描述未定义

Question

我的代码是

    var data = JSON.parse(http.responseText);
        var weatherData = new Weather(cityName, data);
        weatherData.temperature = data.main.temp;
        updateWeather(weatherData);

    function Weather(cityName, data) {
    this.cityName = cityName
    data.weather[0].description = descriptions;
    this._temperature = '';
}

    function updateWeather(weatherData) {
    weatherCity.textContent = weatherData.cityName;
    weatherDescription.textContent = weatherData.descriptions;
    weatherTemperature.textContent = weatherData.temperature;

    loadingText.style.display = 'none';
    weather.style.display = 'block';
}

我得到的错误描述没有定义。如果我这样做，就能正常工作

var data = JSON.parse(http.responseText);
        var weatherData = new Weather(cityName, data.weather[0].description);
        weatherData.temperature = data.main.temp;
        updateWeather(weatherData);

    function Weather(cityName, description) {
    this.cityName = cityName
    this.description = descriptions;
    this._temperature = '';
}

    function updateWeather(weatherData) {
    weatherCity.textContent = weatherData.cityName;
    weatherDescription.textContent = weatherData.descriptions;
    weatherTemperature.textContent = weatherData.temperature;

    loadingText.style.display = 'none';
    weather.style.display = 'block';
}

我不知道现在该做什么。我没有得到返回值吗？有人能帮我修一下吗?这样我就能明白了。我是个新手，所以这可能是一个愚蠢的问题。尝试第一种方法，因为我有更多的东西要添加，比如天气压力，风速，日出等。

Answer 1

在下面的代码块中有一个拼写错误-

function Weather(cityName, description) {
this.cityName = cityName
this.description = descriptions;
this._temperature = '';

请将this.description = descriptions更正为this.description = description

Answer 2

这里

function Weather(cityName, description) {
    this.cityName = cityName
    this.description = descriptions;  // <--
    this._temperature = '';
}

你写的是descriptions而不是description