30 lines
880 B
TypeScript
30 lines
880 B
TypeScript
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/**
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* 截取指定长度的数值
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* @param value 待截取的数值
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* @param len 截取的长度
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* @param prefixZero 如果只有一位是否添加0
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* @returns 截取后的数值字符串
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*/
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export const formatNumber = (
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value: string | number,
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len = 2,
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prefixZero = true
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): string => {
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let number: number | string = 0
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// 判断传入的值是什么类型
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if (typeof value === 'string') {
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// 如果为空字符串直接返回
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if (value === '') return value
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number = Number(value)
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} else if (typeof value === 'number') {
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number = value
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}
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if (Number.isNaN(number) || number === 0) return prefixZero ? '00' : '0'
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const maxNumber = Math.pow(10, len) - 1
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if (number > maxNumber) return `${maxNumber}+`
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number = String(number)
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return prefixZero
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? `00${number}`.slice(Math.max(0, number.length > 2 ? 2 : number.length))
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: number
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}
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