javascript if else 語句不起作用。 即使我單擊 twoStory 圖像，它也會返回 singleStory。 我試過了！=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)

單等號將singleStory的值分配給houseStory 。 ===是比較（或令人不悅的== ）。