Question

有没有办法让div元素为空时有一个监听器？

 $('#myDiv').emptyEvent(function(){

)};

Answer 1

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：然而，如评论中所述，此类实施已被弃用。正如david所建议的另一种实现方式如下：

// 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);

Javascript'div empty'事件监听器

1 个答案: