如何使用jQuery从id获取html

I have simple list:

我有简单的清单:

<ul id="tabs_nav">
    <li id="t_00">data</li>
    <li id="t_01">data</li>
    <li id="t_02">data</li>
    <li id="t_03">data</li>
</ul>

Now: How do I get the html of the first element, depending on what is ID. I would add that all of ID's change dynamically with the click of the button. This is my code:

现在:我如何获取第一个元素的html,具体取决于ID。我想补充说,只需点击按钮,所有ID都会动态变化。这是我的代码:

btn.on('click',function(){
    var ladder_nav_tabs = $('#tabs_nav'),
        first_ladder_element_inset_id = ladder_nav_tabs.find('li').first().attr('id'),
        first_ladder_element_inset_html = ladder_nav_tabs.find(first_ladder_element_inset_id).html();
    console.log(first_ladder_element_inset_html);
});

Thx for help.

谢谢你的帮助。

4 个解决方案

#1

Seems you are missing the id selector #.

好像你错过了id选择器#。

You are trying to get the html from the selector:

您正在尝试从选择器获取html:

ladder_nav_tabs.find(first_ladder_element_inset_id).html();

This won't work as an id selector needs the #. Like this:

这不会起作用,因为id选择器需要#。喜欢这个:

ladder_nav_tabs.find("#" + first_ladder_element_inset_id).html();

Try the following to fix your code:

请尝试以下操作来修复您的代码:

btn.on('click',function(){
    var ladder_nav_tabs = $('#tabs_nav'),
        first_ladder_element_inset_id = ladder_nav_tabs.find('li').first().attr('id'),
        first_ladder_element_inset_html = ladder_nav_tabs.find("#" + first_ladder_element_inset_id).html();
    console.log(first_ladder_element_inset_html);
});

DEMO - Updating to valid id selector syntax

DEMO - 更新为有效的id选择器语法

Alternatively you could shorten your code using jQuery's eq, similar to this:

或者,您可以使用jQuery的eq缩短代码,类似于:

btn.on('click',function(){
    var theHtml = $('#tabs_nav li').eq(0).html();
    console.log(theHTML);
});

#2

Don't use jQuery purely as a selector engine:

不要将jQuery纯粹用作选择器引擎:

btn.onclick = function() {
  console.log(document.getElementById('tabs_nav').children[0].innerHTML);
};

#3

Check out the jQuery first-child selector. Specifically:

查看jQuery第一个子选择器。特别:

btn.on('click',function(){
    var first_child = $('#tabs_nav li:first-child');
    var first_child_html = first_child.html();
});

#4

Try this:

btn.on('click',function(){
    var ladder_nav_tabs = $('#tabs_nav'),
        first_ladder_element_inset_id = ladder_nav_tabs.find('li:first-child').attr('id'),
        first_ladder_element_inset_html = ladder_nav_tabs.find(first_ladder_element_inset_id).html();
    console.log(first_ladder_element_inset_html);
});

You have tou use :first-child

你可以使用:第一个孩子

#1