Jquery字符串与正则表达式匹配不起作用

Jquery string match with regex not working

本文关键字：不起作用 正则表达式 字符串 Jquery      更新时间：2023-09-26

想要搜索文本并获得匹配数：

<!DOCTYPE html>
<html>
<head>
    <script type="text/javascript" src="http://code.jquery.com/jquery-1.4.4.min.js"></script>
    <script type="text/javascript">
        function searchText(text) {
            var pattern = new RegExp("/" + text + "/g");
            var totalMatchCount = ($('Test').text().match(pattern) || []).length;
            alert(totalMatchCount)
        }
    </script>
</head>
<body>
    <div id="Test">
        2015-11-05 22:01:00,062                      WARN  [] (Thread-1169 (HornetQ-client-global-threads-643998766)) The license you are using has expired or is bad.  value: -5
        2015-11-05 22:02:00,026                      WARN  [] (Thread-1165 (-client-global-threads-643998766)) The license you are using has expired or is bad.  value: -5
        2015-11-05 22:03:00,049                      WARN  [] (Thread-1180 (-client-global-threads-643998766)) The license you are using has expired or is bad.  value: -5
    </div>
    <button onclick="searchText('WARN')">Search</button>
</body>
</html>

我正在搜索CCD_ 1单词，并使用CCD_，但它不起作用。

两个问题：

  1. 将var pattern = new RegExp("/" + text + "/g");更改为var pattern = new RegExp(text, "g"); RegExp，期望将标志用作第二个参数
  2. 选择器不正确。$('Test').text().。未使用id选择器$('#Test').text().

function searchText(text) {
  var pattern = new RegExp(text, "g");
  var totalMatchCount = ($('#Test').text().match(pattern) || []).length;
  console.log(totalMatchCount);
  document.getElementById('result').innerHTML = JSON.stringify($('#Test').text().match(pattern), 0, 4);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="Test">
  2015-11-05 22:01:00,062 WARN [dms.framework.licensing.LicenseManager] (Thread-1169 (HornetQ-client-global-threads-643998766)) The license you are using has expired or is bad. value: -5 2015-11-05 22:02:00,026 WARN [dms.framework.licensing.LicenseManager]
  (Thread-1165 (HornetQ-client-global-threads-643998766)) The license you are using has expired or is bad. value: -5 2015-11-05 22:03:00,049 WARN [dms.framework.licensing.LicenseManager] (Thread-1180 (HornetQ-client-global-threads-643998766)) The license
  you are using has expired or is bad. value: -5 2015-11-05 22:04:00,029
</div>
<button onclick="searchText('WARN')">Search</button>
<hr />
<pre id="result"></pre>

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