突出显示用户在 Javascript 中对文本所做的编辑
我正在尝试在页面中创建一个可编辑的文本字段，该字段突出显示用户在编辑文本时对文本所做的编辑。例如，用户插入或更改的文本应该出现在彩色背景下，删除应该通过向相邻字符添加彩色背景（或者可能是某种符号？）来指示......这似乎比我难得多我想在 Javascript 中做到这一点，令我惊讶的是我找不到任何已经实现这样的文本字段的代码。
你知道有什么可以实现我正在寻找的东西吗？
谢谢！
I'm trying to create an editable text field in a page which highlights the edits made by the user to the text as it is being edited. For instance, text inserted or changed by the user should appear against a colored background, deletions should be indicated by adding a colored background to the neighboring characters (or maybe some kind of symbol?)... It seems to be much harder than I thought to do this in Javascript, and I am surprised that I couldn't find any code already implementing such a text field.
Do you know of anything which implements what I'm looking for?
Thanks!
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您应该查看 Google 的纯文本差异、匹配和补丁库 它们是开源的，并且可以使用 JavaScript 和其他语言。
差异演示。
You should have a look at Google's Diff, Match and Patch libraries for Plain Text which are open source and available in JavaScript among other languages.
Diff demo.
第1步->将原始值存储在变量 V1
Step2->将修改后的值存储在变量 V2
Step3->对于 V2 中的每个单词 [单词至少被一个空格分隔] 对照 V1 检查它，如果不一样，用 HTML 标签突出显示它！
Step1->Store the original value in a variable V1
Step2->Store the modified value in a variable V2
Step3->For each word in V2 [word are divided by at least a single space] check it against the V1, if it's not same HIGHLIGHT it with HTML tag !