如何向后运行querySelector?

像这样的?

const elements = document.querySelectorAll("div._13NKt.copyable-text.selectable-text");
if(elements.length) elements[elements.length - 1].focus();

我想你可以使用文档。查询Selectorall(“div.\u 13NKt.可复制文本.可选文本”),然后访问索引。

//Capture the elements
let myVar = document.querySelectorAll("div._13NKt.copyable-text.selectable-text");

//Then access to the index, taking into account that the initial index is 0.
console.log(myVar[1])
//Or
var secObject = myVar[1];