我在代码中使用拖放处理程序，并且确认共享的函数有一个 ext.Msg.Confirm，它驱动代码从“Ext/Classic/Src/Tree”触发 ViewDragZone。我们如何解决 extjs 代码触发的错误？非常感谢任何帮助
错误是从以下位置触发的：
afterRepair: function() {
var me = this,
view = me.view,
selectedRowCls = view.selectedItemCls,
records = me.dragData.records,
r,
rLen = records.length,
fly = Ext.fly,
item;
if (Ext.enableFx && me.repairHighlight) {
// Roll through all records and highlight all the ones we attempted to drag.
for (r = 0; r < rLen; r++) {
// anonymous fns below, don't hoist up unless below is wrapped in
// a self-executing function passing in item.
item = view.getNode(records[r]);
// We must remove the selected row class before animating, because
// the selected row class declares !important on its background-color.
fly(item.firstChild).highlight(me.repairHighlightColor, {
listeners: {
beforeanimate: function() {
if (view.isSelected(item)) {
fly(item).removeCls(selectedRowCls);
}
},
afteranimate: function() {
if (view.isSelected(item)) {
fly(item).addCls(selectedRowCls);
}
}
}
});
}
}
me.dragging = false;
}
});
错误如下：
Error while running task - TypeError: Cannot read properties of null (reading 'firstChild')
Caller: function() {
var me = this,
items = me.items.getRange(),
i = 0,
len = items.length,
anim;
//Ext.log(' executing anim runner task with ', len, ' items');
me.targetArr = {};
// Single timestamp for all animations this interval
me.timestamp = new Date();
// Loop to start any new animations first before looping to
// execute running animations (which will also include all animations
// started in this loop). This is a subtle difference from simply
// iterating in one loop and starting then running each animation,
// but separating the loops is necessary to ensure that all new animations
// actually kick off prior to existing ones regardless of array order.
// Otherwise in edge cases when there is excess latency in overall
// performance, allowing existing animations to run before new ones can
// lead to dropped frames and subtle race conditions when they are
// interdependent, which is often the case with certain Element fx.
for (; i < len; i++) {
anim = items[i];
if (anim.isReady()) {
//Ext.log(' starting anim ', anim.id, ', target: ', anim.target.id);
me.startAnim(anim);
}
}
for (i = 0; i < len; i++) {
anim = items[i];
if (anim.isRunning()) {
//Ext.log(' running anim ', anim.target.id);
me.runAnim(anim);
}
}
//else if (!me.useCSS3) {
// When using CSS3 transitions the animations get paused since they are not
// needed once the transition is handed over to the browser, so we can
// ignore this case. However if we are doing JS animations and something is
// paused here it's possibly unintentional.
//Ext.log(' (i) anim ', anim.id, ' is active but not running...');
//}
// Apply all the pending changes to their targets
me.applyPendingAttrs();
// Avoid retaining target references after we are finished with anims
me.targetArr = null;
}
log @ ext-all-rtl-debug.js?_dc=1705037511331:10025
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47646
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
onTick @ ext-all-rtl-debug.js?_dc=1705037511331:47710
elevate @ ext-all-rtl-debug.js?_dc=1705037511331:2552
timerFn @ ext-all-rtl-debug.js?_dc=1705037511331:7312
setTimeout (async)
defer @ ext-all-rtl-debug.js?_dc=1705037511331:7314
startTimer @ ext-all-rtl-debug.js?_dc=1705037511331:47737
start @ ext-all-rtl-debug.js?_dc=1705037511331:47532
addAnim @ ext-all-rtl-debug.js?_dc=1705037511331:48623
constructor @ ext-all-rtl-debug.js?_dc=1705037511331:50605
constructor @ ext-all-rtl-debug.js?_dc=1705037511331:13981
addAnimation @ ext-all-rtl-debug.js?_dc=1705037511331:52015
animate @ ext-all-rtl-debug.js?_dc=1705037511331:51971
repair @ ext-all-rtl-debug.js?_dc=1705037511331:168505
onInvalidDrop @ ext-all-rtl-debug.js?_dc=1705037511331:168809
onDragDrop @ ext-all-rtl-debug.js?_dc=1705037511331:168735
fireEvents @ ext-all-rtl-debug.js?_dc=1705037511331:163728
(anonymous) @ ext-all-rtl-debug.js?_dc=1705037511331:7399
handleMouseUp @ ext-all-rtl-debug.js?_dc=1705037511331:163448
fire @ ext-all-rtl-debug.js?_dc=1705037511331:21915
fire @ ext-all-rtl-debug.js?_dc=1705037511331:36732
publish @ ext-all-rtl-debug.js?_dc=1705037511331:36692
publishGestures @ ext-all-rtl-debug.js?_dc=1705037511331:37412
onTouchEnd @ ext-all-rtl-debug.js?_dc=1705037511331:37598
publishDelegatedDomEvent @ ext-all-rtl-debug.js?_dc=1705037511331:37497
doDelegatedEvent @ ext-all-rtl-debug.js?_dc=1705037511331:36758
onDelegatedEvent @ ext-all-rtl-debug.js?_dc=1705037511331:36745
ext-all-rtl-debug.js?_dc=1705037511331:10035 console.trace我们如何让第一个子元素具有元素或在事件触发之前检查其值。非常感谢您对这个问题的帮助/见解
此问题似乎已在 7.6 或 7.7 中得到解决，请尝试 7.7 版本，看看是否可以解决您的问题。从那里您可以快速检查是否覆盖旧版本。
或者如果您可以提供并解决问题，我可以提供帮助