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Geolocation APIをjQuery.Deferredでラップ

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Geolocation APIをjQuery.Deferredでラップ

function geolocation() {
    var deferred = $.Deferred();

    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(function(position) {
            deferred.resolve(position.coords);
        }, function (error) {
            deferred.reject(error.code);
        });
    } else {
        deferred.reject();
    }

    return deferred.promise();
}


geolocation()
    .done(function(coords) {
        console.log(coords);
    })
    .fail(function(errorCode) {
        switch (errorCode) {
        case 1:
            // 位置情報の利用が許可されていません
            break;
        case 2:
            // デバイスの位置が判定できません
            break;
        case 3:
            // タイムアウト
            break;
        default:
            // APIが未対応
        }
    });
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