JavaScript-js tutorial

This article mainly introduces the JavaScript AOP programming and analyzes the implementation skills of javascript cross-section programming in the form of examples, which has some reference value, if you need it, refer to the example in this article to describe the AOP programming of JavaScript. Share it with you for your reference. The details are as follows:

/*// aop({options});// By: adamchow2326@yahoo.com.au// Version: 1.0// Simple aspect oriented programming module// support Aspect before, after and around// usage:    aop({      context: myObject,   // scope context of the target function.      target: "test",     // target function name      before: function() {  // before function will be run before the target function        console.log("aop before");      },      after: function() {   // after function will be run after the target function        console.log("aop after");      },      around: function() {  // around function will be run before and after the target function        console.log("aop around");      }    });*/var aop = (function() {  var options = {},    context = window,    oFn,    oFnArg,    targetFn,    targetFnSelector,    beforeFn,    afterFn,    aroundFn,    cloneFn = function(Fn) {      if (typeof Fn === "function") {        return eval('[' +Fn.toString()+ ']')[0];      }      return null;    },    checkContext = function() {      if (options.context) {        context = options.context;      }      if (typeof context[(options.target).name] === "function") {        targetFnSelector = (options.target).name;        targetFn = context[targetFnSelector];      }      else if (typeof context[options.target] === "function") {        targetFnSelector = options.target;        targetFn = context[targetFnSelector];      }      if (targetFn) {        oFn = cloneFn(targetFn);        oFnArg = new Array(targetFn.length);        return true;      }      else {        return false;      }    },    run = function() {      context[targetFnSelector] = function(oFnArg) {        if (aroundFn){          aroundFn.apply(this, arguments);        }        if (beforeFn){          beforeFn.apply(this, arguments); // 'this' is context        }        oFn.apply(this, arguments);        if (afterFn){          afterFn.apply(this, arguments); // 'this' is context        }        if (aroundFn){          aroundFn.apply(this, arguments);        }      };    };  return function(opt){    if (opt && typeof opt === "object" && !opt.length) {      options = opt;      if (options.target && checkContext()) {        if (options.before && typeof options.before === "function") {          beforeFn = options.before;        }        if (options.after && typeof options.after === "function") {          afterFn = options.after;        }        if (options.around && typeof options.after === "function") {          aroundFn = options.around;        }        run();      }    }  };})();// test examples// ----------------- aop modify global function ---------------//function test(name, age) {  console.log("test fn. name = " + name + " age: " + age);}aop({  target: "test",  before: function() {    console.log("aop before");  },  after: function() {    console.log("aop after");  },  around: function() {    console.log("aop around");  }});// runtest("adam", 6);// ----------------- aop test modify method in an object ---------------//var myobj = {  myName: "testName",  sayName: function() {    console.log(this.myName);  },  childObj: {    age: 6,    say: function() {      console.log(this.age);    }  }};aop({  context: myobj,  target: "sayName",  before: function() {    console.log("aop before say name = " + this.myName);  },  after: function() {    console.log("aop after say name = " + this.myName);  },  around: function() {    console.log("aop around say name = " + this.myName);  }});// runmyobj.sayName();aop({  context: myobj.childObj,  target: "say",  before: function() {    console.log("aop before say name = " + this.age);  },  after: function() {    console.log("aop after say name = " + this.age);  },  around: function() {    console.log("aop around say name = " + this.age);  }});myobj.childObj.say();

I hope this article will help you design javascript programs.