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javascript - 如何将输出存储在 localStorage 中?

转载 作者:行者123 更新时间:2023-12-05 05:49:01 25 4
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我正在开发我的第一个 JavaScript 项目(回文检查器),但有点卡住了。我了解了 localStorage() 但我似乎无法在自己的项目中实现它。如果有人能给我指出正确的方向,或者编写伪代码来说明我应该怎么做才能让它工作,那就太棒了。我真的很想自己解决,但这里非常需要一点帮助。谢谢 :)。 我的 JavaScript 代码(以及供引用的 HTML 和 CSS:

编辑: 我想使用 localStorage() 在屏幕上显示结果(每个结果单独一行)并再次使用它来使用户能够删除单击按钮时的结果。

const checkBtn = document.getElementById("check-word");
const clearBtn = document.getElementById("clear-history");
const outputField = document.getElementById("word-checked");
let array = [];

checkBtn.addEventListener("click", () => {
const str = document.getElementById("input").value;
array = [...array, str];

console.log(array);
palindrome(str);
renderResult();

function palindrome(str) {
const lettersOnly = str.toLowerCase().match(/[a-z0-9]/g);
return lettersOnly.join("") === lettersOnly.reverse().join("");
}

renderResult();

function renderResult() {
if (palindrome(str) === true) {
outputMessage = `︎✔︎ '${str}' is a palindrome!`
} else {
outputMessage = `𐄂 '${str}' is not a palindrome!`
}
outputField.textContent = outputMessage;
}

document.getElementById("input").value = ""; // clear input field after clicking on checkBtn
})

// clearBtn.addEventListener("click", () => {
// localStorage.clear();
// array = [];
// // render again!
// })
* {
background-color: #121212;
font-size: 16px;
margin: 0;
padding: 0;
}

h1 {
font-family: "VT323", monospace;
font-size: 5rem;
color: #CE1212;
text-align: center;
margin-top: 50px;
}

.container {
font-family: "Nanum Gothic Coding", monospace;
color: white;
width: 75%;
height: 62.5vh;
margin: 25px auto 25px auto;

/* border: 2.5px solid; */
border-color: white;
padding: 15px;
}

.input {
margin-left: 25px;
}

.input-field {
margin-left: 25px;
margin-top: 12.5px;
padding: 7.5px;
font-family: "Nanum Gothic Coding", monospace;
color: white;
border: 1px solid;
}

.input-field:focus::placeholder {
color: transparent;
}

.check-word, .clear-history {
padding: 7.5px;
font-family: "Nanum Gothic Coding", monospace;
color: white;
border: 1px solid;
border-color: white;
cursor: pointer;
}

.check-word:hover, .clear-history:hover {
color: #CE1212;
}

.child-1 {
margin-top: 50px;
margin-left: 25px;
/* border: 1px solid; */
padding: 15px;
}

#word-checked {
margin-top: 15px;
}

.footer {
font-family: "Nanum Gothic coding", monospace;
color: white;
text-align: center;
margin-bottom: 25px;
}

a:link, a:visited {
color: white;
text-decoration: none;
}

a:hover, a:active {
color: #CE1212;
text-decoration: underline;
}








/*
top, right, bottom, left
*/
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Palindrome Checker</title>
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Nanum+Gothic+Coding&family=VT323&display=swap" rel="stylesheet">
<link rel="stylesheet" href="index.css">
</head>
<body>
<main>
<h1>🌮 Palindrome Checker 🐱</h1>
<div class="container">
<label for="input" class="input">Type a word or phrase</label>
<br>
<input type="text" name="input" class="input-field" id="input" placeholder="Type something...">
<button type="button" class="check-word" id="check-word">Check word</button>

<button type="button" class="clear-history" id="clear-history">Clear history</button>

<div class="child-1">
<p id="word-checked">Results will be shown here!</p>
</div>
</div>
</main>

<footer class="footer">
<p>Built by <a href="https://github.com/YinChuRijnaard" target="_blank">Yin Chu</a></p>
</footer>

<script src="index.js"></script>

</body>
</html>

最佳答案

这真的很容易。 (至少比cookie简单多了)

localStorage.setItem('key', 'value'); // to store data
var myData = localStorage.getItem('key') // to get data
localStorage.removeItem('key') // to remove one data
localStorage.clear() // to remove all data

keyvalue分别替换为数据键和要存储的数据。

关于javascript - 如何将输出存储在 localStorage 中?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/70729141/

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