使用javascript检测文本区域中的选定文本 [英] Detect selected text in a text area with javascript

问题描述

是否可以使用Javascript检测在文本区域中选择了哪些文本?我希望仅在用户选择了文本时显示它们

Is it possible to detect what text has been selected in a text area using Javascript? I'm looking to show the user controls only when they have selected text

推荐答案

我已经编写了一个跨浏览器功能，用于获取文本区域或文本输入中选择的文本，经过一番反复研究后，我认为我见过的最好的一个.我已经几次将其发布在Stack Overflow上.这是一个示例:是否存在是Internet Explorer批准的selectionStart和selectionEnd的替代品?

I've written a cross-browser function for getting the text selected in a textarea or text input and after some toing and froing the final version is I think the best one I've seen. I've posted it on Stack Overflow a few times before. Here's one example: Is there an Internet Explorer approved substitute for selectionStart and selectionEnd?

要检测用户何时在文本区域中进行选择，可以使用 select 事件:

To detect when the user makes a selection in a textarea, you can use the select event:

var textarea = document.getElementById("some_id");
textarea.onselect = function() {
    var selection = getInputSelection(textarea);
    var selectedText = textarea.value.slice(selection.start, selection.end);
    console.log("Selected text: " + selectedText);
};

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