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                ### sessionStorage和localStorage * sessionStorage ~~~ <script type="text/javascript"> sessionStorage.setItem("key", "value"); var value = sessionStorage.getItem("key"); console.log(value); </script> ~~~ > [3分鐘學會sessionStorage用法](https://blog.csdn.net/oaa608868/article/details/53539954) #### Base64函數 * 加密btoa * 解密atob ~~~ var text = "wangerxiao"; console.log(window.btoa(text));//d2FuZ2VyeGlhbw== console.log(window.atob(window.btoa(text)));//wangerxiao ~~~ ### 各大函數 * 回調函數 ~~~ <script type="text/javascript"> function return_data(data1,data2,fun){ var all = data1+data2; fun(all); } return_data(300,800,function(res){ console.log("這是一個回調函數"+res); }); </script> ~~~ * 匿名函數:JS匿名函數理解 匿名函數的基本形式為(function(){...})(); 前面的括號包含函數體,后面的括號就是給匿名函數傳遞參數并立即執行之 匿名函數的作用是避免全局變量的污染以及函數名的沖突 ~~~ // 匿名函數 var name = "test-name"; var res = (function(num){ if(name){ console.log("獲取到值:"+name); } return num+5; }(45)); console.log("匿名函數的返回值:"+res); ~~~
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