Vue Example

Vue 2.0 is a progressive JavaScript framework. Core is small and fast, but there many plug-ins to extend Vue.

i18n4v provides vue.js plugin, called i18n4vue.

Install Plugin

$ npm install i18n4vue --save

Plugin Reference

You can register this plugin by using Vue.use method.

Vue.use(require('i18n4vue'));

It provides v-i18n directive and i18n() method:

<!-- text contents of tags that has v-i18n directive become translation key -->
<h3 v-i18n>Language Select</h3>

<!-- if translation contains HTML tags, use .safe modifier -->
<h3 v-i18n.safe>Language Select</h3>

<th v-for="label in dayOfWeekLabels">{{ i18n(label) }}</th>

<!-- This form can use whole feature of i18n4, including pluralisation feature -->
<div>{{ i18n('They have {{num}} records', 10) }}</div>

Sample Code

Source

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<script type="text/javascript" src="../_static/i18n4v.js"></script>
<script type="text/javascript" src="../_static/i18n4vue.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.0.3/vue.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue-router/2.0.1/vue-router.js"></script>

<div id="app-calendar">
    <router-view></router-view>
</div>

<script>

Vue.use(i18n4vue);

var router, vm;
var translations = {
    en: {
        values: {
            "Language Select": "Language Select",
            Sun: "Sun", Mon: "Mon", Tue: "Tue", Wed: "Wed", Thu: "Thu", Fri: "Fri", Sat: "Sat",
            "Previous Month": "Previous Month",
            "Next Month": "Next Month",
            "%{month} %{year}": "%{month} %{year}",
            1: "January", 2: "February", 3: "March", 4: "April",
            5: "May", 6: "June", 7: "July", 8: "August",
            9: "September", 10: "October", 11: "November", 12: "December"
        }
    },
    ja: {
        values: {
            "Language Select": "言語選択",
            Sun: "日曜", Mon: "月曜", Tue: "火曜", Wed: "水曜", Thu: "木曜", Fri: "金曜", Sat: "土曜",
            "Previous Month": "前月",
            "Next Month": "次月",
            "%{month} %{year}": "%{year} %{month}",
            1: "睦月", 2: "如月", 3: "弥生", 4: "卯月",
            5: "皐月", 6: "水無月", 7: "文月", 8: "葉月",
            9: "長月", 10: "神無月", 11: "霜月", 12: "師走"
        }
    }
};

// Generates calendar
function calcCalendar(year, month) {
    var i, d;
    var firstDay = new Date(year, month-1, 1).getDay();
    var last = new Date(year, month, 0);
    var weeks = [];
    var week = [];
    for (i = 0; i < firstDay; i++) {
        week.push('');
    }
    for (d = 1; d <= last.getDate(); d++) {
        week.push(d);
        if (week.length === 7) {
            weeks.push(week);
            week = [];
        }
    }
    for (i = 0; i < (6 - last.getDay()); i++) {
        week.push('');
    }
    weeks.push(week);
    return weeks;
}

Vue.component('calendar', {
    props: {
        year: Number,
        month: Number
    },
    template: [
        '<table>',
            '<thead>',
                '<tr>',
                    '<th v-for="label in dayOfWeekLabels">{{ i18n(label) }}</th>',
                '</tr>',
            '</thead>',
            '<tbody>',
                '<tr v-for="week in calendar">',
                    '<td v-for="day in week">{{day}}</td>',
                '</tr>',
            '</tbody>',
        '</table>'].join(''),
    computed: {
        calendar: function() {
            return calcCalendar(this.year, this.month);
        }
    },
    data: function () {
        return {
            dayOfWeekLabels: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
        };
    },
    methods: {
        i18n: i18n
    }
});

var Calendar = {
    data: function () {
        return {
            year: null,
            month: null,
        };
    },
    template: [
        '<div>',
            '<h3 v-i18n>Language Select</h3>',
            '<button v-on:click="select(\'en\')">English</button>',
            '<button v-on:click="select(\'ja\')">Japanese</button>',
            '<h3>{{ i18n("%{month} %{year}", {year: year, month: i18n(month) }) }}</h3>',
            '<button v-on:click="prev" v-i18n>Previous Month</button>',
            '<button v-on:click="next" v-i18n>Next Month</button>',
            '<calendar :year="year" :month="month"></calendar>',
        '</div>'
    ].join(''),
    created: function () {
        this.year = Number(this.$route.params.year);
        this.month = Number(this.$route.params.month);
    },
    methods: {
        prev: function () {
            if (this.month === 1) {
                router.push('/' + (this.year - 1) + '/12');
            } else {
                router.push('/' + this.year + '/' + (this.month - 1));
            }
        },
        next: function () {
            if (this.month === 12) {
                router.push('/' + (this.year + 1) + '/1');
            } else {
                router.push('/' + this.year + '/' + (this.month + 1));
            }
        },
        select: function (lang) {
            i18n.translator.add(translations[lang]);
            this.$forceUpdate();
        },
        i18n: i18n
    },
    watch: {
        $route: function () {
            this.year = Number(this.$route.params.year);
            this.month = Number(this.$route.params.month);
        }
    }
};
var date = new Date();
var thisMonth = '/' + date.getFullYear() + '/' + (date.getMonth() + 1);
router = new VueRouter({
    routes: [
        { path: '/:year/:month', component: Calendar },
        { path: '/', redirect: thisMonth }
    ]
});

function main() {
    i18n.translator.selectLanguage(Object.keys(translations), function (err, lang) {
        i18n.translator.add(translations[lang] ? translations[lang] : translations.en);
    });

    vm = new Vue({
        router: router,
        el: '#app-calendar'
    });
}

if (document.readyState !== 'loading') {
    main();
} else {
    document.addEventListener('DOMContentLoaded', main);
}
</script>