Common methods for Global, Math, and date objects in JavaScript

The common methods of global, Math, and date types in JavaScript are as follows:

1 /*2 The global object in JS is a nonexistent object, and the method inside it can call3 Common methods:4 1 encodeURI Convert the URI byte, do not change the special symbol, not commonly used5 2 encodeURIComponent Convert byte code to URI, convert all symbols commonly used6 3 decodeURI decoding7 4 decodeuricomponent decoding8 5 eval Pass in a string as a JS script to execute9 6 parseint Strings converted to integersTen 7 parsefloat string converted to decimal One 8 IsNaN Not number type returns True A 9 Escape to string transcoding with Chinese - Unesacape string decoding with Chinese characters - */ the //1 encodeURI Convert the URI byte, do not change the special symbol, not commonly used - //2 encodeURIComponent Convert byte code to URI, convert all symbols commonly used - //3 decodeURI decoding - //4 decodeuricomponent decoding + varURI = "Http://www.baidu.com cn"; - varUri1 =encodeURI (URI); + varUri2 =encodeURIComponent (URI); A alert (URI1); at alert (URI2); - alert (decodeURI (URI1)); - alert (decodeURIComponent (URI2)); -  -  - //5 eval Pass in a string as a JS script to execute in varstr = "var a = 10;"; - eval (str); to alert (a); + varstr1 = "{name: ' Z3 ', age:18}"; - varobj = eval ("(" +str1+ ")");//enclosed in parentheses represents an immediate execution of a code block, and the execution result is assigned to obj as an object. the alert (obj.name); *  $ Panax Notoginseng  //6 parseint -  //7 parsefloat theAlert (parseint ("10")); +Alert (parsefloat ("10.1")); A  the  + //9 Escape with Chinese transcoding - //Ten Unesacape with Chinese decoding $ varstr = Escape ("haha"); $ alert (str); - Alert (unescape (str)); -  the  - Wuyi  the  -  Wu //Math.random () generates a [0,1] random number - //Math.ceil (num) rounding up About //Math.floor (num) rounding down $ //math.round (num) rounding -  -  -  A varDate =NewDate (); + //alert (date); the //Date datetime = new Date () - //method to get the current time $ varYear =date.getfullyear (); the //alert (year); the varmonth = Date.getmonth () +1 ; the //alert (month); the varTdate = Date.getdate ();//Date - //alert (tdate); in varHours = Date.gethours ();//Get Hours the //alert (hours); the varmin = Date.getminutes ();//minutes About //alert (min); the varSEC = Date.getseconds ();//seconds the //alert (sec); the varDay = Date.getday ();//Day of the week + //alert (day); -  the //alert ("Today is" +year+ "year" +month+ "month" +day+ "Day, Week" +day + "," + hours+ "point" +min+ "sub" +sec+ "Seconds");Bayidocument.write ("Today is" +year+ "year" +month+ "month" +day+ "Day, Week" +day + "," + hours+ "point" +min+ "minute" +sec+ "seconds" ); the             

Common methods for Global, Math, and date objects in JavaScript