沙箱小案例
substr截取, 從指定的欄位開始截取
(function () { var str="小白喜歡小黑"; str=str.substr(2); console.log(str); }());
substr截取, 從指定的欄位開始截取
//沙箱 (function () { var str="小明喜歡小紅"; str=str.substr(2); console.log(str); }());
沙箱的案例，操作頁面元素
<div>這是div</div>
<div>這是div</div>
<div>這是div</div>
<p>這是p</p>
<p>這是p</p>
<p>這是p</p>
<script>
var getTag = 10;
var dvObjs = 20;
var pObjs = 30;
(function () {
//根據標簽名字獲取元素
function getTag(tagName) {
return document.getElementsByTagName(tagName);
}
//獲取所有div
var dvObjs = getTag("div");
for (var i = 0; i < dvObjs.length; i++) {
dvObjs[i].style.border = "2px solid pink";
}
//獲取所有p
var pObjs = getTag("p");
for (var i = 0; i < pObjs.length; i++) {
pObjs[i].style.border = "2px solid pink";
}
}());
console.log(getTag);
console.log(dvObjs);
console.log(pObjs);
</script>
轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/156861.html
標籤：JavaScript