contenteditable,在文本的末尾设置插入符号(跨浏览器) [英] contenteditable, set caret at the end of the text (cross-browser)

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本文介绍了contenteditable,在文本的末尾设置插入符号(跨浏览器)的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

Chrome 中输出

 < div id =contentcontenteditable =true style =border:1px solid#000; width:500px; height:40px;> 
hey
< div>有什么?< / div>
< div>
< button id =insert_caret>< / button>



我相信 FF 会是这样:

  hey 
< br />
是什么?

IE

  hey 
< p>有什么?< / p&

不幸的是,没有什么好的方法让每个浏览器插入< br /> 而不是div或p标签,或者至少我在网上找不到任何东西。






任何时候,我现在想做的是,当我点击按钮时,我想要在文本结尾处设置插入符号,因此它应该看起来像这样:

  hey 
怎么了?

以任何方式执行此操作,所以它可以在所有浏览器 p>

例如:

  $(document).ready b $ b {
$('#insert_caret')。click(function()
{
var ele = $('#content');
var length = ele。 html()。length;

ele.focus();

//设置caret - > end pos
}
}


解决方案

以下函数将在所有主流浏览器中执行:

  function placeCaretAtEnd(el){
el.focus();
if(typeof window.getSelection!= undefined
&&typeof document.createRange!=undefined){
var range = document.createRange();
range.selectNodeContents(el);
range .collapse(false);
var sel = window.getSelection();
sel.removeAllRanges();
sel.addRange(range);
} else if .body.createTextRange!=undefined){
var textRange = document.body.createTextRange();
textRange.moveToElementText(el);
textRange.collapse(false);
textRange.select();
}
}

placeCaretAtEnd(document.getElementById(content));

在开头放置插入符号几乎是相同的:它只是需要更改传递到调用的布尔值 collapse()。下面是一个创建用于在开头和结尾放置插入符的函数的示例:

  function createCaretPlacer(atStart){
return function(el){
el.focus();
if(typeof window.getSelection!=undefined
&&&typeof document.createRange!=undefined){
var range = document.createRange();
range.selectNodeContents(el);
range.collapse(atStart);
var sel = window.getSelection();
sel.removeAllRanges();
sel.addRange(range);
} else if(typeof document.body.createTextRange!=undefined){
var textRange = document.body.createTextRange();
textRange.moveToElementText(el);
textRange.collapse(atStart);
textRange.select();
}
};
}

var placeCaretAtStart = createCaretPlacer(true);
var placeCaretAtEnd = createCaretPlacer(false);


output in Chrome:

<div id="content" contenteditable="true" style="border:1px solid #000;width:500px;height:40px;">
    hey
    <div>what's up?</div>
<div>
<button id="insert_caret"></button>

I believe in FF it would look something like this:

hey
<br />
what's up?

and in IE:

hey
<p>what's up?</p>

unfortunately, there is no nice way of making it so that every browser inserts a <br /> instead of a div- or p-tag, or at least I couldn't find anything online.


ANYWAY, what I am trying to do now is, when I hit the button, I want the caret to be set at the end of the text, so it should look something like this:

hey
what's up?|

any way to do this so it works in all browser?

example:

$(document).ready(function()
{
    $('#insert_caret').click(function()
    {
        var ele = $('#content');
        var length = ele.html().length;

        ele.focus();

        //set caret -> end pos
     }
 }

解决方案

The following function will do it in all major browsers:

function placeCaretAtEnd(el) {
    el.focus();
    if (typeof window.getSelection != "undefined"
            && typeof document.createRange != "undefined") {
        var range = document.createRange();
        range.selectNodeContents(el);
        range.collapse(false);
        var sel = window.getSelection();
        sel.removeAllRanges();
        sel.addRange(range);
    } else if (typeof document.body.createTextRange != "undefined") {
        var textRange = document.body.createTextRange();
        textRange.moveToElementText(el);
        textRange.collapse(false);
        textRange.select();
    }
}

placeCaretAtEnd( document.getElementById("content") );

Placing the caret at the start is almost identical: it just requires changing the Boolean passed into the calls to collapse(). Here's an example that creates functions for placing the caret at the start and at the end:

function createCaretPlacer(atStart) {
    return function(el) {
        el.focus();
        if (typeof window.getSelection != "undefined"
                && typeof document.createRange != "undefined") {
            var range = document.createRange();
            range.selectNodeContents(el);
            range.collapse(atStart);
            var sel = window.getSelection();
            sel.removeAllRanges();
            sel.addRange(range);
        } else if (typeof document.body.createTextRange != "undefined") {
            var textRange = document.body.createTextRange();
            textRange.moveToElementText(el);
            textRange.collapse(atStart);
            textRange.select();
        }
    };
}

var placeCaretAtStart = createCaretPlacer(true);
var placeCaretAtEnd = createCaretPlacer(false);

这篇关于contenteditable,在文本的末尾设置插入符号(跨浏览器)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!

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