JavaScript removal node removalChild() usage introduction

removeChild(a) is used to delete existing elements in the document

Parameter a: The node to be moved out

The code copy is as follows:

<div id="guoDiv">

<span>1</span>

<span>2</span>

<span>3</span>

</div>

var oDiv = document.getElementById("guoDiv");

var firsChild = oDiv.firstElementChild ? oDiv.firstElementChild : oDiv.firstChild

var returnNode = oDiv.removeChild(firsChild); //Move out the first element and return the element removed

alert(returnNode.innerHTML); //1

var lastChild = oDiv.lastElementChild ? oDiv.lastElementChild : oDiv.lastChild;

returnNode = oDiv.removeChild(lastChild); //Move out the last element and return the removed element

alert(returnNode.innerHTML);//3