英文:
Javascript destructuring in method
问题
getAdvertisingChannelHtml方法中的代码使用了解构赋值（destructuring assignment），并将对象属性赋值给方法的参数。这种写法是JavaScript中的一种语法糖，用于简化代码。下面是对这段代码的详细解释：
getAdvertisingChannelHtml(
{ site, adViews, clicks, conversions, conversionRate } = this
)
在这个方法中，参数部分使用了解构赋值。解构赋值允许你从传递给方法的对象中提取特定属性，并将它们赋值给方法的参数。这里的目的是从传递的对象（或者如果没有传递对象，则使用this对象）中提取以下属性：
siteadViewsclicksconversionsconversionRate
如果没有传递对象给这个方法，它会默认使用this对象，也就是AdvertisingChannel类的实例对象，这是为了处理调用方法时可能的情况。
接下来，这些属性用于构建一个HTML字符串，包含了广告渠道的信息。这个HTML字符串用于表示广告渠道的属性，如站点名称、广告浏览次数、点击次数、转化次数以及转化率。
总结一下，这段代码允许你传递一个包含广告渠道信息的对象（或者使用类的实例对象的属性），然后将这些信息用于生成一个HTML字符串。这种做法可以使代码更加简洁和可读，但最佳实践取决于你的具体需求和项目的上下文。
英文:
Can someone explain what exactly is going on in depth and if doing it this way is best practice for this line:
getAdvertisingChannelHtml({site, adViews, clicks, conversions, conversionRate} = this){
My understanding is that I am destructuring in a method and passing Object Properties in a method and making it equal to the this object?
class AdvertisingChannel {
constructor(data) {
Object.assign(this, data);
this.conversionRate = (this.conversions / this.clicks) * 100;
}
getAdvertisingChannelHtml(
{ site, adViews, clicks, conversions, conversionRate } = this
) {
return `
<div class="site-name"> ${site} </div>
<div>Views: ${adViews} </div>
<div>Clicks: ${clicks} </div>
<div>Conversions: ${conversions} </div>
<div>Conv. Rate: <span class="highlight"> ${conversionRate} %</span></div>
`;
}
}
Tried looking at documentation and trying to find out more about what exactly is going on but was still confused.
答案1
得分: 1
该函数将解构其对象参数并将值分配给特定变量（site、adViews、clicks、conversions、conversionRate）。如果在调用函数时没有传递参数，参数默认设置为this。
const data = {
site: 'stackoverflow.com',
adViews: 10,
clicks: 1000,
conversions: 10,
};
const advertisingChannel = new AdvertisingChannel(data);
advertisingChannel.getAdvertisingChannelHtml();
/**
* site: 'stackoverflow.com'
* adViews: 10
* clicks: 1000
* conversions: 10
* conversionRate: 1
*/
advertisingChannel.getAdvertisingChannelHtml({
site: 'example.com',
adViews: 2,
clicks: 2000,
conversions: 20,
});
/**
* site: 'example.com'
* adViews: 2
* clicks: 2000
* conversions: 20
* conversionRate: undefined（因为尚未设置）
*/
参考：默认参数
英文:
The function will destructure its Object parameter and assign the values to specific variables (site, adViews, clicks, conversions, conversionRate). The parameter also got set to this by default if you called the function without passing an argument.
const data = {
site: 'stackoverflow.com',
adViews: 10,
clicks: 1000,
conversions: 10,
};
const advertisingChannel = new AdvertisingChannel(data);
advertisingChannel.getAdvertisingChannelHtml();
/**
* site: 'stackoverflow.com'
* adViews: 10
* clicks: 1000
* conversions: 10
* conversionRate: 1
*/
advertisingChannel.getAdvertisingChannelHtml({
site: 'example.com',
adViews: 2,
clicks: 2000,
conversions: 20,
});
/**
* site: 'example.com'
* adViews: 2
* clicks: 2000
* conversions: 20
* conversionRate: undefined ( because it does not set yet)
*/
Refer: Default parameters
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