如何使用jquery查找包含与前缀匹配的data- *属性的元素 [英] how do I find elements that contain a data-* attribute matching a prefix using jquery

问题描述

我想创建一个选择器来查找具有以字符串开头的属性的元素。此时，我假设这个选择器不存在。
我是否需要扩展选择器功能？ James Padolsey 扩展jQuery的选择器功能

I'm want to create a selector to find elements which have attributes starting with a string. At this point, I'm assuming this selector does not exist. Do I need to extend the selector capabilities? Extending jQuery’s selector capabilities by James Padolsey

我需要表达类似于包含前缀选择器[name | =value]的内容，但不是匹配value，而是需要匹配属性的名称，而不是属性的值。

I need to express something like the Attribute Contains Prefix Selector [name|="value"], but instead of matching "value", I need to match against the name of the attribute, and not the value of the attribute.

< tag data-plugin-option1 =val1data-plugin-option2 =val2/>

我想最终得到这样的语法：
$（'tag（：attr | = data-plugin）'）应该找到元素标记，因为它至少有一个以数据开头的元素-plugin

I'd like to end up with a syntax like this: $('tag(:attr|="data-plugin")') which should find the element tag because it has at least one element that starts with data-plugin

推荐答案

好吧，我想我的阅读方式不同了。

Well, I guess I'm reading your question differently.

我读它的方式，你想创建一个自定义选择器，选择具有给定属性名称（或该名称的开头）的元素。

The way I read it, you want to create a custom selector that selects elements that have a given attribute name (or the start of that name).

如果是这样，我认为您需要为每个元素迭代属性集合。

If so, I think you'd need to iterate of the attributes collection for each element.

DEMO： http://jsfiddle.net/GgmM7/

$.extend($.expr[':'],{
    attrNameStart: function(el,i,props) {

        var hasAttribute = false;

        $.each( el.attributes, function(i,attr) {
            if( attr.name.indexOf( props[3] ) !== -1 ) {
                hasAttribute = true;
                return false;  // to halt the iteration
            }
        });

        return hasAttribute;
    }
});

---

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$('img:attrNameStart(data-plugin)')

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