js & float number bug

js & float number bug

前端最好不要处理任何的 float number 的计算/精确度转换的操作，不热很容易丢失精度，显示错误！

前端显示个 0.0 都很费劲，最好的方式就是数值型的数据后端全部给字符串

labelWeight = 0;
if(labelWeight === 0) {
    labelWeight = labelWeight + `.0`;
} else {
    if (!labelWeight) {
        labelWeight = "";
    }
}
"0.0"
labelWeight = null;
if(labelWeight === 0) {
    labelWeight = labelWeight + `.0`;
} else {
    if (!labelWeight) {
        labelWeight = "";
    }
}
""
labelWeight = "";
if(labelWeight === 0) {
    labelWeight = labelWeight + `.0`;
} else {
    if (!labelWeight) {
        labelWeight = "";
    }
}
""
labelWeight = "0.0";
if(labelWeight === 0) {
    labelWeight = labelWeight + `.0`;
} else {
    if (!labelWeight) {
        labelWeight = "";
    }
}
undefined
labelWeight = "0.999";
if(labelWeight === 0) {
    labelWeight = labelWeight + `.0`;
} else {
    if (!labelWeight) {
        labelWeight = "";
    }
}
undefined
labelWeight;
"0.999"

solution

后端返回处理后的 String 数据