language-observer/dist/index.cjs.js

The LanguageObserver class provides a simple way to manage internationalization in your web application. It automates the process of applying translations and simplifies support for multiple languages.

"use strict";class o{lang="ru";observer=null;constructor(){this.initializeObserver()}static getNestedTranslation(t,a){return a.split(".").reduce((s,e)=>{if(s&&typeof s=="object"&&e in s)return s[e]},t)}safeGetTranslation(t,a){if(!t)return;const s=o.getNestedTranslation(t,a);return typeof s=="string"?s:void 0}checkInitialLanguage(){if(this.lang&&this.lang!=="ru")return;const t=this.detectLanguageFromParams();if(t)this.loadLanguage(t);else{const a=this.detectLanguageFromClass();this.loadLanguage(a)}}detectLanguageFromParams(){if(typeof window>"u")return null;const t=new URLSearchParams(window.location.search).get("land-geo");return t&&globalThis.translations[t]?(this.updateBodyClass(t),t):null}detectLanguageFromClass(){const t=Array.from(document.body.classList).find(s=>s.startsWith("locale-")),a=t?t.replace("locale-",""):"ru";return globalThis.translations[a]?a:"ru"}updateBodyClass(t){document.body.classList.forEach(a=>{a.startsWith("locale-")&&document.body.classList.remove(a)}),document.body.classList.add(`locale-${t}`)}loadLanguage(t){const a=globalThis.translations;this.lang=a[t]?t:"ru",this.applyTranslations()}applyTranslations(){const t=globalThis.translations,a=t[this.lang],s=t.ru;a&&document.querySelectorAll("[data-i18n], [data-i18n-attr]").forEach(e=>{const r=e.getAttribute("data-i18n"),l=e.getAttribute("data-i18n-attr");if(r){let n=this.safeGetTranslation(a,r);!n&&s&&(n=this.safeGetTranslation(s,r)),n&&this.updateElementText(e,n)}if(l){let n;try{n=JSON.parse(l)}catch{return}Object.entries(n).forEach(([u,c])=>{let i=this.safeGetTranslation(a,c);!i&&s&&(i=this.safeGetTranslation(s,c)),i&&e.setAttribute(u,i)})}})}updateElementText(t,a){t.hasChildNodes()?t.childNodes.forEach(s=>{s.nodeType===Node.TEXT_NODE&&(s.textContent=a)}):t.textContent=a}initializeObserver(){this.observer=new MutationObserver(t=>{for(const a of t)if(a.type==="attributes"&&a.attributeName==="class"){const s=this.detectLanguageFromClass();s!==this.lang&&this.loadLanguage(s)}}),this.observer.observe(document.body,{attributes:!0,attributeFilter:["class"]})}init(t={}){const{lang:a}=t;a?(this.updateBodyClass(a),this.lang=a,this.loadLanguage(a)):this.checkInitialLanguage()}updateTranslations(){this.applyTranslations()}async loadTranslations(t,a){const s=await a(t);globalThis.translations[t]=s,t===this.lang&&this.applyTranslations()}}module.exports=o;