[英]Add a span tag inside p after certain amount of characters
假設您的HTML有以下代碼:
<div class="contentBox">
<p>I have some content that is good to read</p>
</div>
但是,您想在一定數量的字符之后添加一個span標記,比如說26個字符,該字符就在單詞“ that”之后。 結果將如下所示:
<div class="contentBox">
<p>I have some content that<span> is good to read</span></p>
</div>
它必須在一定數量的字符之后,因為該段落會不時更改。
要設置span
后,請設置字符數。 獲取p
元素的文本。 從開始直到字符數量的子字符串,添加span
,繼續其余部分並添加close span
嘗試:
var after=26;
var html = $(".contentBox p").html();
html = html.substring(0, after) + "<span>" + html.substring(after)+"</span>";
$(".contentBox p").html(html);
String.prototype.insertTextAtIndices = function (text) {
return this.replace(/./g, function (char, index) {
return text[index] ? text[index] + char : char;
});
};
//usage
var range = {
25: "<span style='color:red'>",
40: "</span>"
};
document.getElementsByTagName("p")[0].innerHTML = document.getElementsByTagName("p")[0].innerHTML.insertTextAtIndices(range);
您可以使用JavaScript的substr
方法 。
function addSpan($elems) { $elems.each(function() { var $elem = $(this), text = $elem.text(); if (text.length <= 25) return; var start = text.substr(0, 25), // "I have some content that " end = text.substr(25, text.length); // "is good to read" $elem.html(start + '<span>' + end + '</span>'); }); } addSpan($('.contentBox').find('p'));
span { color: #f00; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <div class="contentBox"> <p>I have some content that is good to read</p> </div> <div class="contentBox"> <p>I have some content that is good to read and this is a much longer string!</p> </div>
試試這個:使用substring()
獲取字符串的第一部分和第二部分,並使用span
元素修改文本以將其放入p
標簽的html
中。
下面的函數將迭代contentBox
div下的所有p
,但是如果僅定位一個div,則可以不使用.each()
$(function(){
$('.contentBox p').each(function(){
var text = $(this).text();
var first = text.substring(0,26);
var second = text.substring(26,text.length);
$(this).html(first + '<span>' + second + '</span>');
});
});
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