我想将文本作为变量值传递给 javascript,以便突出显示相关内容。
例如: 在 HTML 中:
<p id="sentence" >a paragraph </p>
<p id="content"> And this here is inside a paragraph , about paragliders. happy ending.</p>
在 CSS 中:
.highlighted { background:yellow }
在 JavaScript 中:
var word= document.getElementById('sentence').value;
var root=document.getElementById('content').value;
function highlightWord(root,word){
textNodesUnder(root).forEach(highlightWords);
function textNodesUnder(root){
var walk=document.createTreeWalker(root,NodeFilter.SHOW_TEXT,null,false),
text=[], node;
while(node=walk.nextNode()) text.push(node);
return text;
}
function highlightWords(n){
for (var i; (i=n.nodeValue.indexOf(word,i)) > -1; n=after){
var after = n.splitText(i+word.length);
var highlighted = n.splitText(i);
var span = document.createElement('span');
span.className = 'highlighted';
span.appendChild(highlighted);
after.parentNode.insertBefore(span,after);
}
}
}
我还有一个问题是如何循环函数以便突出显示多个句子???非常感谢!
更新:在 html/jsp 中: https://jsfiddle.net/bob90937/2yw3s376/如何改善这一点。以便可以突出显示多个句子?????
最佳答案
稍微修改了您的代码。还使用 JQuery 轻松读取段落值:
$(document).ready(function() {
var wordText = $('#sentence').text();
var rootText = $('#content').text();
var rootNode = document.getElementById('content');
highlightWord(rootText, wordText);
function highlightWord(rootText, wordText) {
textNodesUnder(rootNode).forEach(highlightWords);
function textNodesUnder(rootNode) {
var walk = document.createTreeWalker(rootNode, NodeFilter.SHOW_TEXT, null, false);
var text = [],
node;
while (node = walk.nextNode()) text.push(node);
return text;
}
function highlightWords(n) {
for (var i;
(i = n.nodeValue.indexOf(wordText, i)) > -1; n = after) {
var after = n.splitText(i + wordText.length);
var highlighted = n.splitText(i);
var span = document.createElement('span');
span.className = 'highlighted';
span.appendChild(highlighted);
after.parentNode.insertBefore(span, after);
}
}
}
});
.highlighted {
background: yellow
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<p id="sentence">a paragraph</p>
<p id="content">And this here is inside a paragraph , about paragliders. happy ending.</p>
更新的 fiddle 链接:
https://jsfiddle.net/2yw3s376/3/
处理<table>
的代码结构:
HTML:
<tr>
<td class="sentence">a paragraph</td>
<td class="content">And this here is inside a paragraph , about paragliders.happy ending.</td>
<tr>
二手 class
而不是 id
;因为我们不能在 DOM 中有重复的 id
JS代码:
$(document).ready(function() {
//loop through all sentence one by one
$(".sentence").each(function() {
var parentTR = $(this).closest("tr");
var wordText = $(this).text();
var rootNode = parentTR.find('.content')[0];
var rootText = $(rootNode).text();
highlightWord(rootText, wordText, rootNode);
})
function highlightWord(rootText, wordText, rootNode) {
textNodesUnder(rootNode).forEach(highlightWords);
function textNodesUnder(rootNode) {
var walk = document.createTreeWalker(rootNode, NodeFilter.SHOW_TEXT, null, false);
var text = [],
node;
while (node = walk.nextNode()) text.push(node);
return text;
}
function highlightWords(n) {
for (var i;
(i = n.nodeValue.indexOf(wordText, i)) > -1; n = after) {
var after = n.splitText(i + wordText.length);
var highlighted = n.splitText(i);
var span = document.createElement('span');
span.className = 'highlighted';
span.appendChild(highlighted);
after.parentNode.insertBefore(span, after);
}
}
}
});
关于javascript - 将html文本内容传入javascript函数,可高亮多句,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40414898/