[英]Split sentence into letters and add dynamic class (position of that letter) to it [ javascript, regex ]
我正在嘗試將一個句子/單詞分成單獨的字母,並且能夠使用下面的代碼來實現。
var textWrapper = document.getElementById("heading"); textWrapper.innerHTML = textWrapper.textContent.replace(/\S/g, "<span class='letter'>$&</span>");
<h1 class="heading" id="heading"> Hello! </h1>
輸入
<h1> Hello! </h1>
我從中得到什么
<h1>
<span class="letter">H</span>
<span class="letter">e</span>
<span class="letter">l</span>
<span class="letter">l</span>
<span class="letter">o</span>
<span class="letter">!</span>
</h1>
我想要的是
<h1>
<span class="letter-1">H</span>
<span class="letter-2">e</span>
<span class="letter-3">l</span>
<span class="letter-4">l</span>
<span class="letter-5">o</span>
<span class="letter-6">!</span>
</h1>
我能做些什么來實現這一目標?
textWrapper.innerHTML = textWrapper.textContent.replace(/\S/g, "<span class='letter-{what should I do here?}'>$&</span>");
如果這種方式不可能,我可以通過其他方式實現這一目標。
您還必須使用某種循環來添加字符索引
var textWrapper = document.getElementById( "heading" ); // `<span class='letter-${++index}'>$&</span>` const text = textWrapper.textContent.trim(); textWrapper.innerHTML = ""; text.split("").forEach((char, i) => { const span = document.createElement("span"); span.classList.add(`letter-${i + 1}`); span.textContent = char; textWrapper.appendChild(span); })
<h1 class="heading" id="heading"> Hello! </h1>
如果您真的想為此使用正則表達式,您可以將回調傳遞給replace()
並訪問整個字符串中匹配項的match
項和offset
。
var textWrapper = document.getElementById('heading'); textWrapper.innerHTML = textWrapper.textContent.replace( /\S/g, (match, offset) => `<span class='letter_${offset}'>${match}</span>` ); console.log(textWrapper.outerHTML);
<h1 class="heading" id="heading"> Hello! </h1>
如果您不想依賴offset
而是想要一個受控計數器,您可以增加自己的計數器,這里使用閉包
((c)=>(match) => `<span class='letter_${c++}'>${match}</span>`)(1)
var textWrapper = document.getElementById('heading'); textWrapper.innerHTML = textWrapper.textContent.replace( /\S/g, ((c) => (match) => `<span class='letter_${c++}'>${match}</span>`)(1) ); console.log(textWrapper.outerHTML);
<h1 class="heading" id="heading"> Hello! </h1>
我對正則表達式的了解為零,所以我會怎么做
const heading = document.getElementById("heading");
const letters = heading.innerText.split("").map((letter, index) => {
const span = document.createElement("span");
span.innerText = letter;
span.classList.add("letter-" + (index + 1));
return span;
});
heading.innerHTML = "";
letters.forEach((span) => heading.appendChild(span));
您可以測試此代碼:
var content = document.getElementById('heading').innerHTML;
content = content.toString();
content = content.split();
document.getElementById('heading').innerHTML = '';
var cpt = 1;
for (let i = 0; i < content.length; i++) {
const element = content[i];
document.getElementById('heading').appendChild("<span class='letter-"+cpt+"'>"+element +"</span>");
cpt++;
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.