vue.js 中写的真不错，收藏了

/** * Check if two values are loosely equal - that is, * if they are plain objects, do they have the same shape? */ function looseEqual (a, b) { if (a === b) { return true } var isObjectA = isObject(a); var isObjectB = isObject(b); if (isObjectA && isObjectB) { try { var isArrayA = Array.isArray(a); var isArrayB = Array.isArray(b); if (isArrayA && isArrayB) { return a.length === b.length && a.every(function (e, i) { return looseEqual(e, b[i]) }) } else if (a instanceof Date && b instanceof Date) { return a.getTime() === b.getTime() } else if (!isArrayA && !isArrayB) { var keysA = Object.keys(a); var keysB = Object.keys(b); return keysA.length === keysB.length && keysA.every(function (key) { return looseEqual(a[key], b[key]) }) } else { /* istanbul ignore next */ return false } } catch (e) { /* istanbul ignore next */ return false } } else if (!isObjectA && !isObjectB) { return String(a) === String(b) } else { return false } }

/** * Check if two values are loosely equal - that is, * if they are plain objects, do they have the same shape? */ function looseEqual (a, b) { if (a === b) { return true } var isObjectA = isObject(a); var isObjectB = isObject(b); if (isObjectA && isObjectB) { try { var isArrayA = Array.isArray(a); var isArrayB = Array.isArray(b); if (isArrayA && isArrayB) { return a.length === b.length && a.every(function (e, i) { return looseEqual(e, b[i]) }) } else if (a instanceof Date && b instanceof Date) { return a.getTime() === b.getTime() } else if (!isArrayA && !isArrayB) { var keysA = Object.keys(a); var keysB = Object.keys(b); return keysA.length === keysB.length && keysA.every(function (key) { return looseEqual(a[key], b[key]) }) } else { /* istanbul ignore next */ return false } } catch (e) { /* istanbul ignore next */ return false } } else if (!isObjectA && !isObjectB) { return String(a) === String(b) } else { return false } }