将元素追加为元素之后的兄弟元素？

Question

如何使用纯Javascript在HTML元素后添加文本？有appendChild但是这会在元素中添加它.我宁愿把它添加为像这样的元素之后的兄弟:

<img id="myimg" src="..." />

<script>
  var myimg = document.getElementById('myimg');
  myimg.appendAFTER('This is my caption.'); //pseudo-code and doesn't really work
</script>

我想最终得到这个:

<img id="myimg" src="..." />
This is my caption.

什么是after()jQuery 的Javascript等价物？

Answer 1

退房和(小提琴):Node.insertBefore()Node.nextSibling

var myimg = document.getElementById('myimg');
var text = document.createTextNode("This is my caption.");
myimg.parentNode.insertBefore(text, myimg.nextSibling)

或(小提琴):Element.insertAdjacentHtml()

var myimg = document.getElementById('myimg');
myimg.insertAdjacentHTML("afterend", "This is my caption.");

Answer 2

请使用以下代码：

<img id="myimg" src="..." />

<script>
  var myimg = document.getElementById('myimg');
  var txt=document.createElement("span");
  txt.innerHTML="Whatever text you want to write . . .";
  if(myimg.nextSibling){
    myimg.parentNode.insertBefore(txt,myimg.nextSibling);
  }else{
    myimg.parentNode.appendChild(txt);
  }
</script>