CSS选择器对属性不区分大小写 [英] CSS selector case insensitive for attributes

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本文介绍了CSS选择器对属性不区分大小写的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

如果我有一个HTML元素< input type =submitvalue =Search/> css选择器需要区分大小写: p>

输入[value ='Search'] 匹配



input [value ='search'] 不匹配



我使用 Selenium 2 Jquery ,因此欢迎使用两者的答案。

解决方案

  $(':input [name]')。filter(function(){
return this.value.toLowerCase )=='search';
});

jsFiddle



您也可以制作自定义选择器...

  $ expr [':']。valueCaseInsensitive = function(node,stackIndex,properties){
return node.value.toLowerCase()== properties [3]
};

var searchInputs = $(':input:valueCaseInsensitive(Search)');

jsFiddle



自定义选择器有点过分,如果这一次,但如果你需要在你的应用程序中使用它多次,它可能是一个好



更新




对于任何属性?


当然,请查看以下示例。这是一个有点复杂(语法如:input [value:toLowerCase =search] 可能更直观),但它的工作原理:)

  $。expr [':'] attrCaseInsensitive = function(node,stackIndex,properties){
var args = properties [3]。 split(',')。map(function(arg){
return arg.replace(/ ^ \s * ['] | ['] \s * $ / g,'');
});
return $(node).attr(args [0])。toLowerCase()== args [1];
};

var searchInputs = $('input:attrCaseInsensitive(value,search)');

jsFiddle



你可以使用 eval()这样更舒适(而且你不会不小心执行你在你的选择器中放置的任何代码)。



相反,我拆分分隔符,然后剥离空格,'请注意,引用内部的不会按字面意思来处理,没有理由应该在字面上要求,但你可以随时对这种可能性进行编码, 。)



我不认为 map() 具有最佳的浏览器支持,因此您可以显式地遍历 args 阵列或增强数组 object


If I have an HTML element <input type="submit" value="Search" /> a css selector needs to be case-sensitive:

input[value='Search'] matches

input[value='search'] does not match

I need a solution where the case-insensitive approach works too. I am using Selenium 2 and Jquery, so answers for both are welcome.

解决方案

$(':input[name]').filter(function() {
   return this.value.toLowerCase() == 'search';
});

jsFiddle.

You could also make a custom selector...

$.expr[':'].valueCaseInsensitive = function(node, stackIndex, properties){
     return node.value.toLowerCase() == properties[3];
};

var searchInputs = $(':input:valueCaseInsensitive("Search")');

jsFiddle.

The custom selector is a bit of overkill if doing this once, but if you need to use it many times in your application, it may be a good idea.

Update

Is it possible to have that kind of custom selector for any attribute?

Sure, check out the following example. It's a little convoluted (syntax such as :input[value:toLowerCase="search"] may have been more intuitive), but it works :)

$.expr[':'].attrCaseInsensitive = function(node, stackIndex, properties){
    var args = properties[3].split(',').map(function(arg) {
        return arg.replace(/^\s*["']|["']\s*$/g, '');  
    });
    return $(node).attr(args[0]).toLowerCase() == args[1];
};

var searchInputs = $('input:attrCaseInsensitive(value, "search")');

jsFiddle.

You could probably use eval() to make that string an array, but I find doing it this way more comfortable (and you won't accidentally execute any code you place in your selector).

Instead, I am splitting the string on , delimiter, and then stripping whitespace, ' and " either side of each array member. Note that a , inside a quote won't be treated literally. There is no reason one should be required literally, but you could always code against this possibility. I'll leave that up to you. :)

I don't think map() has the best browser support, so you can explictly iterate over the args array or augment the Array object.

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