48 lines
1.4 KiB
JavaScript
48 lines
1.4 KiB
JavaScript
function $(className) {
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var newClassName = className.split(" ");
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if (newClassName.length > 1) {
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var father = newClassName[newClassName.length - 2];
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var childrenList = document.querySelector(father).children;
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var arr = Array.from(childrenList).filter(function (el){
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if (
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el.className.indexOf( (newClassName[newClassName.length-1]).replace(".", "") ) > -1
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||
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el.tagName.toLowerCase() == newClassName[newClassName.length-1]
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) {
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return el;
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}
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});
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if (arr.length > 1) {
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return document.querySelectorAll(className)
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} else if (arr.length == 1){
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return document.querySelector(className)
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} else {
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throw new Error(`${className} 不存在，请检查`)
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}
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} else {
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return document.querySelector(newClassName);
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}
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}
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function scroll(callback) {
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$("body").onscroll = () => {
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let scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
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let clientHeight = document.documentElement.clientHeight || document.body.clientHeight;
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let scrollHeight = document.documentElement.scrollHeight || document.body.scrollHeight;
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if(scrollHeight > clientHeight && scrollTop + clientHeight === scrollHeight) {
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callback()
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}
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}
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}
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function query(name) {
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var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
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var r = window.location.search.substr(1).match(reg);
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if(r!=null)return unescape(r[2]); return null;
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} |