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Creation:2025-02-07Last update:2025-06-29

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条件内容 / Intlayer 中的条件

Name: Intlayer
Author: Intlayer

条件如何工作

在 Intlayer 中，通过 cond 函数实现条件内容，该函数将特定条件（通常是布尔值）映射到其对应的内容。这种方法使您能够根据给定条件动态选择内容。当与 React Intlayer 或 Next Intlayer 集成时，会根据运行时提供的条件自动选择适当的内容。

设置条件内容

要在您的 Intlayer 项目中设置条件内容，请创建一个包含条件定义的内容模块。以下是各种格式的示例。

**/*.content.ts

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import { cond, type Dictionary } from "intlayer";

const myConditionalContent = {
  key: "my_key",
  content: {
    myCondition: cond({
      true: "当条件为真时的内容",
      false: "当条件为假时的内容",
      fallback: "当条件不满足时的内容", // 可选
    }),
  },
} satisfies Dictionary;

export default myConditionalContent;

如果未声明 fallback，当条件不满足时将使用最后声明的键作为 fallback。

在 React Intlayer 中使用条件内容

To utilize conditional content within a React component, import and use the useIntlayer hook from the react-intlayer package. This hook fetches the content for the specified key and allows you to pass in a condition to select the appropriate output.

**/*.tsx

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import type { FC } from "react";
import { useIntlayer } from "react-intlayer";

const ConditionalComponent: FC = () => {
const { myCondition } = useIntlayer("my_key");

return (
  <div>
    <p>
      {
        /* Output: my content when it's true */
        myCondition(true)
      }
    </p>
    <p>
      {
        /* Output: my content when it's false */
        myCondition(false)
      }
    </p>
    <p>
      {
        /* Output: my content when the condition fails */
        myCondition("")
      }
    </p>
    <p>
      {
        /* Output: my content when the condition fails */
        myCondition(undefined)
      }
    </p>
  </div>
);
};

export default ConditionalComponent;

To utilize conditional content in Next.js Client Components, retrieve it via the useIntlayer hook. Here's an example:

**/*.tsx

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"use client";

import type { FC } from "react";
import { useIntlayer } from "next-intlayer";

const ConditionalComponent: FC = () => {
const { myCondition } = useIntlayer("my_key");

return (
  <div>
    <p>{myCondition(true)}</p>
    <p>{myCondition(false)}</p>
  </div>
);
};

export default ConditionalComponent;

To utilize conditional content in Vue components, retrieve it via the useIntlayer hook. Here's an example:

**/*.vue

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<script setup lang="ts">import { useIntlayer } from "vue-intlayer";const { myCondition } = useIntlayer("my_key");</script><template><div>  <p>{{ myCondition(true) }}</p>  <p>{{ myCondition(false) }}</p></div></template>

To utilize conditional content in Svelte components, retrieve it via the useIntlayer hook. The store is accessed with $. Here's an example:

**/*.svelte

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<script lang="ts">import { useIntlayer } from "svelte-intlayer";const content = useIntlayer("my_key");</script><div><p>{$content.myCondition(true)}</p><p>{$content.myCondition(false)}</p></div>

To utilize conditional content in Preact components, retrieve it via the useIntlayer hook. Here's an example:

**/*.tsx

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import type { FC } from "preact";
import { useIntlayer } from "preact-intlayer";

const ConditionalComponent: FC = () => {
const { myCondition } = useIntlayer("my_key");

return (
  <div>
    <p>{myCondition(true)}</p>
    <p>{myCondition(false)}</p>
  </div>
);
};

export default ConditionalComponent;

To utilize conditional content in SolidJS components, retrieve it via the useIntlayer hook. Here's an example:

**/*.tsx

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import type { Component } from "solid-js";
import { useIntlayer } from "solid-intlayer";

const ConditionalComponent: Component = () => {
const { myCondition } = useIntlayer("my_key");

return (
  <div>
    <p>{myCondition(true)}</p>
    <p>{myCondition(false)}</p>
  </div>
);
};

export default ConditionalComponent;

To utilize conditional content in Angular components, retrieve it via the useIntlayer hook. Here's an example:

app.component.ts

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import { Component } from "@angular/core";import { useIntlayer } from "angular-intlayer";@Component({selector: "app-conditional",template: `  <div>    <p>{{ content().myCondition(true) }}</p>    <p>{{ content().myCondition(false) }}</p>  </div>`,})export class ConditionalComponent {content = useIntlayer("my_key");}

To utilize conditional content with vanilla-intlayer, retrieve it via the useIntlayer hook. Here's an example:

**/*.ts

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import { installIntlayer, useIntlayer } from "vanilla-intlayer";

installIntlayer();

const content = useIntlayer("my_key").onChange((newContent) => {
document.getElementById("true-content")!.textContent =
  newContent.myCondition(true);
document.getElementById("false-content")!.textContent =
  newContent.myCondition(false);
});

// Initial render
document.getElementById("true-content")!.textContent =
content.myCondition(true);
document.getElementById("false-content")!.textContent =
content.myCondition(false);

其他资源

有关配置和使用的更多详细信息，请参考以下资源：

这些资源提供了在各种环境和框架中设置和使用 Intlayer 的进一步见解。

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