正则 数字保留两位小数

^[0-9]+(.[0-9]{1,2})?$ 数字保留两位小数

 

const handleChange = val => {

let num = val.toString()

if (num.indexOf('.') === 0) {

num = `0${num}`

}

num = num.replace(/[^\d.]/g, '')

num = num.replace(/\.{2,}/g, '.')

num = num.replace('.', '$#$').replace(/\./g, '').replace('$#$', '.')

num = num.replace(/^(-)*(\d+)\.(\d\d).*$/, '$1$2.$3')

if (num.indexOf('.') < 0 && num !== '') {

num = parseFloat(num)

}

return num

}