本文实例为大家分享了js实现商品筛选功能的具体代码,供大家参考,具体内容如下
应用场景:商品筛选
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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 >手机:</ strong > < a href = "javascript:;" >小米</ a > < a href = "javascript:;" >华为</ a > < a href = "javascript:;" >apple</ a > < a href = "javascript:;" >OPPO</ a > < a href = "javascript:;" >vivo</ a > </ li > < li > < strong >价格:</ 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 = []; //存放三个类别的option for ( var i = 0; i < li.length; i++) { // 获取每个li中的option进行处理 var options = li[i].querySelectorAll( "a" ); for ( var j = 0; j < options.length; j++) { // 当选项被点击时,传入点击的类别是第几个li的 // options[j].onclick = Aclick.bind(options[j], [i]); //1. 将点击事件分离出去 options[j].onclick = Bclick(i); //2. 将点击事件分离出去 } } </script> |
当写到这里的时候想要把这个事件函数分离出去,但是有参数。于是问题出现
如何将一个带参数的事件函数分离出去???
于是乎:就有了以下两种方法
1、使用bind改变this指向后返回一个不执行的函数
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function Aclick(index) { // 删掉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) { //略过stack中的空项,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、在注册函数外面套一层函数将注册函数返回
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function Bclick(index) { return function () { // 删掉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) { //略过stack中的空项,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内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/weixin_45773503/article/details/113444599