有没有办法让 div 元素为空时监听?
$('#myDiv').emptyEvent(function(){
)};
您应该在事件处理程序中运行 David 的代码,例如DOMNodeInserted
、DOMCharacterDataModified
或DOMSubtreeModified
。后者是最推荐的。例如:
$('#myDiv').bind("DOMSubtreeModified", function(){
if ( $('#myDiv').html() == "" ) {
}
)};
编辑:但是,如评论中所述,不推荐使用此类实现。正如 david 所建议的,另一种实现如下:
// select the target node
var target = $("#myDiv")[0];
// create an observer instance
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(mutation) {
if($("#myDiv").html() == ""){
// Do something.
}
});
});
// configuration of the observer:
var config = { attributes: true, childList: true, characterData: true };
// pass in the target node, as well as the observer options
observer.observe(target, config);