jquery 正则表达式选择器
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jquery regex selector
提问by Nico AD
I want to select some html elements with name starting with btn (btn1, btn2..)
我想选择一些名称以 btn (btn1, btn2..) 开头的 html 元素
what is the most efficiant way to do that
最有效的方法是什么
I try http://james.padolsey.com/javascript/regex-selector-for-jquery/but dont manage to make it work
我尝试http://james.padolsey.com/javascript/regex-selector-for-jquery/但没有设法让它工作
$(':regex(class,btn[0-9]').hover( function(){
// not selecting any "btn" class
}
回答by Eli
If you want to select all elements that have a class
attribute that starts with the word btn
:
如果要选择class
具有以单词开头的属性的所有元素btn
:
$( '[class^=btn]' )
If you want to use the name
attribute instead, just swap out the attribute:
如果您想改用该name
属性,只需换出该属性:
$( '[name^=btn]' )
Using the attribute value starts-with selector: http://api.jquery.com/attribute-starts-with-selector/
使用属性值开始选择器:http: //api.jquery.com/attribute-starts-with-selector/
回答by Code Maverick
What you are doing is selecting all elements with the class of btnX where X could be 0-9.
您正在做的是选择所有具有 btnX 类的元素,其中 X 可以是 0-9。
To do this with the name attribute starting with "btn" you need to use:
要使用以“btn”开头的 name 属性执行此操作,您需要使用:
$(':regex(name,^btn)').hover(function() { ... }, function() { ... });
-- EDIT to include working jsFiddle demo--
--编辑以包括工作 jsFiddle 演示--
Also, don't forget to put this on your page:
另外,不要忘记把它放在你的页面上:
jQuery.expr[':'].regex = function(elem, index, match) {
var matchParams = match[3].split(','),
validLabels = /^(data|css):/,
attr = {
method: matchParams[0].match(validLabels) ?
matchParams[0].split(':')[0] : 'attr',
property: matchParams.shift().replace(validLabels,'')
},
regexFlags = 'ig',
regex = new RegExp(matchParams.join('').replace(/^\s+|\s+$/g,''), regexFlags);
return regex.test(jQuery(elem)[attr.method](attr.property));
}
回答by Talljoe
I doubt regex is the most efficient way to do it, but did you add the regex selector to your code? :regex
is not a built-in selector so you need to include the snippet at the top of your article in your script.
我怀疑 regex 是最有效的方法,但是您是否将 regex 选择器添加到您的代码中? :regex
不是内置选择器,因此您需要在脚本中包含文章顶部的代码段。