:contains()不返回预期的节点 [英] :contains() does not return the expected nodes

问题描述

请考虑以下代码:

// @include     /(^https?:\/\/www\.|^https?:\/\/)google\.com(\.|\/).*/
// @include     /(^https?:\/\/www\.|^https?:\/\/)stackoverflow\.com\/.*/
// @include     /(^https?:\/\/www\.|^https?:\/\/)userscripts-mirror\.org\/.*/
// @include     http://wiki.greasespot.net/*
// @version     1.0
// @require     https://code.jquery.com/jquery-2.1.1.min.js
// @grant       GM_addStyle


$ ( 'body:contains("serscripts.org")').each ( function ()  {

var results = $(this);
var text = results.text();
console.log(text);
text = text.replace( /serscripts\.org/ig, "serscripts-mirror.org" );
text = text.replace( /(:8080|%3A8080)/ig, "");
    //results.text ( text );

} );

我希望返回的内容应该只是包含该字符串的元素，但是控制台上的结果是正文的所有文本.

I expected the return should be just the elements containing that string, but the result on the console is all the text of the body.

考虑此页面在以下行:

// @updateURL       https://userscripts.org/scripts/so...

我要更改它.

或者这一个:

// @require http://userscripts.org/scripts/source...

我也想改变.

应检查标记之间的所有单词是否为字符串，并仅返回具有该单词的单词.

All words between tags should be checked for the string, and return only the ones that have it.

最合适的选择器是什么?

What is the right selector for this?

注意:
<a></a>之间的链接属性和文本已经使用类似的.each ( function )进行了更改.

Note:
Link attributes and text between <a></a> are already changed using a similar .each ( function ).

推荐答案

:contains完全返回了预期的结果.从规范:

:contains is returning exactly what is expected. From the spec:

匹配的文本可以直接出现在所选元素中，该元素的任何后裔或它们的组合中.

The matching text can appear directly within the selected element, in any of that element's descendants, or a combination thereof.

---

通常，要替换，环绕或突出显示网页上的文本术语，您需要在各个TEXT_NODE级别上进行操作.其他还有可能造成垃圾回收的风险:URL，ID，事件处理程序等.

---

In general, to replace, wrap or highlight text terms on a web page, you need to work at the individual TEXT_NODE level. Anything else risks trashing: URL's, id's, event handler's, etc.

您可以为此使用 Tree Walker :

var txtWalker   = document.createTreeWalker (
    document.body,
    NodeFilter.SHOW_TEXT,
    {   acceptNode: function (node) {
            //-- Skip whitespace-only nodes
            if (node.nodeValue.trim() )
                return NodeFilter.FILTER_ACCEPT;

            return NodeFilter.FILTER_SKIP;
        }
    },
    false
);
var txtNode     = null;

while (txtNode  = txtWalker.nextNode () ) {
    var oldTxt  = txtNode.nodeValue;
    var newTxt  = oldTxt.replace (/serscripts\.org/ig, "serscripts-mirror.org");
    newTxt      = newTxt.replace (/(:8080|%3A8080)/ig, "");

    txtNode.nodeValue = newTxt;
}

这将安全地处理页面上的所有内容，除了href，src等HTML属性.

this will safely take care of everything on the page, except for HTML attributes like href, src, etc.

如果您希望更改它们，请使用单独的，有针对性的.each ()代码-就像您说的那样-但不要更改<a></a>之间的文本，因为树行者已经完成了此操作.

If you wish to change those, use separate, targeted .each () code -- like you said you were doing -- but do not change the text between <a></a> as that will already have been done by the tree walker.

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