作者:
    Aymeric PINEAU
    Creation:2024-08-11Last update:2025-06-29

    枚举 / 复数形式

    枚举的工作原理

    在 Intlayer 中，枚举是通过 enu 函数实现的，该函数将特定的键映射到对应的内容。这些键可以表示数值、范围或自定义标识符。当与 React Intlayer 或 Next Intlayer 一起使用时，会根据应用程序的语言环境和定义的规则自动选择合适的内容。

    设置枚举

    要在您的 Intlayer 项目中设置枚举，您需要创建一个包含枚举定义的内容模块。以下是一个关于汽车数量的简单枚举示例：

    **/*.content.ts
    import { enu, type Dictionary } from "intlayer";

const carEnumeration = {
  key: "car_count",
  content: {
    numberOfCar: enu({
      "<-1": "少于负一辆车",
      "-1": "负一辆车",
      "0": "没有车",
      "1": "一辆车",
      ">5": "几辆车",
      ">19": "许多车",
      "fallback": "备用值", // 可选
    }),
  },
} satisfies Dictionary;

export default carEnumeration;

    在此示例中，enu 将各种条件映射到特定内容。当在 React 组件中使用时，Intlayer 可以根据给定的变量自动选择合适的内容。

    在 Intlayer 枚举中，声明的顺序非常重要。第一个有效的声明将被选中。如果多个条件适用，请确保它们的顺序正确，以避免意外行为。
    如果未声明备用值，当没有匹配的键时，函数将返回 undefined。

    在 React Intlayer 中使用枚举

    To use enumeration in a React component, you can leverage the useIntlayer hook from the react-intlayer package. This hook retrieves the correct content based on the specified ID. Here's an example of how to use it:

    **/*.tsx
    import type { FC } from "react";
import { useIntlayer } from "react-intlayer";

const CarComponent: FC = () => {
  const { numberOfCar } = useIntlayer("car_count");

  return (
    <div>
      <p>
        {
          numberOfCar(0) // Output: No cars
        }
      </p>
      <p>
        {
          numberOfCar(6) // Output: Some cars
        }
      </p>
      <p>
        {
          numberOfCar(20) // Output: Many cars
        }
      </p>
      <p>
        {
          numberOfCar(0.01) // Output: Fallback value
        }
      </p>
    </div>
  );
};

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

    **/*.tsx
    "use client";

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

const CarComponent: FC = () => {
  const { numberOfCar } = useIntlayer("car_count");

  return (
    <div>
      <p>{numberOfCar(6)}</p>
    </div>
  );
};

export default CarComponent;

    To use enumeration in Vue components, retrieve it via the useIntlayer hook. Here's an example:

    **/*.vue
    <script setup lang="ts">
import { useIntlayer } from "vue-intlayer";

const { numberOfCar } = useIntlayer("car_count");
</script>

<template>
  <div>
    <p>{{ numberOfCar(6) }}</p>
  </div>
</template>

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

    **/*.svelte
    <script lang="ts">
import { useIntlayer } from "svelte-intlayer";

const content = useIntlayer("car_count");
</script>

<div>
  <p>{$content.numberOfCar(6)}</p>
</div>

    To use enumeration in Preact components, retrieve it via the useIntlayer hook. Here's an example:

    **/*.tsx
    import type { FC } from "preact";
import { useIntlayer } from "preact-intlayer";

const CarComponent: FC = () => {
  const { numberOfCar } = useIntlayer("car_count");

  return (
    <div>
      <p>{numberOfCar(6)}</p>
    </div>
  );
};

export default CarComponent;

    To use enumeration in SolidJS components, retrieve it via the useIntlayer hook. Here's an example:

    **/*.tsx
    import type { Component } from "solid-js";
import { useIntlayer } from "solid-intlayer";

const CarComponent: Component = () => {
  const { numberOfCar } = useIntlayer("car_count");

  return (
    <div>
      <p>{numberOfCar(6)}</p>
    </div>
  );
};

export default CarComponent;

    To use enumeration in Angular components, retrieve it via the useIntlayer hook. Here's an example:

    app.component.ts
    import { Component } from "@angular/core";
import { useIntlayer } from "angular-intlayer";

@Component({
  selector: "app-car",
  template: `
    <div>
      <p>{{ content().numberOfCar(6) }}</p>
    </div>
  `,
})
export class CarComponent {
  content = useIntlayer("car_count");
}

    To use enumeration with vanilla-intlayer, retrieve it via the useIntlayer hook. Here's an example:

    **/*.ts
    import { installIntlayer, useIntlayer } from "vanilla-intlayer";

installIntlayer();

const content = useIntlayer("car_count").onChange((newContent) => {
  document.getElementById("cars")!.textContent = newContent.numberOfCar(6);
});

// Initial render
document.getElementById("cars")!.textContent = content.numberOfCar(6);

    附加资源

    有关配置和使用的更详细信息，请参阅以下资源：

    这些资源提供了关于在不同环境和各种框架中设置和使用 Intlayer 的更多见解。

    Using Ordinal Enumeration

    To use this in a React component, call the enumeration with the last digit of the number to get the correct suffix, then pass the full count as the insertion value:

    **/*.tsx
    import type { FC } from "react";
import { useIntlayer } from "react-intlayer";

const RankingComponent: FC<{ count: number }> = ({ count }) => {
  const { ordinal } = useIntlayer("ranking_component");

  // Get the last digit to determine the correct suffix
  const lastDigit = Math.abs(count) % 10;

  return (
    <div>
      <p>
        {
          ordinal(lastDigit)({ count }) // e.g., "5th place" for count=5
        }
      </p>
    </div>
  );
};

    To use this in Next.js Client Components, call the enumeration with the last digit of the number to get the correct suffix, then pass the full count as the insertion value:

    **/*.tsx
    "use client";

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

const RankingComponent: FC<{ count: number }> = ({ count }) => {
  const { ordinal } = useIntlayer("ranking_component");
  const lastDigit = Math.abs(count) % 10;

  return (
    <div>
      <p>{ordinal(lastDigit)({ count })}</p>
    </div>
  );
};

export default RankingComponent;

    To use this in Vue components, call the enumeration with the last digit of the number to get the correct suffix, then pass the full count as the insertion value:

    **/*.vue
    <script setup lang="ts">
import { useIntlayer } from "vue-intlayer";

defineProps<{ count: number }>();

const { ordinal } = useIntlayer("ranking_component");
</script>

<template>
  <div>
    <p>{{ ordinal(Math.abs(count) % 10)({ count }) }}</p>
  </div>
</template>

    To use this in Svelte components, call the enumeration with the last digit of the number to get the correct suffix, then pass the full count as the insertion value:

    **/*.svelte
    <script lang="ts">
import { useIntlayer } from "svelte-intlayer";

export let count: number;

const content = useIntlayer("ranking_component");
$: lastDigit = Math.abs(count) % 10;
</script>

<div>
  <p>{$content.ordinal(lastDigit)({ count })}</p>
</div>

    To use this in Preact components, call the enumeration with the last digit of the number to get the correct suffix, then pass the full count as the insertion value:

    **/*.tsx
    import type { FC } from "preact";
import { useIntlayer } from "preact-intlayer";

const RankingComponent: FC<{ count: number }> = ({ count }) => {
  const { ordinal } = useIntlayer("ranking_component");
  const lastDigit = Math.abs(count) % 10;

  return (
    <div>
      <p>{ordinal(lastDigit)({ count })}</p>
    </div>
  );
};

export default RankingComponent;

    To use this in SolidJS components, call the enumeration with the last digit of the number to get the correct suffix, then pass the full count as the insertion value:

    **/*.tsx
    import type { Component } from "solid-js";
import { useIntlayer } from "solid-intlayer";

const RankingComponent: Component<{ count: number }> = (props) => {
  const { ordinal } = useIntlayer("ranking_component");

  return (
    <div>
      <p>{ordinal(Math.abs(props.count) % 10)({ count: props.count })}</p>
    </div>
  );
};

export default RankingComponent;

    To use this in Angular components, call the enumeration with the last digit of the number to get the correct suffix, then pass the full count as the insertion value:

    app.component.ts
    import { Component, Input } from "@angular/core";
import { useIntlayer } from "angular-intlayer";

@Component({
  selector: "app-ranking",
  template: `
    <div>
      <p>{{ content().ordinal(lastDigit())({ count }) }}</p>
    </div>
  `,
})
export class RankingComponent {
  @Input() count!: number;

  content = useIntlayer("ranking_component");

  lastDigit() {
    return Math.abs(this.count) % 10;
  }
}

    To use this with vanilla-intlayer, call the enumeration with the last digit of the number to get the correct suffix, then pass the full count as the insertion value:

    **/*.ts
    import { installIntlayer, useIntlayer } from "vanilla-intlayer";

installIntlayer();

const content = useIntlayer("ranking_component");
const lastDigit = Math.abs(5) % 10;

document.getElementById("ranking")!.textContent = content.ordinal(lastDigit)({
  count: 5,
});

    Additional Resources

    For more detailed information on configuration and usage, refer to the following resources:

    These resources provide further insights into the setup and usage of Intlayer in different environments and with various frameworks.

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