js函數(shù)自動執(zhí)行
<script?type="text/javascript">????
???var?aqiData?=?[????
???????["北京",?90],????
???????["上海",?50],????
???????["福州",?10],????
???????["廣州",?50],????
???????["成都",?90],????
???????["西安",?100]????
???];????
???(function?()?{????
???????/*????
????????在注釋下方編寫代碼????
????????遍歷讀取aqiData中各個(gè)城市的數(shù)據(jù)????
????????將空氣質(zhì)量指數(shù)大于60的城市顯示到aqi-list的列表中????
????????*/????
???????for(var?i=0;i<aqiData.length;i++){????
???????????????if(aqiData[i][1]>60){????
???????????????????var?liNode=document.createElement("li");????
???????????????????var?textNode=document.createTextNode(aqiData[i]);????
???????????????????liNode.appendChild(textNode);????
???????????????????document.getElementById("aqi-list").appendChild(liNode);????
???????????}????
???????}????
???})();????
</script>這個(gè)是不是閉包？函數(shù)可以自動執(zhí)行？
2017-03-23
這是立即執(zhí)行函數(shù)，你可以看看這個(gè)鏈接下的說明哈：http://www.jb51.net/article/50967.htm
2017-03-23
是閉包，函數(shù)外面加了個(gè)括號，()就會自動執(zhí)行。