc-wpengine.netdna-ssl.com/blog/files/2015/08/thestocks-imagem.jpg" class="card__img"/>
          </div>
        </div>
    <div class="card">
          <div>
            <img src="https://1h4hfe10xz8m3g3xkh2wb9lc-wpengine.netdna-ssl.com/blog/files/2015/08/thestocks-imagem.jpg" class="card__img"/>
          </div>
        </div><div class="card">
          <div>
            <img src="https://1h4hfe10xz8m3g3xkh2wb9lc-wpengine.netdna-ssl.com/blog/files/2015/08/thestocks-imagem.jpg" class="card__img"/>
          </div>
        </div>
    <div class="card">
          <div>
            <img src="https://1h4hfe10xz8m3g3xkh2wb9lc-wpengine.netdna-ssl.com/blog/files/2015/08/thestocks-imagem.jpg" class="card__img"/>
          </div>
        </div>
    <div class="card">
          <div>
            <img src="https://1h4hfe10xz8m3g3xkh2wb9lc-wpengine.netdna-ssl.com/blog/files/2015/08/thestocks-imagem.jpg" class="card__img"/>
          </div>
        </div>
    <div class="card">
          <div>
            <img src="https://1h4hfe10xz8m3g3xkh2wb9lc-wpengine.netdna-ssl.com/blog/files/2015/08/thestocks-imagem.jpg" class="card__img"/>
          </div>
        </div>
    <div class="card">
          <div>
            <img src="https://1h4hfe10xz8m3g3xkh2wb9lc-wpengine.netdna-ssl.com/blog/files/2015/08/thestocks-imagem.jpg" class="card__img"/>
          </div>
        </div>
    <div class="card">
          <div>
            <img src="https://1h4hfe10xz8m3g3xkh2wb9lc-wpengine.netdna-ssl.com/blog/files/2015/08/thestocks-imagem.jpg" class="card__img"/>
          </div>
        </div>
  </div>
  <button class="btn js-add-card">add a card</button>
</div>

CSS代码：

/* layout */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  grid-auto-rows: 12rem;
  grid-gap: 16px;
  grid-auto-flow: dense;
}

.grid--big-columns {
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
}

.grid--big-gap {
  grid-gap: 2.5rem;
}

/* styling */

.card--expanded {
  grid-column: span 3;
  grid-row: span 3;
}

 .card--expanded > .card__img {
    transform: scale(1.03);
  }

@keyframes fadeIn {
  0% {
    opacity: 0;
    transform: scale(0);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.fade-in {
  opacity: 0;
  animation: fadeIn 0.4s forwards;
  animation-delay: 0.3s;
}

.card {
  cursor: pointer;
  overflow: hidden;
  position: relative;
}

.card__img {
  transition: transform 1s;
}

body {
  background-color: #191919;
  color: lightgray;
  font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI",
    "Roboto", "Helvetica Neue", Arial, sans-serif;
  font-size: 1.1rem;
}

.mb-4 {
  margin-bottom: 1rem;
}

.p-4 {
  padding: 1rem;
}

button {
  padding: 0.75rem;
  margin-right: 0.75rem;
  background-color: #191919;
  color: lightgray;
  border: 1px solid lightgray;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: hsla(0, 0%, 83%, 0.05);
}
button:focus {
  box-shadow: 0 0 0 3px #7396e4;
  outline: none;
}

a {
  font-weight: bold;
  color: #7396e4;
  text-decoration: none;
  &:hover {
    text-decoration: underline;
  }
}

code {
  color: #7396e4;
}

JS代码：

window.CP.PenTimer.MAX_TIME_IN_LOOP_WO_EXIT = 6000;
const grid = document.querySelector(".grid");

// event handler to toggle grid sizing
document
  .querySelector(".js-toggle-grid-columns")
  .addEventListener("click", () => grid.classList.toggle("grid--big-columns"));

document
  .querySelector(".js-toggle-grid-gap")
  .addEventListener("click", () => grid.classList.toggle("grid--big-gap"));

const addCard = () => {
  return fetch(
    `https://source.unsplash.com/random/${Math.floor(Math.random() * 1000)}`
  )
};

// event handler to add a new card
document.querySelector(".js-add-card").addEventListener("click", addCard);

// event handler to toggle card size on click
grid.addEventListener("click", ev => {
  let target = ev.target;
  while (target.tagName !== "HTML") {
    if (target.classList.contains("card")) {
      target.classList.toggle("card--expanded");
      return;
    }
    target = target.parentElement;
  }
});

Promise.all([...Array(10).keys()].map(addCard)).then(() => {
  animateCSSGrid.wrapGrid(grid, {
    duration: 350,
    stagger: 10,
    onStart: elements =>
      console.log(`started animation for ${elements.length} elements`),
    onEnd: elements =>
      console.log(`finished animation for ${elements.length} elements`)
  });
});

这里有两个链接：CodePen和BlazorFiddle。

感谢您的关注。

Answer 1

在Blazor渲染您要引用的元素之前，将调用您的js代码。

要使其正常工作，请执行以下操作：将整个js包装在一个函数中。我们称它为init。在使用它时，请删除window.CP.PenTimer.MAX_TIME_IN_LOOP_WO_EXIT = 6000;行，我猜这是CodePen特有的

<script>
 function init() {
  const grid = document.querySelector(".grid");
  // (...)
 }
</script>

在您的组件中，在@page指令后添加以下内容

@inject IJSRuntime jsRuntime

这将注入您从blazor进行js互操作所需的内容。

然后将以下代码添加到组件代码的末尾以调用该方法：

@code {
  protected override async Task OnAfterRenderAsync(bool isFirst) {
    if (isFirst) {
      // invokes the init function once Blazor is initiated and 
      // your component has rendered the first time.
      await jsRuntime.InvokeAsync<object>("init");
    }
  }
}

当我将代码从CodePen传递到BlazorFiddle或一个Blazor项目时，该代码将按预期停止工作

1 个答案: