如何在 keyup 上将 Id 属性分配给 contenteditable div 的所有子项?
How can I assign Id attribute to all the children of a contenteditable div on keyup?
我尝试了以下方法:
HTML:
<div contenteditable="true" id="editable"></div>
JS:
$('#editable').keyup(function() {
addID();
});
function addID()
{
$('#editable *').each(function() {
var t = GenerateID();
$(this).attr('id','id-' + t);
});
}
function GenerateID()
{
var str = 'abcdefghijklmnopqrstuvwxyz0123456789';
var alphabet = '',
genID = '';
while(genID.length < 5)
{
alphabet = str.charAt(Math.floor(Math.random() * str.length));
genID += alphabet;
}
return genID;
}
但在每次键入时它都会不断更改 ID。
如何在键入时为所有元素设置一次 id
,并在整个 div
期间保持其唯一性?
试试这个:
$('#editable').keyup(addID);
function addID() {
$('#editable *').each(function () {
var t = GenerateID();
var elem = $(this);
var attr = elem.attr('id');
if (!attr) {
elem.attr('id', 'id-' + t);
}
});
}
/**
* @return {string}
*/
function GenerateID() {
var str = 'abcdefghijklmnopqrstuvwxyz0123456789';
var alphabet = '',
genID = '';
while (genID.length < 5) {
alphabet = str.charAt(Math.floor(Math.random() * str.length));
genID += alphabet;
}
return genID;
}
Also consider that your random string generator may generate same string again.
最后更新:
现在我检查了您的 fiddle 中的代码,我确信它可以工作。检查唯一性可能会变成一个函数,但我会把它留给你:
$('#editable').on( 'keyup', addID );
var count = 0; // this will absolutely ensure that ID will be unique
function addID(){
var previousIDs = [];
$('#editable *').each(function() {
count++;
var thisID = $(this).attr( 'id' );
// let's check if we have duplicates:
var index = 0, len = previousIDs.length, isDuplicate = false;
for( index = 0; index < len; index++ ){
if ( thisID === previousIDs[index] ) {
isDuplicate = true;
break;
}
}
// now change the ID if needed:
if ( isDuplicate || ! thisID ){
var t = GenerateID();
var newID = 'id-' + t + '-' + count;
$(this).attr('id', newID);
previousIDs.push( newID );
}else{
previousIDs.push( thisID );
}
});
}
工作Fiddle
用以下代码替换您的代码:
$('#editable *').each(function() {
if(!$(this).hasClass("idgenerated")){
console.log( $(this).attr('id') );
var t = GenerateID();
$(this).attr('id','id-' + t);
$(this).addClass("idgenerated");
console.log($(this).prop("tagName") + ' = ' + t);
}
});
我尝试了以下方法:
HTML:
<div contenteditable="true" id="editable"></div>
JS:
$('#editable').keyup(function() {
addID();
});
function addID()
{
$('#editable *').each(function() {
var t = GenerateID();
$(this).attr('id','id-' + t);
});
}
function GenerateID()
{
var str = 'abcdefghijklmnopqrstuvwxyz0123456789';
var alphabet = '',
genID = '';
while(genID.length < 5)
{
alphabet = str.charAt(Math.floor(Math.random() * str.length));
genID += alphabet;
}
return genID;
}
但在每次键入时它都会不断更改 ID。
如何在键入时为所有元素设置一次 id
,并在整个 div
期间保持其唯一性?
试试这个:
$('#editable').keyup(addID);
function addID() {
$('#editable *').each(function () {
var t = GenerateID();
var elem = $(this);
var attr = elem.attr('id');
if (!attr) {
elem.attr('id', 'id-' + t);
}
});
}
/**
* @return {string}
*/
function GenerateID() {
var str = 'abcdefghijklmnopqrstuvwxyz0123456789';
var alphabet = '',
genID = '';
while (genID.length < 5) {
alphabet = str.charAt(Math.floor(Math.random() * str.length));
genID += alphabet;
}
return genID;
}
Also consider that your random string generator may generate same string again.
最后更新: 现在我检查了您的 fiddle 中的代码,我确信它可以工作。检查唯一性可能会变成一个函数,但我会把它留给你:
$('#editable').on( 'keyup', addID );
var count = 0; // this will absolutely ensure that ID will be unique
function addID(){
var previousIDs = [];
$('#editable *').each(function() {
count++;
var thisID = $(this).attr( 'id' );
// let's check if we have duplicates:
var index = 0, len = previousIDs.length, isDuplicate = false;
for( index = 0; index < len; index++ ){
if ( thisID === previousIDs[index] ) {
isDuplicate = true;
break;
}
}
// now change the ID if needed:
if ( isDuplicate || ! thisID ){
var t = GenerateID();
var newID = 'id-' + t + '-' + count;
$(this).attr('id', newID);
previousIDs.push( newID );
}else{
previousIDs.push( thisID );
}
});
}
工作Fiddle
用以下代码替换您的代码:
$('#editable *').each(function() {
if(!$(this).hasClass("idgenerated")){
console.log( $(this).attr('id') );
var t = GenerateID();
$(this).attr('id','id-' + t);
$(this).addClass("idgenerated");
console.log($(this).prop("tagName") + ' = ' + t);
}
});