1.声明函数属性及其方法
function arithmetic(numArr) { this.numArr = numArr; } arithmetic.prototype.summation = function(numArr) { var sum = 0; if(typeof(numArr) != undefined) { for(var i = 0; i < numArr.length; i++) { sum += numArr[i]; } } return sum; } arithmetic.prototype.showSum = function(numArr) { return this.summation(numArr); }
2.实例化函数并调用
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <script type="text/javascript" src="js/jquery-3.1.1.min.js" ></script> <script type="text/javascript" src="js/arithmetic.js" ></script> <script type="text/javascript"> var arithmetic; var numArr; $(document).ready(function(){ numArr=[2,5,3,10,20]; arithmetic=new arithmetic(numArr); }) function summate(){ var sum1=arithmetic.summation(arithmetic.numArr); var sum2=arithmetic.showSum(arithmetic.numArr); alert(sum1); alert(sum2); } </script> </head> <body> <button onclick="summate();">点击</button> </body> </html>