javascript - 如何将元素的每个单词包装在 span 标签中？

Question

$("div.date")
    .contents()
    .filter(
        function(){
            return this.nodeType != 1; 
        })
    .wrap("<span/>");

我是新手，我认为代码可以解决问题，但它将所有内容都包装在 <span> 中像这样:

<div class='date'><span> 2011 年 12 月 22 日 </span></div>

它应该是这样的:

<div class='date'>
  <span>Dec</span>
  <span>22,</span>
  <span>2011</span>
</div>

Answer 1

您不需要 jQuery 来完成这个简单的任务。 String.prototype.replace 和正则表达式应该可以解决问题。

我只是制作了一些简单的实用函数，用于包装字母、单词和行:

/**
 * Wraps a string around each character/letter
 *
 * @param {string} str The string to transform
 * @param {string} tmpl Template that gets interpolated
 * @returns {string} The given input as splitted by chars/letters
 */
function wrapChars(str, tmpl) {
  return str.replace(/\w/g, tmpl || "<span>$&</span>");
}

/**
 * Wraps a string around each word
 *
 * @param {string} str The string to transform
 * @param {string} tmpl Template that gets interpolated
 * @returns {string} The given input splitted by words
 */
function wrapWords(str, tmpl) {
  return str.replace(/\w+/g, tmpl || "<span>$&</span>");
}

/**
 * Wraps a string around each line
 *
 * @param {string} str The string to transform
 * @param {string} tmpl Template that gets interpolated
 * @returns {string} The given input splitted by lines
 */
function wrapLines(str, tmpl) {
  return str.replace(/.+$/gm, tmpl || "<span>$&</span>");
}

用法非常简单。只需传入要包装的字符串作为第一个参数。如果您需要自定义标记，请将其作为第二个参数传入，而 $& 将替换为每个字符/单词/行。

var str = "Foo isn't equal\nto bar.";
wrapChars(str); // => "<span>F</span><span>o</span><span>o</span> <span>i</span><span>s</span><span>n</span>'<span>t</span> <span>e</span><span>q</span><span>u</span><span>a</span><span>l</span> <span>t</span><span>o</span> <span>b</span><span>a</span><span>r</span>."
wrapWords(str); // => "<span>Foo</span> <span>isn</span>'<span>t</span> <span>equal</span> <span>to</span> <span>bar</span>."
wrapLines(str); // => "<span>Foo isn't equal</span> <span>to bar.</span>"