shu-c-view/packages/cascader/mixins/util.js

rollup 打包vue@2.7组件库框架

const kebabCase = function(str) {
  const hyphenateRE = /([^-])([A-Z])/g;
  return str
    .replace(hyphenateRE, '$1-$2')
    .replace(hyphenateRE, '$1-$2')
    .toLowerCase();
};
function isObject(obj) {
  return Object.prototype.toString.call(obj) === '[object Object]';
}
const looseEqual = function(a, b) {
  const isObjectA = isObject(a);
  const isObjectB = isObject(b);
  if (isObjectA && isObjectB) {
    return JSON.stringify(a) === JSON.stringify(b);
  }
  if (!isObjectA && !isObjectB) {
    return String(a) === String(b);
  }
  return false;
};
const arrayEquals = function(arrayA, arrayB) {
  arrayA = arrayA || [];
  arrayB = arrayB || [];

  if (arrayA.length !== arrayB.length) {
    return false;
  }

  for (let i = 0; i < arrayA.length; i += 1) {
    if (!looseEqual(arrayA[i], arrayB[i])) {
      return false;
    }
  }

  return true;
};

const isEqual = function(value1, value2) {
  if (Array.isArray(value1) && Array.isArray(value2)) {
    return arrayEquals(value1, value2);
  }
  return looseEqual(value1, value2);
};

const isEmpty = function(val) {
  // null or undefined
  if (val === null) {
    return true;
  }

  if (typeof val === 'boolean') {
    return false;
  }

  if (typeof val === 'number') {
    return !val;
  }

  if (val instanceof Error) {
    return val.message === '';
  }

  switch (Object.prototype.toString.call(val)) {
    // String or Array
    case '[object String]':
    case '[object Array]':
      return !val.length;

    // Map or Set or File
    case '[object File]':
    case '[object Map]':
    case '[object Set]': {
      return !val.size;
    }
    // Plain Object
    case '[object Object]': {
      return !Object.keys(val).length;
    }
  }

  return false;
};
export { kebabCase, isEqual, isEmpty };