It gets the t function and i18n instance inside your functional component.
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import React from'react';
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import{ useTranslation }from'react-i18next';
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​
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exportfunctionMyComponent(){
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const{ t, i18n }=useTranslation();
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// or const [t, i18n] = useTranslation();
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​
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return<p>{t('my translated text')}</p>
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}
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While most of the time you only need the t function to translate your content, you can also get the i18n instance (in order to change the language).
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i18n.changeLanguage('en-US');
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The useTranslation hook will trigger a Suspense if not ready (eg. pending load of translation files). You can set useSuspense to false if prefer not using Suspense.
When to use?
Use the useTranslation hook inside your functional components to access the translation function or i18n instance.
useTranslation params
Loading namespaces
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// load a specific namespace
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// the t function will be set to that namespace as default
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const{ t, i18n }=useTranslation('ns1');
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t('key');// will be looked up from namespace ns1
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​
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// load multiple namespaces
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// the t function will be set to first namespace as default
Not using Suspense you will need to handle the not ready state yourself by eg. render a loading component as long ready === false . Not doing so will result in rendering your translations before they loaded which will cause save missing be called although translations exists (just yet not loaded).