突出显示给出HTML和Xpath的时间 [英] Highlighting when HTML and Xpath is given
问题描述
给出HTML作为字符串，Xpath和偏移量.我需要强调这个词.
Given the HTML as a string, the Xpath and offsets. I need to highlight the word.
在以下情况下，我需要突出显示 Child 1
In the below case I need to highlight Child 1
HTML文本:
<html>
<body>
<h2>Children</h2>Joe has three kids:<br/>
<ul>
<li>
<a href="#">Child 1 name</a>
</li>
<li>kid2</li>
<li>kid3</li>
</ul>
</body>
</html>
XPATH为:/html/body/ul/li [1]/a [1]
偏移量: 0,7
渲染-我在我的应用中使用 react .以下是我到目前为止所做的.
Render - I am using react in my app.
The below is what I have done so far.
public render(){
let htmlText = //The string above
let doc = new DOMParser().parseFromString(htmlRender,'text/html');
let ele = doc.evaluate("/html/body/ul/li[1]/a[1]", doc, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null); //This gives the node itself
let spanNode = document.createElement("span");
spanNode.className = "highlight";
spanNode.appendChild(ele);
// Wrapping the above node in a span class will add the highlights to that div
//At this point I don't know how to append this span to the HTML String
return(
<h5> Display html data </h5>
<div dangerouslySetInnerHTML={{__html: htmlText}} />
)
我想避免使用jquery.如果可能的话，想用Javascript做(也可以做！)！
I want to avoid using jquery. Want to do in Javascript(React too) if possible!
因此，如果您注意到 Render 函数，它正在使用 dangerouslySetHTML .我的问题是我无法操纵呈现的字符串.
So if you notice the Render function it is using dangerouslySetHTML.
My problem is I am not able manipulate that string which is rendered.
推荐答案
这就是我最终要做的事情.
This is what I ended up doing.
public render(){
let htmlText = //The string above
let doc = new DOMParser().parseFromString(htmlRender,'text/html');
let xpathNode = doc.evaluate("/html/body/ul/li[1]/a[1]", doc, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
const highlightedNode = xpathNode.singleNodeValue.innerText;
const textValuePrev = highlightedNode.slice(0, char_start);
const textValueAfter = highlightedNode.slice(char_end, highlightedNode.length);
xpathNode.singleNodeValue.innerHTML = `${textValuePrev}
<span class='pt-tag'>
${highlightedNode.slice(char_start, char_end)}
</span> ${textValueAfter}`;
return(
<h5> Display html data </h5>
<div dangerouslySetInnerHTML={{__html: doc.body.outerHTML}} />
)
这篇关于突出显示给出HTML和Xpath的时间的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
