获取并设置内容可编辑div中的光标位置 [英] get and set cursor position in content editable div

问题描述

在内容可编辑的div中，我希望获取并设置光标位置，但不考虑子元素(例如 ， 等).

in a content editable div, i wish get and set cursor position but but without taking into account the child elements (, , etc for example).

为了得到，我找到了这个解决方案:

for get, i find this solution : Get a range's start and end offset's relative to its parent container

但是我不知道.

请你能帮我吗?

谢谢你

推荐答案

您可以使用 rangy 自己定义它，就像这样:

You can use rangy to define it yourself, just like this:

var selector = document.querySelector('[contenteditable]');

var setCaretIndex = function (index) {
    var charIndex = 0, stop = {};

    var traverseNodes = function (node) {
        if (node.nodeType === 3) {
            var nextCharIndex = charIndex + node.length;
            if (index >= charIndex && index <= nextCharIndex) {
                rangy.getSelection().collapse(node, index - charIndex);
                throw stop;
            }
            charIndex = nextCharIndex;
        }

        // Count an empty element as a single character. The list below may not be exhaustive.
        else if (node.nodeType === 1 && /^(input|br|img|col|area|link|meta|link|param|base)$/i.test(node.nodeName)) {
            charIndex += 1;
        } else {
            var child = node.firstChild;
            while (child) {
                traverseNodes(child);
                child = child.nextSibling;
            }
        }
    };

    try {
        traverseNodes(selector);
    } catch (ex) {
        if (ex !== stop) throw ex;
    }
};

要使用此功能，您需要先将编辑器聚焦:

To use this function, you need to focus the editor first:

selector.focus();

然后给出一个索引来设置光标位置:

Then giving an index to set cursor position:

setCaretIndex(3);

小提琴

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