Javascript 如何用索引替换div中的字符串
有没有办法替换Javascript 如何用索引替换div中的字符串,javascript,jquery,Javascript,Jquery,有没有办法替换contenteditable属性设置为true的div中的字符串? 例如: <div id="editableDiv" contenteditable="true"> the quick brown fox jumps over a lazy dog. </div> 下面是我用来获取角色位置的函数: function getCaretCharOffset() { var element = document.getElementById(
contenteditable
属性设置为true
的div中的字符串?例如:
<div id="editableDiv" contenteditable="true">
the quick brown fox jumps over a lazy dog.
</div>
下面是我用来获取角色位置的函数:
function getCaretCharOffset() {
var element = document.getElementById("editableDiv");
var caretOffset = 0;
if (typeof window.getSelection != "undefined") {
var range = window.getSelection().getRangeAt(0);
var preCaretRange = range.cloneRange();
preCaretRange.selectNodeContents(element);
preCaretRange.setEnd(range.endContainer, range.endOffset);
caretOffset = preCaretRange.toString().length;
}
else if (typeof document.selection != "undefined" && document.selection.type != "Control")
{
var textRange = document.selection.createRange();
var preCaretTextRange = document.body.createTextRange();
preCaretTextRange.moveToElementText(element);
preCaretTextRange.setEndPoint("EndToEnd", textRange);
caretOffset = preCaretTextRange.text.length;
}
console.log(caretOffset);
return caretOffset;
}
这是工作程序
“你好,我是文本”
$('one span')。文本('Hi I am replace');
单击按钮从字符串中提取字符
试试看
函数myFunction()
{
var str=“你好,世界!”;
var-res=str.substring(1,4);
document.getElementById(“demo”).innerHTML=res;
}
您可以使用substring()
方法获取搜索字符串,并使用replace()
方法替换它
<div id="sam" contenteditable="true">the quick brown fox jumps over a lazy dog
</div>
<button id="click">Click Me</button>
document.getElementById("click").addEventListener("click",function()
{
var startIndex = 0;
var endIndex = 2;
var str = "why";
var divStr = document.getElementById("sam").innerHTML;
var searchStr = divStr.substring(startIndex,endIndex+1);
document.getElementById("sam").innerHTML = divStr.replace(searchStr,str);
},false);
敏捷的棕色狐狸跳过一只懒狗
点击我
document.getElementById(“单击”).addEventListener(“单击”,函数)()
{
var startIndex=0;
var-endIndex=2;
var str=“为什么”;
var divStr=document.getElementById(“sam”).innerHTML;
var searchStr=divStr.substring(startIndex,endIndex+1);
document.getElementById(“sam”).innerHTML=divStr.replace(searchStr,str);
},假);
直播我看不出这与这个问题有什么关系
<div id="one">
<div class="first"></div>
<span>"Hi I am text"</span>
<div class="second"></div>
<div class="third"></div>
</div>
$('#one span').text('Hi I am replace');
<p id="demo">Click the button to extract characters from the string.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction()
{
var str = "Hello world!";
var res = str.substring(1,4);
document.getElementById("demo").innerHTML=res;
}
</script>
<div id="sam" contenteditable="true">the quick brown fox jumps over a lazy dog
</div>
<button id="click">Click Me</button>
document.getElementById("click").addEventListener("click",function()
{
var startIndex = 0;
var endIndex = 2;
var str = "why";
var divStr = document.getElementById("sam").innerHTML;
var searchStr = divStr.substring(startIndex,endIndex+1);
document.getElementById("sam").innerHTML = divStr.replace(searchStr,str);
},false);