爲何JavaScript變量會以美圓符號開頭？ - Why would a JavaScript variable start with a dollar sign?

問題：

I quite often see JavaScript with variables that start with a dollar sign. 我常常看到JavaScript帶有以美圓符號開頭的變量。 When/why would you choose to prefix a variable in this way? 您什麼時候/爲何選擇以這種方式爲變量添加前綴？

(I'm not asking about $('p.foo') syntax that you see in jQuery and others, but normal variables like $name and $order ) （我不是在問您在jQuery和其餘語言中看到的$('p.foo')語法，而是普通變量，例如$name和$order ）

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解決方案：

參考一： https://stackoom.com/question/rYD/爲何JavaScript變量會以美圓符號開頭
參考二： https://oldbug.net/q/rYD/Why-would-a-JavaScript-variable-start-with-a-dollar-sign