ms、s、min、h单位换算代码可以再优化吗？

站长

2024年07月07日 08:48 · 阅读数 5

export const timeConvert = function (timeValue) {
  if (isNaN(timeValue)) {
    return '';
  }
  const baseUnitLabel = ['ms', 's', 'min', 'h'];
  const basicValue = [1,1000,1000*60,1000*60*60]
  const exp1 = Math.floor(timeValue / 1000);
  let exp2;
  if (exp1 < 1) {
    exp2 = 0
  } else if (exp1 < 60) {
    exp2 =  1
  } else if(exp1 < 60 * 60)  {
    exp2 = 2
  } else {
    exp2 = 3
  }
  let resValue = timeValue/basicValue[exp2]
  if (resValue.toString().length > resValue.toFixed(2).toString().length) {
    resValue = resValue.toFixed(2);
  }
  return `${resValue} ${baseUnitLabel[exp2]}`;
};

之后优化修改

export const timeConvert = function (timeValue) {
  if (isNaN(timeValue) || typeof timeValue != 'number') {
    return '';
  }
  const baseUnitLabel = ['ms', 's', 'min', 'h'];
  const baseUnitValue = [1,1000,1000*60,1000*60*60]
  const formatValue = Math.floor(timeValue / 1000);
  let resIndex;
  if (formatValue < 1) {
    resIndex = 0
  } else {
    const value = Math.floor(Math.log(formatValue) / Math.log(60)) + 1;
    resIndex = value > 3? 3: value
  }
  let resValue = timeValue / baseUnitValue[resIndex]
  if (resValue.toString().length > resValue.toFixed(2).length) {
    resValue = resValue.toFixed(2);
  }
  return `${resValue} ${baseUnitLabel[resIndex]}`;
};

1个回答

test

2024-07-07

export const timeConvert = function (timeValue) {
    if (!(typeof timeValue === "number" && timeValue >= 0)) {
        return "";
    }

    const baseUnitLabel = ["ms", "s", "min", "h"];
    const basicValue = [1, 1000, 1000 * 60, 1000 * 60 * 60];

    let index = Math.max(basicValue.findLastIndex(basic => timeValue > basic), 0)
    
    return `${Number((timeValue / basicValue[index]).toFixed(2))} ${baseUnitLabel[index]}`;
};

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