我如何能找到DIV与某些文本?例如:
<div>
SomeText, text continues.
</div>
试图使用这样的东西:
var text = document.querySelector('div[SomeText*]').innerTEXT;
alert(text);
当然,这是行不通的。我该怎么做呢?
我如何能找到DIV与某些文本?例如:
<div>
SomeText, text continues.
</div>
试图使用这样的东西:
var text = document.querySelector('div[SomeText*]').innerTEXT;
alert(text);
当然,这是行不通的。我该怎么做呢?
当前回答
下面是XPath方法,但是使用了最少的XPath术语。
基于元素属性值的常规选择(用于比较):
// for matching <element class="foo bar baz">...</element> by 'bar'
var things = document.querySelectorAll('[class*="bar"]');
for (var i = 0; i < things.length; i++) {
things[i].style.outline = '1px solid red';
}
基于元素内文本的XPath选择。
// for matching <element>foo bar baz</element> by 'bar'
var things = document.evaluate('//*[contains(text(),"bar")]',document,null,XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,null);
for (var i = 0; i < things.snapshotLength; i++) {
things.snapshotItem(i).style.outline = '1px solid red';
}
这里是不区分大小写的,因为文本更不稳定:
// for matching <element>foo bar baz</element> by 'bar' case-insensitively
var things = document.evaluate('//*[contains(translate(text(),"ABCDEFGHIJKLMNOPQRSTUVWXYZ","abcdefghijklmnopqrstuvwxyz"),"bar")]',document,null,XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,null);
for (var i = 0; i < things.snapshotLength; i++) {
things.snapshotItem(i).style.outline = '1px solid red';
}
其他回答
该解决方案实现如下功能:
Uses the ES6 spread operator to convert the NodeList of all divs to an array. Provides output if the div contains the query string, not just if it exactly equals the query string (which happens for some of the other answers). e.g. It should provide output not just for 'SomeText' but also for 'SomeText, text continues'. Outputs the entire div contents, not just the query string. e.g. For 'SomeText, text continues' it should output that whole string, not just 'SomeText'. Allows for multiple divs to contain the string, not just a single div.
[…document.querySelectorAll('div')] //获取数组中所有div .map(div => div. innerhtml) //获取它们的内容 .filter(txt => txt.includes('SomeText')) //只保留包含查询的内容 .forEach(txt => console.log(txt));//输出这些的全部内容 <div> . SomeText, text continue .</div> . SomeText, text continue <div>不在这个div中 这里是更多的SomeText.</div> .
我也有类似的问题。
函数返回包含arg文本的所有元素。
这对我来说很管用:
function getElementsByText(document, str, tag = '*') {
return [...document.querySelectorAll(tag)]
.filter(
el => (el.text && el.text.includes(str))
|| (el.children.length === 0 && el.outerText && el.outerText.includes(str)))
}
您最好看看是否有您正在查询的div的父元素。如果是,获取父元素并执行一个element. queryselectorall ("div")。获得nodeList后,在innerText属性上应用一个过滤器。假设我们正在查询的div的父元素的id为container。通常,你可以直接从id访问container,但让我们以正确的方式来做。
var conty = document.getElementById("container"),
divs = conty.querySelectorAll("div"),
myDiv = [...divs].filter(e => e.innerText == "SomeText");
就是这样。
如果你不想使用jquery或类似的东西,那么你可以试试这个:
function findByText(rootElement, text){
var filter = {
acceptNode: function(node){
// look for nodes that are text_nodes and include the following string.
if(node.nodeType === document.TEXT_NODE && node.nodeValue.includes(text)){
return NodeFilter.FILTER_ACCEPT;
}
return NodeFilter.FILTER_REJECT;
}
}
var nodes = [];
var walker = document.createTreeWalker(rootElement, NodeFilter.SHOW_TEXT, filter, false);
while(walker.nextNode()){
//give me the element containing the node
nodes.push(walker.currentNode.parentNode);
}
return nodes;
}
//call it like
var nodes = findByText(document.body,'SomeText');
//then do what you will with nodes[];
for(var i = 0; i < nodes.length; i++){
//do something with nodes[i]
}
在数组中拥有包含文本的节点后,就可以对它们进行操作。比如提醒每个人或打印到控制台。需要注意的是,这可能并不一定会抓取div本身,这将抓取拥有您正在寻找的文本的textnode的父节点。
使用XPath和document.evaluate(),并确保使用text()而不是。为contains()参数,否则你将匹配整个HTML,或最外层的div元素。
var headings = document.evaluate("//h1[contains(text(), 'Hello')]", document, null, XPathResult.ANY_TYPE, null );
或者忽略前导和尾随空格
var headings = document.evaluate("//h1[contains(normalize-space(text()), 'Hello')]", document, null, XPathResult.ANY_TYPE, null );
或匹配所有标签类型(div, h1, p等)
var headings = document.evaluate("//*[contains(text(), 'Hello')]", document, null, XPathResult.ANY_TYPE, null );
然后迭代
let thisHeading;
while(thisHeading = headings.iterateNext()){
// thisHeading contains matched node
}