layui table的数值保留两位小数

function fixed(str) {
	if (!str) str = '0.00';
	let ret = Math.round(parseFloat(str) * 100) / 100;
	let decimal = ret.toString().split('.');
	if (decimal.length === 1) {
		return ret.toString() + '.00'
	};
	if (decimal.length > 1) {
		if (decimal[1].length < 2) {
			return ret.toString() + '0'
		}
		return ret
	};
	return ret;
}
</script>

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