element-plus/es/locale/index.js

A Component Library for Vue3.0

import dayjs from 'dayjs';
import defaultLang from './lang/en';

let lang = defaultLang;
let i18nHandler = null;
const i18n = (fn) => {
    i18nHandler = fn;
};
function template(str, option) {
    if (!str || !option)
        return str;
    return str.replace(/\{(\w+)\}/g, (_, key) => {
        return option[key];
    });
}
const defaultTranslator = (...args) => {
    const [path, option] = args;
    let value;
    const array = path.split('.');
    let current = lang;
    for (let i = 0, j = array.length; i < j; i++) {
        const property = array[i];
        value = current[property];
        if (i === j - 1)
            return template(value, option);
        if (!value)
            return '';
        current = value;
    }
};
const t = (...args) => {
    if (i18nHandler) {
        const translation = i18nHandler(...args);
        if (!translation) {
            return defaultTranslator(...args);
        }
    }
    return defaultTranslator(...args);
};
const use = (l) => {
    lang = l || lang;
    if (lang.name) {
        dayjs.locale(lang.name);
    }
};
const setLocale = use;

export { i18n, setLocale, t, use };