一、代码示例

function fu(s) {str = '';ste = '';console.log(s);let Things = s;for (let i = 0; i < Things.length; i++) {if (Things[i].pid == kk) {console.log(Things[i].pid);ste += `<div class="commodity_nei"><div class="zxc_pic"><div class="wan"><img src="https://wwz.jingyi.icu/${Things[i].img}" alt=""></div><div class="bao"><div class="fenn"><p>${Things[i].nickname}</p></div><div class="fen"><p>${Things[i].create_time}</p></div></div></div></div>`} else {str = `<div class="null">暂无数据</div>`}}$('.null').html(str)$('.commodity_nei').html(ste)}

二、效果图

三、解决方式

在循环里添加一个状态去解决此类问题

代码

function fu(s) {str = '';ste = '';let nums = 0;console.log(s);let Things = s;for (let i = 0; i < Things.length; i++) {if (Things[i].pid == kk) {console.log(Things[i].pid);nums++ste += `<div class="commodity_nei"><div class="zxc_pic"><div class="wan"><img src="https://wwz.jingyi.icu/${Things[i].img}" alt=""></div><div class="bao"><div class="fenn"><p>${Things[i].nickname}</p></div><div class="fen"><p>${Things[i].create_time}</p></div></div></div></div>`} else {str = `<div class="null">暂无数据</div>`}}console.log(nums);if(nums>0){$('.commodity_nei').html(ste)}else{$('.null').html(str)}
}

四、效果图

总结在循环里写判断当条件满足时都会执行，我们需要在循环进行判断输出；

希望可以帮助大家解决问题