本文實(shí)例為大家分享了js實(shí)現(xiàn)商品篩選功能的具體代碼，供大家參考，具體內(nèi)容如下
應(yīng)用場(chǎng)景：商品篩選
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<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Document</title> <style type="text/css"> * { margin: 0; padding: 0; list-style: none; text-decoration: none; } .choose { width: 500px; height: auto; margin: auto; } .choose nav { height: 50px; background-color: red; } .choose nav span { margin: 0 5px; } .choose .show { color: red; } .choose ul li { border: 1px solid black; } .choose ul li a { box-sizing: border-box; display: inline-block; width: 40px; border-left: 1px solid black; margin: 5px; padding-left: 5px; } </style></head><body> <div class="choose"> <nav></nav> <ul> <li> <strong>手機(jī):</strong> <a href="javascript:;">小米</a> <a href="javascript:;">華為</a> <a href="javascript:;">apple</a> <a href="javascript:;">OPPO</a> <a href="javascript:;">vivo</a> </li> <li> <strong>價(jià)格:</strong> <a href="javascript:;">3200</a> <a href="javascript:;">2600</a> <a href="javascript:;">899</a> <a href="javascript:;">2799</a> <a href="javascript:;">2299</a> </li> <li> <strong>屏幕:</strong> <a href="javascript:;">399</a> <a href="javascript:;">600</a> <a href="javascript:;">800</a> <a href="javascript:;">1200</a> </li> </ul> </div></body></html> |
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<script type="text/javascript"> var li = document.querySelectorAll('li'); var stack = []; //存放三個(gè)類別的option for (var i = 0; i < li.length; i++) { // 獲取每個(gè)li中的option進(jìn)行處理 var options = li[i].querySelectorAll("a"); for (var j = 0; j < options.length; j++) { // 當(dāng)選項(xiàng)被點(diǎn)擊時(shí)，傳入點(diǎn)擊的類別是第幾個(gè)li的 // options[j].onclick = Aclick.bind(options[j], [i]); //1. 將點(diǎn)擊事件分離出去 options[j].onclick = Bclick(i); //2. 將點(diǎn)擊事件分離出去 } }</script> |
當(dāng)寫(xiě)到這里的時(shí)候想要把這個(gè)事件函數(shù)分離出去，但是有參數(shù)。于是問(wèn)題出現(xiàn)
如何將一個(gè)帶參數(shù)的事件函數(shù)分離出去？？？
于是乎：就有了以下兩種方法
1、使用bind改變this指向后返回一個(gè)不執(zhí)行的函數(shù)
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function Aclick(index) {// 刪掉navvar choose = document.querySelector('.choose');var nav = document.querySelector(".choose nav"); choose.removeChild(nav); // 使用stack重新添加 stack[index] = this.innerHTML; var nav = document.createElement("nav"); for (k = 0; k < stack.length; k++) { if (stack[k] != "" && stack[k] != undefined) { //略過(guò)stack中的空項(xiàng)，重新向nav中添加span var span = document.createElement("span"); var a = document.createElement("a"); a.innerHTML = "X"; a.href = "javascript:void(0);"; span.innerHTML = stack[k]; a.onclick = function() { stack[index] = ""; nav.removeChild(this.parentNode); } span.appendChild(a); nav.appendChild(span); } } choose.insertBefore(nav, choose.children[0]);} |
2、在注冊(cè)函數(shù)外面套一層函數(shù)將注冊(cè)函數(shù)返回
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function Bclick(index) { return function() { // 刪掉nav var choose = document.querySelector('.choose'); var nav = document.querySelector(".choose nav"); choose.removeChild(nav); // 使用stack重新添加 stack[index] = this.innerHTML; var nav = document.createElement("nav"); for (k = 0; k < stack.length; k++) { if (stack[k] != "" && stack[k] != undefined) { //略過(guò)stack中的空項(xiàng)，重新向nav中添加span var span = document.createElement("span"); var a = document.createElement("a"); a.innerHTML = "X"; a.href = "javascript:void(0);"; span.innerHTML = stack[k]; a.onclick = function() { stack[index] = ""; nav.removeChild(this.parentNode); } span.appendChild(a); nav.appendChild(span); } } choose.insertBefore(nav, choose.children[0]); }} |
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
原文鏈接：https://blog.csdn.net/weixin_45773503/article/details/113444599
