这是代码，包含所有“占位符”：( bottom: auto;)let h = window.innerHeight;var x = document.getElementsByTagName("BODY")[0];x.style = "height: " + h + "px;";window.addEventListener('resize', function(event){ x = document.getElementsByTagName("BODY")[0]; h = window.innerHeight; x.style = "height: " + h + "px;";});if(document.getElementById('main').offsetHeight > h) { document.getElementById('footer').style = "bottom: auto;";}* { margin: 0; padding: 0;}.Placeholder{ background-color: blue; height: 100px; width: 100%;}.MainContainer { width: 100%; padding: 0; margin: 0; background-color: green;}.MyFooter { position: absolute; bottom: 0px; width: 100%; background-color: red; padding: 0; margin: 0;}<body> <div class='Header'>Header</div> <div class="MainContainer" id="main"> <div class='Placeholder'></div> <div class='Placeholder'></div> <div class='Placeholder'></div> <div class='Placeholder'></div> <div class='Placeholder'></div> </div> <div class="MyFooter" id="footer"> This is my footer, it should always be at the bottom of the page. </div></body>
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冉冉说
TA贡献1877条经验 获得超1个赞
使用for 循环和模板文字动态插入 id
这是一个基本示例，它创建 10 个具有不同 id 的跨度
for(let i=1;i<=10;i++)
{
let div=document.createElement("div");
div.innerHTML=`<span id="span${i}">Hey this is Span ${i} </span>`;
document.body.append(div);
}
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