function filterObject(obj) {
    for (var propName in obj) {
        if (!(obj[propName] || obj[propName] === false)) {
            delete obj[propName];
        }
    }

    return obj;
}

这个函数也从对象中删除NaN值，很容易理解

函数式和不可变的方法，不需要.filter，也不需要创建超出需要的对象

Object.keys(obj).reduce((acc, key) => (obj[key] === undefined ? acc : {...acc, [key]: obj[key]}), {})

如果有人需要欧文(和埃里克)答案的递归版本，这里是:

/**
 * Delete all null (or undefined) properties from an object.
 * Set 'recurse' to true if you also want to delete properties in nested objects.
 */
function delete_null_properties(test, recurse) {
    for (var i in test) {
        if (test[i] === null) {
            delete test[i];
        } else if (recurse && typeof test[i] === 'object') {
            delete_null_properties(test[i], recurse);
        }
    }
}

您可以使用JSON的组合。stringify，它的替换参数，以及JSON。解析将其转换回对象。使用此方法还意味着替换嵌套对象中的所有嵌套键。

实例对象

var exampleObject = {
  string: 'value',
  emptyString: '',
  integer: 0,
  nullValue: null,
  array: [1, 2, 3],
  object: {
    string: 'value',
    emptyString: '',
    integer: 0,
    nullValue: null,
    array: [1, 2, 3]
  },
  arrayOfObjects: [
    {
      string: 'value',
      emptyString: '',
      integer: 0,
      nullValue: null,
      array: [1, 2, 3]
    },
    {
      string: 'value',
      emptyString: '',
      integer: 0,
      nullValue: null,
      array: [1, 2, 3]
    }
  ]
};

替代者函数

function replaceUndefinedOrNull(key, value) {
  if (value === null || value === undefined) {
    return undefined;
  }

  return value;
}

清洁物体

exampleObject = JSON.stringify(exampleObject, replaceUndefinedOrNull);
exampleObject = JSON.parse(exampleObject);

CodePen例子

function filterObject(obj) {
    for (var propName in obj) {
        if (!(obj[propName] || obj[propName] === false)) {
            delete obj[propName];
        }
    }

    return obj;
}

这个函数也从对象中删除NaN值，很容易理解

清除空数组、空对象、空字符串、未定义、NaN和空值。

function objCleanUp(obj:any) {
  for (var attrKey in obj) {
    var attrValue = obj[attrKey];
    if (attrValue === null || attrValue === undefined || attrValue === "" || attrValue !== attrValue) {
      delete obj[attrKey];
    } else if (Object.prototype.toString.call(attrValue) === "[object Object]") {
      objCleanUp(attrValue);
      if(Object.keys(attrValue).length===0)delete obj[attrKey];
    } else if (Array.isArray(attrValue)) {
      attrValue.forEach(function (v,index) {
        objCleanUp(v);
        if(Object.keys(v).length===0)attrValue.splice(index,1);
      });
      if(attrValue.length===0)delete obj[attrKey];
    }
  }
}

objCleanUp(myObject)

(attrValue !== attrValue)检查NaN。在这里学的