javascript if else 语句不起作用。 即使我单击 twoStory 图像，它也会返回 singleStory。 我试过了！=和---

Question

const detailedEstimate = () => {
document.querySelector("#btnDisplayImage").onclick = () => {


let houseStoriesLabel = document.createElement("label");
houseStoriesLabel.innerHTML = "<br>" + "number of stories is " + houseStory + "<br>";
document.body.appendChild(houseStoriesLabel);


if (houseStory = singleStory) {
  houseStory.setAttribute("src", "../images/singleStoryHouse.jpg");
  document.body.appendChild(houseStory);
  console.log('please make a choice');
}

Answer 1

你需要：

if (houseStory === singleStory)

不是

if (houseStory = singleStory)

单等号将singleStory的值分配给houseStory 。 ===是比较（或令人不悦的== ）。