ChildNode.after()

ChildNode.after() 方法会在其父节点的子节点列表中插入一些 Node 或 DOMString 对象。插入位置为该节点之后。DOMString 对象会被以 Text 的形式插入。

语法

[Throws, Unscopable]
void ChildNode.after((Node or DOMString)... nodes);

参数

nodes
一组准备插入的 Node 或 DOMString

错误

示例

插入元素

var parent = document.createElement("div");
var child = document.createElement("p");
parent.appendChild(child);
var span = document.createElement("span");

child.after(span);

console.log(parent.outerHTML);
// "<div><p></p><span></span></div>"

插入文本

var parent = document.createElement("div");
var child = document.createElement("p");
parent.appendChild(child);

child.after("Text");

console.log(parent.outerHTML);
// "<div><p></p>Text</div>"

同时插入元素和文本

var parent = document.createElement("div");
var child = document.createElement("p");
parent.appendChild(child);
var span = document.createElement("span");

child.after(span, "Text");

console.log(parent.outerHTML);
// "<div><p></p><span></span>Text</div>"

ChildNode.after() 会被 with 环境排除

after() 方法不在 with 环境的范围内,可以查看 Symbol.unscopables 来了解更多信息。

with(node) {
  after("foo");
}
// ReferenceError: after is not defined 

Polyfill

You can polyfill the after() method in Internet Explorer 9 and higher with the following code:

// from: https://github.com/jserz/js_piece/blob/master/DOM/ChildNode/after()/after().md
(function (arr) {
  arr.forEach(function (item) {
    if (item.hasOwnProperty('after')) {
      return;
    }
    Object.defineProperty(item, 'after', {
      configurable: true,
      enumerable: true,
      writable: true,
      value: function after() {
        var argArr = Array.prototype.slice.call(arguments),
          docFrag = document.createDocumentFragment();

        argArr.forEach(function (argItem) {
          var isNode = argItem instanceof Node;
          docFrag.appendChild(isNode ? argItem : document.createTextNode(String(argItem)));
        });

        this.parentNode.insertBefore(docFrag, this.nextSibling);
      }
    });
  });
})([Element.prototype, CharacterData.prototype, DocumentType.prototype]);

Another polyfill

// from: https://github.com/FabioVergani/js-Polyfill_Element.prototype.after/blob/master/after.js

(function(x){
 var o=x.prototype,p='after';
 if(!o[p]){
    o[p]=function(){
     var e, m=arguments, l=m.length, i=0, t=this, p=t.parentNode, n=Node, s=String, d=document;
     if(p!==null){
        while(i<l){
         e=m[i];
         if(e instanceof n){
            t=t.nextSibling;
            if(t!==null){
                p.insertBefore(e,t);
            }else{
                p.appendChild(e);
            };
         }else{
            p.appendChild(d.createTextNode(s(e)));
         };
         ++i;
        };
     };
    };
 };
})(Element);



/*
minified:

(function(x){
 var o=x.prototype;
 o.after||(o.after=function(){var e,m=arguments,l=m.length,i=0,t=this,p=t.parentNode,n=Node,s=String,d=document;if(p!==null){while(i<l){((e=m[i]) instanceof n)?(((t=t.nextSibling )!==null)?p.insertBefore(e,t):p.appendChild(e)):p.appendChild(d.createTextNode(s(e)));++i;}}});
}(Element));
*/

规范

Specification Status Comment
DOM
ChildNode.after()
Living Standard Initial definition.

浏览器兼容性

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相关链接