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[英]How to on selected letter from alphabet show text for that letter? Vanilla Javascript
[英]How to print multi-line text letter by letter from JavaScript?
我想使用 JavaScript 一个字母一个字母地打印我的文本。 我尝试了以下答案https://stackoverflow.com/a/7265613/7920589 ,它在 jQuery 中,通过将其转换为纯 javascript。
let showText = function (target, message, index, interval) {
if (index < message.length) {
document.querySelector(target).innerText += message[index++];
setTimeout(function () { showText(target, message, index, interval); }, interval);
}
}
showText("#msg", "Hello this line is printing letter by letter\n hello this line too is printing letter by letter,", 0, 200);
我试过这段代码,但虽然它一个字母一个字母地打印消息,但它完全忽略了消息中的空格。
输出:
Hellothislineisprintingletterbyletter
hellothislinetooisprintingletterbyletter,
我尝试用innerHTML
和textContent
替换innerText
,但是新行转义字符\\n
不起作用,而是打印一个简单的空格而不是转到新行。
输出:
Hello this line is printing letter by letter hello this line too is printing letter by letter,
请帮我解决一下这个。
您可以将<code>
标签与textContent
和white-space: pre-wrap
结合使用:
let showText = function(target, message, index, interval) { if (index < message.length) { document.querySelector(target).textContent += message[index++]; setTimeout(function() { showText(target, message, index, interval); }, interval); } } showText("#msg", "Hello this line is printing letter by letter\\n hello this line too is printing letter by letter,", 0, 20);
code { white-space: pre-wrap }
<code id="msg"></code>
对某些CertainPerformance 建议的替代方法是对文本进行切片。
let showText = function(target, message, index, interval) { if (index < message.length) { document.querySelector(target).textContent = message.slice(0, index); setTimeout(function() { showText(target, message, index + 1, interval); }, interval); } } showText("#msg", "Hello this line is printing letter by letter\\n hello this line too is printing letter by letter,", 0, 20);
div { white-space: pre-wrap; }
<div id="msg"></div>
也许你应该尝试这种循环来逐个打印
<input type="text" id="input1">
<button onclick="his()">click</button>
和 js
function his() {
let input = document.getElementById("input1").value
for (let index of input) {
console.log(index)
}
}
我只是发现这种类型的循环,它的语法有点短。 也许这会有所帮助
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