如何在不立即执行“点击”功能的情况下在我的文本区域中具有“必需”？
我试着把我的文本区域放进去。但它不起作用，因为我的函数立即执行。我怎样才能要求先填写我的文本区域，而不立即执行点击？这是我的代码：requiredonclick="displayText()"
网页：
<!DOCTYPE html>
<html>
<head>
<title>Word Counter</title>
</head>
<body>
<div id="input-page">
<h1>Word Counter</h1>
<form action="">
<textarea id="inputted-text" type="text" rows="22" cols="60"></textarea>
<br />
</form>
<button onclick="displayText()">COUNT</button>
</div>
<div id="count-page" style="display: none;">
<h1>Your Text:</h1>
<p id=display-user-text></p>
<div>
<h1 id="word-count">Count: </h1>
</div>
</div>
</body>
<script src="app.js"></script>
</html>
脚本：
const displayText = () => {
const inputPage = document.getElementById("input-page");
const countPage = document.getElementById("count-page");
inputPage.style.display = "none";
// get user's inputted text
const inputtedText = document.getElementById("inputted-text");
const inputtedTextValue = inputtedText.value;
// diplay user's inputted text
document.getElementById("display-user-text").innerText = inputtedTextValue;
countPage.style.display = "block";
console.log(countWords(inputtedTextValue));
};
const countWords = (str) => {
return str.split(" ").length;
};
const renderWordCount = () => {
document.getElementById("word-count") = wordCount;
};
奖励：除了标题之外，我还可以显示我的单词计数，而不仅仅是在我的控制台上显示它？Count:
慕少森1回答
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眼眸繁星
您希望系统在文本区域为空时发出警告。您可以通过将 If-else 条件表达式添加到代码中来执行此操作。const displayText = () => { const inputPage = document.getElementById("input-page"); const countPage = document.getElementById("count-page"); const inputtedText = document.getElementById("inputted-text"); const inputtedTextValue = inputtedText.value; if (inputtedText.value !== "") { // normal flow will continue if the text-area is not empty inputPage.style.display = "none"; document.getElementById("display-user-text").innerText = inputtedTextValue; countPage.style.display = "block"; } else { // if the text-area is empty, it will issue a warning. alert("this area required") } console.log(countWords(inputtedTextValue));};const countWords = (str) => { return str.split(" ").length;};const renderWordCount = () => { document.getElementById("word-count") = wordCount;};<div id="input-page"> <h1>Word Counter</h1> <form action=""> <textarea id="inputted-text" type="text" rows="22" cols="60"></textarea> <br /> </form> <button onclick="displayText()">COUNT</button></div><div id="count-page" style="display: none;"> <h1>Your Text:</h1> <p id="display-user-text"></p> <div> <h1 id="word-count">Count: </h1> </div></div>
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相关分类
JavaScript