JavaScript AOP使用
2305 ワード
:https://www.cnblogs.com/zengyuanjun/p/7429968.html
/**
* @desc aop
* @param {Function} originFunc -
* @param {Function} before -
* @param {Function} after -
*/
function constructor(originFunc, before, after) {
return function() {
before.apply(this, arguments);
originFunc.apply(this, arguments);
after.apply(this, arguments);
}
}
function calcAdd(a, b) {
console.log(a+b);
return a + b;
}
// AOP
calcAdd = constructor(calcAdd, function() {
console.log('add before');
}, function() {
console.log('add after');
});
// add before 5 add after
calcAdd(2, 3);
// AOP
var aopFactory = function(before, after) {
// ,
function constructor(originFun){
function _class(){
proxy.before.apply(this, arguments);
originFun.apply(this, arguments);
proxy.after.apply(this, arguments);
}
return _class;
}
// ,a ,b
var proxy = {
add: function(a, b) {
var fnName = '';
if (typeof a === 'function') {
fnName = a.name;
} else if (typeof a === 'string') {
fnName = a;
} else {
return;
}
// window
b = b || window;
if (typeof b === 'object' && b[fnName]) {
b[fnName] = constructor(b[fnName]);
}
},
before: function() {
},
after: function() {
}
};
if (typeof before === 'function') {
proxy['before'] = before;
}
if (typeof after === 'function') {
proxy['after'] = after;
}
return proxy;
}
var printProxy, checkProxy;
//
function printArguments(){
for(var i = 0; i < arguments.length; i++){
console.info("param" + (i + 1) + " = " + arguments[i]);
}
}
//
function printSum() {
var sum = 0;
for(var i = 0; i < arguments.length; i++){
sum += arguments[i];
}
console.log(' ', sum);
}
// AOP
printProxy = aopFactory(printArguments, printSum);
function calcAdd(a, b) {
return a + b;
}
//
printProxy.add(calcAdd);
calcAdd(1, 2);