Unable to dynamically change locale for Vue i18n
I have a small vue application in which I want to implement the vue-i18n plugin to make my application multilingual. I have installed vue-i18n plugin from vue cli. I have two locales and everything works as expected - whenever I manually change the locale from the .env file to the desired language, the language in the application also changes. However, whenever I try to change it using the buttons on the frontend, I fail to do so.
This is the content in my i18n.js file:
import { createI18n } from 'vue-i18n'
function loadLocaleMessages() {
const locales = require.context('./locales', true, /[A-Za-z0-9-_,\s]+\.json$/i);
const messages = {};
locales.keys().forEach(key => {
const matched = key.match(/([A-Za-z0-9-_]+)\./i);
if (matched && matched.length > 1) {
const locale = matched[1];
messages[locale] = locales(key);
}
})
return messages;
}
export default createI18n({
legacy: false,
locale: process.env.VUE_APP_I18N_LOCALE || 'en',
fallbackLocale: process.env.VUE_APP_I18N_FALLBACK_LOCALE || 'en',
messages: loadLocaleMessages()
})
This is in the .env file:
VUE_APP_I18N_LOCALE=en VUE_APP_I18N_FALLBACK_LOCALE=en
This is the code from the tutorials I saw, they access the locale via this.$i18n.locale, however, this doesn't work for me, this is how I tried to implement it:
<template>
<div class="hello">
<h1>Hello World</h1>
<h2>{{ t("hello") }}</h2>
<h2>{{ t("message") }}</h2>
<button @click="SetLocale('en')">EN</button>
<button @click="SetLocale('nl')">NL</button>
</div>
</template>
<script>
import { useI18n } from "vue-i18n";
export default {
name: "HelloWorld",
setup() {
const { t } = useI18n({
inheritLocale: true,
useScope: "local",
});
// Something todo ..
return {
t
};
},
methods: {
SetLocale(locale) {
console.log(locale);
this.$i18n.locale = locale;
},
},
};
</script>
<i18n>
{
"en": {
"hello": "Hello i18n in English! (from component)",
},
"nl": {
"hello": "Hello i18n in Dutch! (from component)",
}
}
</i18n>
The error that occurs when clicking the button is:
[Vue warn]: Unhandled error during execution of native event handler
Uncaught TypeError: Cannot set property of undefined (set 'Locales')
I tried some other solutions like i18n.locale and this.$root.$i18n.locale but they don't seem to work either.
Additionally, when I try to access the
{{ t("message") }}
of the message from the JSON file in the locale folder, I get these warnings:[intlify] The 'message' key was not found in the 'nl' locale message.
[intlify] Fallback to translating the "message" key with the "en" locale
[intlify] The 'Message' key was not found in the 'en' locale message.
[intlify] Fallback to using the "nl" locale to translate the "message" key
My question is, where am I doing something wrong and is there a way to get rid of the warning I get when I try to access a JSON file from the locale folder?
