前端开发之便利店收银系统代码

 
 

 4.5
 

 15
 

 5
 

 
 
 
 

addClick = (price) => {  
 let result = $('#t').val(); //从表单里面获取value值
 if (result == "") {  //如果为空
 $('#t').val(price); //把值输入到#t（显示框）
 } else {
 $('#t').val(result + "+" + price); //不为空就在value后面加一个+链接price
 }
 }
 sub = () => {
 let result = $('#t').val();
 // let a = [];
 let sum = 0;
 if (result != "") {
 var count = result.split('+'); //count是以一个以+号切割的数组对象
 for (let i = 0; i < count.length; i++) {
  sum += parseFloat(count[i]); //取出来，取值
 }
 $('#t').val("总金额：" + sum);
 disableBtn();
 transparency();
 }
 }
 
 disableBtn = () => {
 $('#JZ').attr('disabled', 'disabled');
 }
 
 transparency = () => {
 $("#main").css("transition","all 1s");
 $("#main").css("opacity","0.3");
 }
 
 reload=()=>{
 location.reload();
 }