我们网站在选中某个单词标记高亮后,在最后保存页面,所有和这个一样的单词都会被自动标记高亮,我们只需要之前这一个单词高亮标记,有没有可以解决的,高价求
14条回答 默认 最新
- eq0284 2022-07-28 14:28关注
<html> <head> <script type="text/javascript"> function saveHighlight() { let sel = window.getSelection(); let range = sel.getRangeAt(0); console.log(range) let startNode = range.startContainer; let endNode = range.endContainer; if (startNode.nodeType == 3) { var startIsText = true; var startFlag = startNode.parentNode; startNode = startNode.nodeValue; } else { var startIsText = false; var startFlag = startNode; } if (endNode.nodeType == 3) { var endIsText = true; var endFlag = endNode.parentNode; endNode = endNode.nodeValue; } else { var endIsText = false; var endFlag = endNode; } let startOffset = range.startOffset; let endOffset = range.endOffset; let startTagName = startFlag.nodeName; let startHTML = startFlag.innerHTML; let endTagName = endFlag.nodeName; let endHTML = endFlag.innerHTML; let rInfo = { startNode: startNode, startOffset: startOffset, startIsText: startIsText, startTagName: startTagName, startHTML: startHTML, endNode: endNode, endOffset: endOffset, endIsText: endIsText, endTagName: endTagName, endHTML: endHTML }; let highlight_position_list = JSON.parse(window.localStorage.getItem("highlight_position_list") || '[]') highlight_position_list.push(rInfo) window.localStorage.setItem("highlight_position_list", JSON.stringify(highlight_position_list)); highlight(sel); } function getHighlight() { let highlight_position_list = JSON.parse(window.localStorage.getItem("highlight_position_list") || '[]') // use(highlight_position_list[0]); for (let position of highlight_position_list) { use(position); } window.localStorage.removeItem("highlight_position_list"); } function findEle(tagName, innerHTML) { let list = document.getElementsByTagName(tagName); for (let i = 0; i < list.length; i++) { if (list[i].innerHTML == innerHTML) { return list[i]; } } } function show(startNode, startIsText, startOffset, endNode, endIsText, endOffset, sP, eP) { var s, e; if (startIsText) { let childs = sP.childNodes; for (let i = 0; i < childs.length; i++) { if (childs[i].nodeType == 3 && childs[i].nodeValue == startNode) s = childs[i]; } } else { s = startNode; } if (endIsText) { let childs = eP.childNodes; for (let i = 0; i < childs.length; i++) { if (childs[i].nodeType == 3 && childs[i].nodeValue == endNode) e = childs[i]; } } else { e = startNode; } // 开始高亮 let range = document.createRange(); range.setStart(s, startOffset); range.setEnd(e, endOffset); let sel = window.getSelection(); sel.removeAllRanges(); sel.addRange(range); // 开启文档编辑 document.designMode = 'on' document.execCommand('BackColor', false, "yellow") document.designMode = 'off' // 去掉默认选中的蓝色 window.getSelection().empty() } function use(obj) { let sP = findEle(obj.startTagName, obj.startHTML); let eP = findEle(obj.endTagName, obj.endHTML); show( obj.startNode, obj.startIsText, obj.startOffset, obj.endNode, obj.endIsText, obj.endOffset, sP, eP ); } function highlight(sel) { // 开启文档编辑 document.designMode = 'on' range = sel.getRangeAt(0) if (range) { sel.removeAllRanges() sel.addRange(range) } document.execCommand('BackColor', false, "yellow") document.designMode = 'off' // 去掉默认选中的蓝色 window.getSelection().empty() } </script> </head> <body id="content"> 我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本我是高亮文本 <button onclick="saveHighlight()">高亮</button> <button onclick="getHighlight()">加载上一次高亮结果</button> </body> </html>
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