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main.js
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main.js
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let myImage = document.querySelector("img");
myImage.onclick = function () {
let mySrc = myImage.getAttribute("src");
if (mySrc === "Firefox_logo.png") {
myImage.setAttribute("src", "Firefox2.png");
} else {
myImage.setAttribute("src", "Firefox_logo.png");
}
};
let myButton = document.querySelector("button");
let myHeading = document.querySelector("h1");
function setUserName() {
let myName = prompt("请输入你的名字。");
localStorage.setItem("name", myName);
myHeading.textContent = "你真牛逼," + myName;
}
if (!localStorage.getItem("name")) {
setUserName();
} else {
let storedName = localStorage.getItem("name");
myHeading.textContent = "你真牛逼," + storedName;
}
myButton.onclick = function () {
setUserName();
};
function setUserName() {
let myName = prompt("请输入你的名字。");
if (!myName) {
setUserName();
} else {
localStorage.setItem("name", myName);
myHeading.textContent = "你真牛逼," + myName;
}
}