After following, you can keep track of his dynamic information in a timely manner
Courses in the relevant section：Overview of operators in JavaScript
运算符 ++：累加+1 &&与、||或、!()非
2022-09-130个赞
Courses in the relevant section：JavaScript array type (Array)
创建数组的方法： var a = new Array(length) var a = Array("a", "b") var a = []
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Courses in the relevant section：String manipulation methods in JavaScript
字符串替换：a.replace(/before/, "after") 字符串截取：a.substr(start, length) 或者a.substring(start, stop)
2022-09-130个赞
