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25 lines
886 B
25 lines
886 B
3 years ago
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/**
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* @description: 格式化数字
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* @param {Number} number 数字
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* @param {Number} places 在有小数时保留的小位数，默认0位
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* @param {String} thousand 用啥隔开：','
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* @param {String} decimal 表示小数点:'.'
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* @return {String}
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* @example formatNumber(12345) // 12,345
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*/
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export default function formatNumber(number = 0, places = 0, thousand = ',', decimal = '.') {
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number = +number || 0;
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const negative = number < 0 ? '-' : '';
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const i = parseInt(Math.abs(number)) + '';
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const j = i.length > 3 ? i.length % 3 : 0;
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const decimalIndex = ('' + number).lastIndexOf('.');
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return negative +
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(j ? i.substr(0, j) + thousand : '') +
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i.substr(j).replace(/(\d{3})(?=\d)/g, '$1' + thousand) +
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(
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places > 0 && decimalIndex > -1
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? decimal + ('' + number).substr(decimalIndex + 1, places).padEnd(places, '0')
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: ''
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);
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}
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