js & float number bug

JS浮点数精度陷阱

最新推荐文章于 2023-08-09 21:39:49 发布

weixin_30548917

最新推荐文章于 2023-08-09 21:39:49 发布

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CC 4.0 BY-SA版权

文章标签：前端后端 ViewUI

原文链接：http://www.cnblogs.com/xgqfrms/p/10510489.html

本文探讨了JavaScript中处理浮点数的精度问题，强调前端应避免直接进行浮点数运算，以防精度丢失。建议后端处理数值型数据并以字符串形式返回，以确保前端显示的准确性。

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"