if.IsInteger（）在if else语句中不起作用

Question

 function bereken() { input1 = document.getElementById('input1').value; input2 = document.getElementById('input2').value; input1Valid = Number.isInteger(document.getElementById('input1')); input2Valid = Number.isInteger(document.getElementById('input2')); if (Number.isInteger(input1) && Number.isInteger(input2)) { alert('De getallen zijn allebei hele getallen') } }

 <!DOCTYPE html> <html> <head> <script src='code.js'></script> </head> <body> <center> <h1>GGD calculator</h1> <p>Reken de Grote Gemene Deler uit van <input type='number' id='input1'> en <input type='number' id='input2'>.</p> <br> <input type='button' value='Bereken!' onClick='bereken()'> </center> </body> </html>

I was practising JavaScript and I came across this issue, can anybody help me? 我正在练习JavaScript，我遇到了这个问题，任何人都可以帮助我吗？

I want it to alert my message when both numbers entered are integers, why is this not working? 当输入的两个数字都是整数时，我希望它提醒我的信息，为什么这不起作用？

Answer 1

The value of the #num element is returned as a string as you can see in the console. 正如您在控制台中看到的那样，＃num元素的值将作为字符串返回。 Just revert it to a number using + sign. 只需使用+号将其还原为数字即可。

 function bereken() { input1 = document.getElementById('input1').value; input2 = document.getElementById('input2').value; if (Number.isInteger(+input1) && Number.isInteger(+input2)) { alert('De getallen zijn allebei hele getallen') } }

 <!DOCTYPE html> <html> <head> <script src='code.js'></script> </head> <body> <center> <h1>GGD calculator</h1> <p>Reken de Grote Gemene Deler uit van <input type='number' id='input1'> en <input type='number' id='input2'>.</p> <br> <input type='button' value='Bereken!' onClick='bereken()'> </center> </body> </html>

if.IsInteger（）在if else语句中不起作用

问题描述

1 个解决方案

解决方案1
11 已采纳 2017-11-09 20:52:51

if.IsInteger（）在if else语句中不起作用

问题描述

1 个解决方案

解决方案1 11 已采纳 2017-11-09 20:52:51

解决方案1
11 已采纳 2017-11-09 20:52:51