千分位分隔符
123456789101112131415161718192021222324252627282930313233343536373839
/**
* 利用正则转换数值或数值字符串为千位符格式
* decimalNeedComma 小数是否转为千位符格式
* //131452256235131452256235.12312312 超出精度的数 不适用
* eg:
* console.log(addThousandSeparator(-131452256235.12312312))
* console.log(addThousandSeparator(31452256235.12312312,true))
*/
let addThousandSeparator=(num,decimalNeedComma=false)=>{
return (num||0).toString().split(".").reduce((ret,v,i,arr)=>{
return (i?ret+".":"")+
(
i?
(decimalNeedComma?v.replace(/(\d{3})(?=\d+)/g,'$1,'):v)
:
v.replace(/[+-]?(\d)(?=(?:\d{3})+(\.\d+)?$)/g, '$1,'));
},'')
}
console.log(addThousandSeparator(13452256235.12312312))
console.log(addThousandSeparator(-3452256235.12312312,true))
console.log(addThousandSeparator(131452256235131452256235.12312312,true))//不适用
let num = -345225324234324234223426235.1232314;
console.log(`
addThousandSeparator
========================================
我是风骚的分隔线
========================================
toLocaleString
`);
//toLocaleString
console.log((13421543453).toLocaleString());
console.log((-234223426235.1232314).toLocaleString());
console.log((45225324234324234223426235).toLocaleString());
JavaScript
INFO