我要让我的 javascript 从我的图像文件夹中保留一张随机图像，在写完所有代码后图像没有显示，我不知道为什么

Question

var randomNumber1 = Math.floor(Math.random()*6) + 1;
var diceName = "images/dice" + randomNumber1 + ".png"

document.querySelectorAll("img")[0].setAttribute("src", "diceName")

Answer 1

You are setting a string literal to src attribute.

remove quotes from "diceName".

 document.querySelectorAll("img")[0].setAttribute("src", diceName)