jQuery element.text()错误“不是函数"；当我使用elements数组时 [英] Jquery element.text() error "is not a function" when I use elements array

问题描述

我正在阅读一个XML文件，其中有一些p标签，并且我想获取每个元素文本"element.find()".但是我收到了这个错误".text不是函数".

I am reading a XML file in which I have some p tags, and I want to to get each element text "element.find()". But I got this error ".text is not a function".

这是我使用的代码:

            $.ajax({
                type: 'GET',
                url: YQLurl,
                data: {
                    key: "value"
                },
                dataType: "xml",
                success: function (reciviedXml){

                    for(var i = 0 ; i < $(reciviedXml).find('p').length;i++)
                    {
                      var paragraph= $(reciviedXml).find('p')[i].text(); 
                    }   
                });

我认为我的数组不是元素数组，或者至少jquery无法将其理解为元素列表，我该怎么办?

I think my array is not an array of elements, or at least jquery can not unserestand it as elements list, what should I do?

推荐答案

这显然将不起作用，因为$(reciviedXml).find('p')[i]将返回本机DOM Element，并且Element上没有text方法的界面.如果您执行$(reciviedXml).find('p')[i].textContent;，您的代码应该可以工作，尽管这样做效率极低.

That will obviously won't work as $(reciviedXml).find('p')[i] will return a native DOM Element and there is no text method on the Element's interface. Your code should work if you do $(reciviedXml).find('p')[i].textContent; although it would be extremely inefficient.

这是一种更好的方法:

$(reciviedXml).find('p').each(function () {
    var paragraph = $(this).text();

    //do something useful with paragraph
    console.log(paragraph);
});

我只想要第3个标签文本，它会给我错误

I just want the 3rd tag text it gives me the error

您也可以执行$(reciviedXml).find('p:nth-child(3)').text()直接获取第三段的文本.

You can also do $(reciviedXml).find('p:nth-child(3)').text() to get the text of the third paragraph directly.

您可能也根本不使用jQuery:

You may also not use jQuery at all:

var htmlString = '<p>1</p><p>2</p><p>3</p>';

var text = new DOMParser()
    .parseFromString(htmlString, 'text/html')
    .querySelector('p:nth-child(3)')
    .textContent;

alert(text);

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