javascript删除div onclick

Question

with pure javascript, I need to remove a li on click the span .

• By clicking remove I want to remove its div.

 Object.prototype.remove = function(){ this.parentNode.removeChild(this); }; var lis = document.querySelectorAll('li'); var button = document.querySelectorAll('span'); for (var i = 0, len = lis.length; i < len; i++) { button[i].addEventListener('click', remove, false); } 

 <ul> <li>List item one<span> remove</span></li> <li>List item two<span> remove</span></li> <li>List item three<span> remove</span></li> <li>List item four<span> remove</span></li> <li>List item five<span> remove</span></li> <li>List item six<span> remove</span></li> </ul> 

Answer 1

Don't pollute Object . You don't need this function in every object. Create an separate function and use remove() , not removeChild() .

The ChildNode.remove() method removes the object from the tree it belongs to.

But remove doesn't work in every browser. It is a new function. So I suggest you two solutions.

With remove()

 var remove = function(){ this.parentNode.remove(); }; var lis = document.querySelectorAll('li'); var button = document.querySelectorAll('span'); for (var i = 0, len = lis.length; i < len; i++) { button[i].addEventListener('click', remove, false); } 

 <ul> <li>List item one<span> remove</span></li> <li>List item two<span> remove</span></li> <li>List item three<span> remove</span></li> <li>List item four<span> remove</span></li> <li>List item five<span> remove</span></li> <li>List item six<span> remove</span></li> </ul> 

With removeChild() .

Why 2 parentNodes?

Because the first is the <span> , but you need li

 function remove() { this.parentNode.parentNode.removeChild(this.parentNode); } var lis = document.querySelectorAll('li'); var button = document.querySelectorAll('span'); for (var i = 0, len = lis.length; i < len; i++) { button[i].addEventListener('click', remove, false); } 

 <ul> <li>List item one<span> remove</span></li> <li>List item two<span> remove</span></li> <li>List item three<span> remove</span></li> <li>List item four<span> remove</span></li> <li>List item five<span> remove</span></li> <li>List item six<span> remove</span></li> </ul> 

Answer 2

Try following solution.

 Object.prototype.remove = function(){ this.parentNode.parentNode.removeChild(this.parentNode); }; var lis = document.querySelectorAll('li'); var button = document.querySelectorAll('span'); for (var i = 0, len = lis.length; i < len; i++) { button[i].addEventListener('click', remove, false); } 

 <ul> <li>List item one<span> remove</span></li> <li>List item two<span> remove</span></li> <li>List item three<span> remove</span></li> <li>List item four<span> remove</span></li> <li>List item five<span> remove</span></li> <li>List item six<span> remove</span></li> </ul> 

It would be better to just define a simple function instead of changing the object prototype, as @Satpal suggested.

 function remove() { this.parentNode.parentNode.removeChild(this.parentNode); } var lis = document.querySelectorAll('li'); var button = document.querySelectorAll('span'); for (var i = 0, len = lis.length; i < len; i++) { button[i].addEventListener('click', remove, false); } 

 <ul> <li>List item one<span> remove</span></li> <li>List item two<span> remove</span></li> <li>List item three<span> remove</span></li> <li>List item four<span> remove</span></li> <li>List item five<span> remove</span></li> <li>List item six<span> remove</span></li> </ul> 

Answer 3

You want to remove the < li > element that contains the "remove" option? If so, that's how to do it.

 Object.prototype.remove = function(){ this.parentNode.parentNode.removeChild(this.parentNode); }; var lis = document.querySelectorAll('li'); var button = document.querySelectorAll('span'); for (var i = 0, len = lis.length; i < len; i++) { button[i].addEventListener('click', remove, false); } 

 <ul> <li>List item one<span> remove</span></li> <li>List item two<span> remove</span></li> <li>List item three<span> remove</span></li> <li>List item four<span> remove</span></li> <li>List item five<span> remove</span></li> <li>List item six<span> remove</span></li> </ul>