Append should be a method in jq. Why can I achieve the same effect as appendChild when I use js without introducing jq?
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>IFE JavaScript Task 01</title>
</head>
<body>
<h3>污染城市列表</h3>
<ul id="aqi-list">
<!--
<li>第一名：福州（样例），10</li>
<li>第二名：福州（样例），10</li> -->
</ul>
<script type="text/javascript">
var aqiData = [
["北京", 90],
["上海", 50],
["福州", 10],
["广州", 50],
["成都", 90],
["西安", 100]
];
(function() {
/*
在注释下方编写代码
遍历读取aqiData中各个城市的数据
将空气质量指数大于60的城市显示到aqi-list的列表中
*/
var aqiList = document.getElementById("aqi-list");
var aqiArray = [];
var cnArray = ["一", "二", "三", "四", "五", "六"];
//大于60的放进数组并排序
for(var i = 0; i < aqiData.length; i++) {
if(aqiData[i][1] >= 60) {
aqiArray.push(aqiData[i]);
aqiArray.sort(function(a,b){
return b[1]-a[1];
});
};
};
//循环数组，创建节点
for(var i = 0; i < aqiArray.length; i++) {
var newLi = document.createElement("li");
newLi.innerHTML = "第" + cnArray[i] + "名：" + aqiArray[i];
aqiList.append(newLi);
};
})();
</script>
</body>
</html>
曾经蜡笔没有小新2017-05-19 10:18:34
This is a method on the node node, but there are browser compatibility issues, so try not to use it
MDN has documentation
https://developer.mozilla.org...
ParentNode.append method inserts a set of Node objects or DOMString objects after the last child node of ParentNode.
The inserted DOMString object is equivalent to a Text node.
phpcn_u15822017-05-19 10:18:34
parentNode.append() is still in the trial period and has compatibility issues. It is to insert a new Node or DOMString (string, after insertion, it will be a Text node) after the last child node in the parendNode node.
is replaced with parentNode.appendChild()的区别在于：parentNode.append()可以同时传入多个节点或字符串，没有返回值；
而parentNode.appendChild()只能传一个节点，且不直接支持传字符串(需要parentNode.appendChild(document.createTextElement('字符串'))), returning the appended Node node
After typing and submitting, I found the correct answer above haha
某草草2017-05-19 10:18:34
append and appendChild have the same function, but one is written in jq, and the other is written in js native way
曾经蜡笔没有小新2017-05-19 10:18:34
aqiList is an array, and append is one of the array methods of native js.