突出显示textarea内的文字，如Facebook [英] Highlight text inside textarea like Facebook does

问题描述

当您输入@< NAME_OF_A_FRIEND>时，我会尝试达到Facebook的效果。在回复。选择朋友后，该朋友的名称以蓝色背景突出显示，因此您知道它是该文本中的单独实体。

I try to achieve something like the Facebook does when you type @<NAME_OF_A_FRIEND> in a reply. After you choose a friend, the name of that friend is highlighted with a blueish background, so you know it's a separate entity in that text.

我有inspect元素

I've "inspect element"-ed that textarea and there is no div placed on top of the textarea.

任何人都可以给我一个关于如何做的线索？

Can anyone give me a clue about how that is done ?

>

推荐答案

请参见此示例。我只使用CSS和HTML ... JS现在是非常复杂的。我不知道您的期望。

See this example here. I used only CSS and HTML... The JS is very more complex for now. I don't know exactly what you expect.

HTML：

<div id="textback">
    <div id="backmodel"></div>
</div>
<textarea id="textarea">Hey Nicolae, it is just a test!</textarea>

CSS：

#textarea {
    background: transparent;
    border: 1px #ddd solid;
    position: absolute;
    top: 5px;
    left: 5px;
    width: 400px;
    height: 120px;
    font: 9pt Consolas;
}

#backmodel {
    position: absolute;
    top: 7px;
    left: 32px;
    background-color: #D8DFEA;
    width: 53px;
    height: 9pt;
}

这篇关于突出显示textarea内的文字，如Facebook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！