我正在開發(fā)一個(gè)供個(gè)人使用的 chrome 擴(kuò)展（使用 Javascript），它會(huì)抓取一些數(shù)據(jù)并將其導(dǎo)出到 csv 文件，現(xiàn)在我在提取一些文本節(jié)點(diǎn)時(shí)遇到問(wèn)題，因?yàn)樗鼈兊倪x擇器（chrome css 選擇器）會(huì)根據(jù)如何變化而變化存在許多具有相同類別但內(nèi)容不同的標(biāo)簽。這是 Html 的示例：<li class="sc-account-rows__row"><div class="sc-account-rows__row__label">RTF</div> // Title Label<div class="sc-account-rows__row__price--container"><div class="sc-account-rows__row__price">-$ 1.485</div> // Price Label <- How to get This?</div></li><li class="sc-account-rows__row"><div class="sc-account-rows__row__label">some text</div> // Another Label<div class="sc-account-rows__row__price--container"><div class="sc-account-rows__row__price">-$ 2.418</div> // Another price which I don't need but has same class</div></li>換句話說(shuō)，這個(gè)特定標(biāo)簽的選擇器可以是：#root-app > div > div.sc-account-section > div.sc-account-section__container > div.sc-account-module > div:nth-child(3) > ul > li:nth-child(1) > div.sc-account-rows__row__price--container > div或者#root-app > div > div.sc-account-section > div.sc-account-section__container > div.sc-account-module > div:nth-child(3) > ul > li:nth-child(9) > div.sc-account-rows__row__price--container > divAs you can see there is no Id or Name assigned to this particular label, I was using (successfully) this piece of code when the selector was always the same. （注意這是在 iframe 中）var RTF_fee = "#root-app > div > div.sc-account-section > div.sc-account-section__container > div.sc-account-module > div:nth-child(3) > ul > li:nth-child(4) > div.sc-account-rows__row__price--container > div";    if (iframe_document.body.contains(iframe_document.querySelector(RTF_fee))) {        RTF_value = iframe_document.querySelector(RTF_fee).textContent;        console.log(RTF_value);    }    else {        RTF_value = "0";        console.log(RTF_value);    }所以，問(wèn)題是：如果我沒(méi)有唯一的選擇器/ID，如何獲取價(jià)格標(biāo)簽中的文本內(nèi)容？我想我可以處理價(jià)格標(biāo)簽類別始終為“sc-account-rows__row__price”并且價(jià)格之前的標(biāo)簽文本始終為“RTF”的事實(shí)，但我不知道如何編碼或者是否有更好的選擇。我為我糟糕的“編程”語(yǔ)言道歉，我只是一個(gè)臨時(shí)程序員）提前致謝。