如何根据输入字段中输入的数字乘以字符串(即“输入名称”)，并根据所述输出创建垂直编号列表。任何建议都会很棒!
示例:
- 你好名字
- 你好名字!
- 你好名字
- 你好名字!
- 你好名字
等等
我尝试过一些事情。循环似乎是合乎逻辑的答案，但我不确定如何实现它。我仍在学习 javascript 的过程中，所以并不是所有的事情都是立即显而易见的。
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width-device-width, initial-scale-1.0">
<meta http-equiv="X-UA-Compatible" content="ie-edge">
</head>
<body>
<div>
<label for="first-name">Frist Name!</label>
<input type="text" name="first-name-text" id="first-name-text" placeholder="Enter a name">
<br>
<br>
<label for="n-times">Number of times</label>
<input type="text" name="n-times-text" id="n-times-text" placeholder="Enter a number">
</div>
<div>
<p id="hello-message">Hello World!</p>
</div>
<br>
<div>
<button id="hello-button">Display Hello!</button>
<button id="reset-button">Reset</button>
</div>
<script src="script.js"></script>
</body>
</html>
JavaScript
let firstNameText = document.getElementById("first-name-text");
let helloMessage = document.getElementById("hello-message");
let nTimesText = document.getElementById("n-times-text")
function hideMessage( ) {
helloMessage.style.display = "none";
}
function showMessage() {
helloMessage.style.display = "";
}
function displaymessages(name) {
// let helloMessage = document.getElementById("hello-message")
helloMessage.innerText = "Hello " + name + "!";
// let goodbyeMessage = document.getElementById("goodbye-message")
// goodbyeMessage.innerText = "Goodbye " + name + "!";
showMessage();
}
hideMessage();
let helloButton = document.getElementById("hello-button");
helloButton.addEventListener('click', function() {
let firstNameText = document.getElementById("first-name-text");
displaymessages(firstNameText.value);
console.log('first name:' + firstNameText.value);
});
let resetButton = document.getElementById("reset-button");
resetButton.addEventListener('click', function() {
firstNameText.value = "";
nTimesText.value = "";
hideMessage();
});
最佳答案
您可以使用String.prototype.repeat()。
let helloButton = document.getElementById("hello-button");
helloButton.addEventListener('click', function() {
let firstNameText = document.getElementById("first-name-text");
displaymessages(firstNameText.value.repeat(+nTimesText.value));
console.log('first name:' + firstNameText.value);
});
关于javascript - 如何垂直列出字符串输出并相应地对其进行编号？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55979169/