let p = new Proxy(target, handler);
var obj = new Proxy({}, {
get: function (target, key, receiver) {
console.log(`proxy get ${key}`)
return Reflect.get(target, key, receiver)
},
set: function (target, key, value, receiver) {
console.log(`proxy set ${key}`)
return Reflect.set(target, key, value, receiver)
}
})
var docCookies = window.localStorage;
/*
var docCookies = ... get the "docCookies" object here:
https://developer.mozilla.org/zh-CN/docs/DOM/document.cookie#A_little_framework.3A_a_complete_cookies_reader.2Fwriter_with_full_unicode_support
*/
var docCookies = new Proxy(docCookies, {
"get": function (oTarget, sKey) {
return oTarget[sKey] || oTarget.getItem(sKey) || undefined;
},
"set": function (oTarget, sKey, vValue) {
if (sKey in oTarget) { return false; }
return oTarget.setItem(sKey, vValue);
},
"deleteProperty": function (oTarget, sKey) {
if (sKey in oTarget) { return false; }
return oTarget.removeItem(sKey);
},
"enumerate": function (oTarget, sKey) {
return oTarget.keys();
},
"ownKeys": function (oTarget, sKey) {
return oTarget.keys();
},
"has": function (oTarget, sKey) {
return sKey in oTarget || oTarget.hasItem(sKey);
},
"defineProperty": function (oTarget, sKey, oDesc) {
if (oDesc && "value" in oDesc) { oTarget.setItem(sKey, oDesc.value); }
return oTarget;
},
"getOwnPropertyDescriptor": function (oTarget, sKey) {
var vValue = oTarget.getItem(sKey);
return vValue ? {
"value": vValue,
"writable": true,
"enumerable": true,
"configurable": false
} : undefined;
},
});
/* Cookies 测试 */
alert(docCookies.my_cookie1 = "First value");
alert(docCookies.getItem("my_cookie1"));
docCookies.setItem("my_cookie1", "Changed value");
alert(docCookies.my_cookie1);