如何在 HTML 中的 conteneditable table 中设置字符串的最大长度？
How do I set a max length of a string in a conteneditable table in HTML?
我最近一直在做一个词搜索器，但是我遇到了一个问题。问题是我将 table 与 contenteditable 一起使用，但如何设置最大字符串长度。我已经试过了
maxlength="1"
谁能帮忙！
#editor {
background-color: turquoise;
}
<table border="1" id="editor" width="500px" height="500px">
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
</table>
当运行代码片段时，请全屏。
拜托，如果有什么办法，请尽量避免jquery！
您可以将它们更改为输入，或使用以下 JavaScript
var pre = onload, doc, T, oneCharOnly; // change pre to another var if using technique on different page
onload = function(){
if(pre)pre();
doc = document;
T = function(n, e){
var w = e || doc;
return w.getElementsByTagName(n);
}
oneCharOnly = function(){
var tds = T('td');
for(var i=0,l=tds.length; i<l; i++){
tds[i].onkeyup = function(){
if(!this.innerHTML.match(/^.$/)){
this.contentEditable = false;
}
}
}
}
oneCharOnly(); // okay to use on other pages due to scope
}
#editor {
background-color: turquoise;
}
<table border="1" id="editor" width="500px" height="500px">
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
</table>
您可以使用 javascript:
示例：
const table = document.querySelector('table');
const validateMaxLength = (event) => {
const textLength = event.target.textContent.length;
if ( textLength > 5) {
event.preventDefault();
}
}
table.addEventListener('keydown', validateMaxLength);
#editor {
background-color: turquoise;
}
<table border="1" id="editor" width="500px" height="500px">
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
</table>
我最近一直在做一个词搜索器，但是我遇到了一个问题。问题是我将 table 与 contenteditable 一起使用，但如何设置最大字符串长度。我已经试过了
maxlength="1"
谁能帮忙！
#editor {
background-color: turquoise;
}
<table border="1" id="editor" width="500px" height="500px">
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
</table>
当运行代码片段时，请全屏。
拜托，如果有什么办法，请尽量避免jquery！
您可以将它们更改为输入，或使用以下 JavaScript
var pre = onload, doc, T, oneCharOnly; // change pre to another var if using technique on different page
onload = function(){
if(pre)pre();
doc = document;
T = function(n, e){
var w = e || doc;
return w.getElementsByTagName(n);
}
oneCharOnly = function(){
var tds = T('td');
for(var i=0,l=tds.length; i<l; i++){
tds[i].onkeyup = function(){
if(!this.innerHTML.match(/^.$/)){
this.contentEditable = false;
}
}
}
}
oneCharOnly(); // okay to use on other pages due to scope
}
#editor {
background-color: turquoise;
}
<table border="1" id="editor" width="500px" height="500px">
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
</table>
您可以使用 javascript:
示例：
const table = document.querySelector('table');
const validateMaxLength = (event) => {
const textLength = event.target.textContent.length;
if ( textLength > 5) {
event.preventDefault();
}
}
table.addEventListener('keydown', validateMaxLength);
#editor {
background-color: turquoise;
}
<table border="1" id="editor" width="500px" height="500px">
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
<tr>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
<td contenteditable="true"> </td>
</tr>
</table>