Vue中获取光标位置的方法.js</h1> <div data-v-88f98792="" class="flex items-center gap-2"> <button data-v-88f98792="" aria-disabled="false" type="button" class="el-button" style="font-size:.8rem;padding:.5rem;color:#333;background-color:#ecf5ff;border:0"><span class=""><ul data-v-88f98792="" class="flex float-left"><span data-v-88f98792="">None</span></ul></span> </button> <button data-v-88f98792="" aria-disabled="false" type="button" class="el-button" style="font-size:.8rem;padding:.5rem;color:#333;background-color:#ecf5ff;border:0"><span class=""><ul data-v-88f98792="" class="flex float-left"><span data-v-88f98792="">None</span></ul></span></button> </div> <div data-v-88f98792="" class="liststyle bg-white pb-2"></div> <ul data-v-88f98792="" class="space-x-3 text-sm text-gray-700 pt-1"> <li data-v-88f98792="" class="flex float-left items-center"><img data-v-88f98792="" class="size-3" 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listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="<span style=color: #f73131>Vue</span><span style=color: #f73131>中</span><span style=color: #f73131>获</span><span style=color: #f73131>取</span><<span style=color: #f73131>textarea</span>><span style=color: #f73131>光</span><span style=color: #f73131>标</span><span style=color: #f73131>位</span><span style=color: #f73131>置</span><span style=color: #f73131>的</span><span style=color: #f73131>方</span><span style=color: #f73131>法</span>.<span style=color: #f73131>js</span>" href="https://d.itadn.com/i0_79002234306/B/673953" target="_blank"><span style=color: #f73131>Vue</span><span style=color: #f73131>中</span><span style=color: #f73131>获</span><span style=color: #f73131>取</span><<span style=color: #f73131>textarea</span>><span style=color: #f73131>光</span><span style=color: #f73131>标</span><span style=color: #f73131>位</span><span style=color: #f73131>置</span><span style=color: #f73131>的</span><span style=color: #f73131>方</span><span style=color: #f73131>法</span>.<span style=color: #f73131>js</span></a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 本文章介绍了在使用Vue框架开发过程中如何获取<textarea>元素内的光标当前位置的具体方法和实现代码。 在使用Vue进行开发时，可以通过获取当前光标位置来实现插值操作。首先需要确定光标的所在位置，然后截取光标前后的字符串，并对新字符进行插入处理。这样可以确保新的内容准确地出现在指定的位置上。 </div><!---->   </div> </li> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="JavaScript <span style=color: #f73131>获</span><span style=color: #f73131>取</span>和设<span style=color: #f73131>置</span><span style=color: #f73131>光</span><span style=color: #f73131>标</span><span style=color: #f73131>位</span><span style=color: #f73131>置</span>（适用于 Input 和 <span style=color: #f73131>TextArea</span>）" href="https://d.itadn.com/i0_81853715910/B/737506" target="_blank">JavaScript <span style=color: #f73131>获</span><span style=color: #f73131>取</span>和设<span style=color: #f73131>置</span><span style=color: #f73131>光</span><span style=color: #f73131>标</span><span style=color: #f73131>位</span><span style=color: #f73131>置</span>（适用于 Input 和 <span style=color: #f73131>TextArea</span>）</a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 本篇文章讲解如何使用JavaScript获取和设置输入框（Input和Textarea）中的光标位置，并提供示例代码帮助开发者实现相关功能。 JavaScript可以用来获取和设置输入框（包括文本框和多行文本区域）中的光标位置。实现这一功能需要考虑不同浏览器之间的兼容性问题。通过编写相应的函数，可以在各种环境下准确地操作光标的当前位置。这种技术在开发复杂的表单交互应用时非常有用。 </div><!---->   </div> </li> <li data-v-abd0b829="" class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle" style="cursor: pointer;"> <div data-v-abd0b829="" class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize"> <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55" height="110"> <path data-v-abd0b829="" d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z" p-id="26447" fill="#707070"></path> <path data-v-abd0b829="" d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z" p-id="26448" fill="#707070"></path> </svg> </div> <div data-v-abd0b829="" class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden"> <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..." title="<span style=color: #f73131>JS</span><span style=color: #f73131>获</span><span style=color: #f73131>取</span>文本框<span style=color: #f73131>光</span><span style=color: #f73131>标</span><span style=color: #f73131>位</span><span style=color: #f73131>置</span>及选<span style=color: #f73131>中</span>文本范围" href="https://d.itadn.com/i0_26355037733/B/191120" target="_blank"><span style=color: #f73131>JS</span><span style=color: #f73131>获</span><span style=color: #f73131>取</span>文本框<span style=color: #f73131>光</span><span style=color: #f73131>标</span><span style=color: #f73131>位</span><span style=color: #f73131>置</span>及选<span style=color: #f73131>中</span>文本范围</a> </div> <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span data-v-abd0b829="" class="onestyle">优质</span></div> <div data-v-abd0b829="" class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white"> <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ..."> 本文介绍了如何使用JavaScript获取网页文本框中当前光标的位置以及被选中的文本长度和起始位置的方法。 在JavaScript编程中，文本框（TextBox）是网页交互的重要元素之一，用户可以在其中输入文本内容。开发者有时需要获取或操作文本框中的焦点光标位置、选中起始位置、终止位置以及选定的内容，这对于实现诸如高亮显示、文本编辑和格式化等功能至关重要。 本段落将深入探讨这些概念，并提供兼容IE8的解决方案： 1. **焦点光标位置**：当用户在文本框中输入时，插入点的位置即为焦点所在。这有助于开发者判断当前用户的输入位置并进行相应的处理。 2. **选中起始位置**：这是被选择的文本块开始处字符的位置。例如，在“Hello, World!”中选择了“World”，则其起始位置是6。 3. **终止位置**：与上述相反，这指的是所选内容结束时的字符位置。“World”在前述例子中的终止位置为11。 4. **选择内容**：这是由选定范围定义的具体文本。例如，“Hello, World!”中选择了“World”，则该段落即为选择的内容。 JavaScript提供了以下方法来获取和操作这些信息： - 获取焦点光标的位置： ```javascript function getCursorPos(input) { if (input.selectionStart) { //现代浏览器支持此属性 return input.selectionStart; } else if (document.selection) { //IE8及更早版本使用这种方式 input.focus(); var r = document.selection.createRange(); if (!r) return 0; var re = input.createTextRange(), rc = re.duplicate(); re.moveToBookmark(r.getBookmark()); rc.setEndPoint(EndToStart,re); return rc.text.length; } } ``` 此函数首先检查`selectionStart`属性，这是现代浏览器支持的API。对于IE8及更早版本，则利用了`document.selection`和`TextRange`对象来获取光标位置。 - 获取选中起始与终止的位置： ```javascript function getSelectionRange(input) { if (input.selectionStart !== undefined && input.selectionEnd !== undefined) { return { start: input.selectionStart, end: input.selectionEnd }; } else if (document.selection) { //IE8及更早版本使用这种方式 input.focus(); var range = document.selection.createRange(); return { start : 0 - range.duplicate().moveStart(character,-input.value.length), end : range.endOffset }; } } ``` 此函数返回一个对象，包含了选中内容的起始和终止位置。 - 获取选定文本： ```javascript function getSelectedText(input) { if (input.selectionStart !== undefined) { return input.value.slice(input.selectionStart, input.selectionEnd); } else if (document.selection) { return document.selection.createRange().text; } } ``` 此函数返回选中的文本字符串。 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