javascript 如何显示随机文本每次当页面加载？

0yg35tkg 于 2023-01-16 发布在 Java

关注(0)|答案(2)|浏览(160)

我试着创建一个函数来在页面每次加载时显示随机文本。代码可以工作，但如何为“parrotFact”，“lionFact”和“rabbitFact”创建一个函数呢？
由于所有功能都相同，如何将3种功能合二为一？
我分享下面的代码：

<div id="parrotFact"></div>
<div id="lionFact"></div>
<div id="rabbitFact"></div>

// JS for parrotFact

function displayRandomMessage() {
            var parrotFact = [
                "Parrots can talk.",
                "Parrots love sunflower seeds.",
                "Parrots can make your day."
            ];

            var randomIndex = Math.floor(Math.random() * parrotFact.length);
            var randomMessage = parrotFact [randomIndex];

            var messageElement = document.getElementById("parrotFact");
            messageElement.innerHTML = randomMessage;
        }

        // Call the function when the page loads
        window.onload = displayRandomMessage;

// JS for lionFact

function displayRandomMessage() {
            var lionFact = [
                "Lion can't talk.",
                "Lion is a part of cat family.",
                "Lion is the King of the Jungle."
            ];

            var randomIndex = Math.floor(Math.random() * lionFact.length);
            var randomMessage = lionFact [randomIndex];

            var messageElement = document.getElementById("lionFact");
            messageElement.innerHTML = randomMessage;
        }

        // Call the function when the page loads
        window.onload = displayRandomMessage;

// JS for rabbitFact

function displayRandomMessage() {
            var rabbitFact = [
                "Rabbit can't talk.",
                "Rabbits are cute.",
                "Rabbits are small."
            ];

            var randomIndex = Math.floor(Math.random() * lionFact.length);
            var randomMessage = rabbitFact [randomIndex];

            var messageElement = document.getElementById("rabbitFact");
            messageElement.innerHTML = randomMessage;
        }

        // Call the function when the page loads
        window.onload = displayRandomMessage;

JavaScript

来源：https://stackoverflow.com/questions/75123454/how-to-display-random-text-everytime-when-page-loads

2条答案

按热度按时间

xxslljrj1#

如果您打算为每个事实类型使用单独的HTML元素，那么您可以这样做：

const allFacts = {
  "parrot": [
    "Parrots can talk.",
    "Parrots love sunflower seeds.",
    "Parrots can make your day."
  ],
  "lion": [
    "Lion can't talk.",
    "Lion is a part of cat family.",
    "Lion is the King of the Jungle."
  ],
  "rabbit": [
    "Rabbit can't talk.",
    "Rabbits are cute.",
    "Rabbits are small."
  ]
}

function displayRandomMessage(animalType) {
  var facts = allFacts[animalType]
  var randomIndex = Math.floor(Math.random() * facts.length);
  var randomMessage = facts[randomIndex];
  var messageElement = document.getElementById(animalType + "Fact");
  messageElement.innerHTML = randomMessage;
}

displayRandomMessage("lion")

将数组组合成一个对象，然后可以将希望看到的随机事实的动物类型传递给函数。
然而，如果你想一次为每种动物类型提供一个事实，那么你可以像这样迭代对象：

const allFacts = {
  "parrot": [
    "Parrots can talk.",
    "Parrots love sunflower seeds.",
    "Parrots can make your day."
  ],
  "lion": [
    "Lion can't talk.",
    "Lion is a part of cat family.",
    "Lion is the King of the Jungle."
  ],
  "rabbit": [
    "Rabbit can't talk.",
    "Rabbits are cute.",
    "Rabbits are small."
  ]
}

function displayRandomMessages() {
  for (var animalType in allFacts) {
    var facts = allFacts[animalType]
    var randomIndex = Math.floor(Math.random() * facts.length);
    var randomMessage = facts[randomIndex];
    var messageElement = document.getElementById(animalType + "Fact");
    messageElement.innerHTML = randomMessage;
  }
}

displayRandomMessages()

赞(0）回复(0）举报 2023-01-16

hvvq6cgz2#

考虑到您希望将页面上的所有内容与单个<div>合并

function displayRandomMessage() {
  var factData = [
    "Parrots can talk.",
    "Parrots love sunflower seeds.",
    "Parrots can make your day.",
    "Lion can't talk.",
    "Lion is a part of cat family.",
    "Lion is the King of the Jungle.",
    "Rabbit can't talk.",
    "Rabbits are cute.",
    "Rabbits are small."
  ];

  var randomIndex = Math.floor(Math.random() * factData.length);
  var randomMessage = factData[randomIndex];

  var messageElement = document.getElementById("factData");
  messageElement.innerHTML = randomMessage;
}

// Call the function when the page loads
window.onload = displayRandomMessage;

<div id="factData"></div>

考虑到您希望将页面上的所有内容与多个<div>合并
一个二个一个一个

赞(0）回复(0）举报 2023-01-16

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javascript 如何显示随机文本每次当页面加载？

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