node.js中格式化数字增加千位符的几种方法

replace(/(\d{3})/g,"$1,").split("").reverse().join("");

"115000000".split("").reverse().join("").replace(/(\d{3})(?=[^$])/g,").split("").reverse().join("");

var str = '123123211312.333123'.replace(/(?=(?!^)(?:\d{3})+(?:\.|$))(\d{3}(\.\d+$)?)/g,',$1'); console.log(str)

'1500000000000'.replace(/\B(?=(\d{3})+$)/g,')

number(value) { value = value.toString(); if (value.length <= 3) { return value; } else { return formatnumber(value.substr(0,value.length - 3)) + ',' + value.substr(value.length - 3); } }

String();