function numFloat(num){
num = num.toFixed(2);
num = num.substr(0,num.length-1);
var lastStr = num.charAt(num.length-1);
if(lastStr%2 == 0){
return num;
} else {
return(num-0.1).toFixed(1);
}}
JS保留一位小数(不四舍五入),向下取偶数
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转载自blog.csdn.net/weixin_42398560/article/details/81515137
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