vue hello world项目
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 

83 lines
1.5 KiB

function klona(x) {
if (typeof x !== 'object') return x;
var k, tmp, str=Object.prototype.toString.call(x);
if (str === '[object Object]') {
if (x.constructor !== Object && typeof x.constructor === 'function') {
tmp = new x.constructor();
for (k in x) {
if (x.hasOwnProperty(k) && tmp[k] !== x[k]) {
tmp[k] = klona(x[k]);
}
}
} else {
tmp = {}; // null
for (k in x) {
if (k === '__proto__') {
Object.defineProperty(tmp, k, {
value: klona(x[k]),
configurable: true,
enumerable: true,
writable: true,
});
} else {
tmp[k] = klona(x[k]);
}
}
}
return tmp;
}
if (str === '[object Array]') {
k = x.length;
for (tmp=Array(k); k--;) {
tmp[k] = klona(x[k]);
}
return tmp;
}
if (str === '[object Set]') {
tmp = new Set;
x.forEach(function (val) {
tmp.add(klona(val));
});
return tmp;
}
if (str === '[object Map]') {
tmp = new Map;
x.forEach(function (val, key) {
tmp.set(klona(key), klona(val));
});
return tmp;
}
if (str === '[object Date]') {
return new Date(+x);
}
if (str === '[object RegExp]') {
tmp = new RegExp(x.source, x.flags);
tmp.lastIndex = x.lastIndex;
return tmp;
}
if (str === '[object DataView]') {
return new x.constructor( klona(x.buffer) );
}
if (str === '[object ArrayBuffer]') {
return x.slice(0);
}
// ArrayBuffer.isView(x)
// ~> `new` bcuz `Buffer.slice` => ref
if (str.slice(-6) === 'Array]') {
return new x.constructor(x);
}
return x;
}
exports.klona = klona;