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javascript - Jquery 字符串与正则表达式匹配不起作用

转载 作者:行者123 更新时间:2023-12-03 08:25:43 29 4
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想要搜索文本并获取匹配项数:

<!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 WARN 单词并使用 RegExp() 方法作为模式,但它不起作用。

最佳答案

两个问题:

  1. varpattern = new RegExp("/"+ text + "/g"); 更改为 varpattern = new RegExp(text, "g"); RegExp 期望标志用作第二个参数
  2. 选择器不正确。 $('测试').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>

关于javascript - Jquery 字符串与正则表达式匹配不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33561281/

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