我是开发新手，对于一些学习实践我正在做这个可以打印到DOM Dice Roller的香草JS。
主要思想是让用户输入边数和骰子数，按下掷骰子并获取所有骰子结果和DOM上的总和。
它正在运作，但我无法弄清楚为什么我需要点击两次才能发生此事件，请提供任何提示？
http://codepen.io/rufi_rufino/pen/MKdrbj
//Variables
var form = document.getElementById('mytest');
var sideField = document.getElementById('sides');
var numberField = document.getElementById('numbofdices');
var numberOfSides = 0;
var numberOfDice = 0;
var arrayOfResults = [];
var resultOfSum = 0;
//to get dice data (sides and # of dices) form html forms - Using .preventdefault() to stop from sending form and staying with result;
form.addEventListener('submit', function(e) {
//to get the value of the number of sides the dice has:
numberOfSides = (sideField.value);
//to get the value of the number of dices in the game:
numberOfDice = (numberField.value);
e.preventDefault();
});
//Basic Functions
//function to calculate a result and create the array of all results
function createArrayOfDice () {
for (i = 1 ; i <= numberOfDice ; i++) {
var result = 0;
result = Math.floor((Math.random() * numberOfSides) + 1);
arrayOfResults.push(result);
}
}
// function to sum the results of all dice
function sumOfAllDices() {
// the line below "resets" the output if user clicks more than once
document.getElementById("results").innerHTML = " ";
for (i = 0 ; i < arrayOfResults.length ; i++) {
resultOfSum = resultOfSum + arrayOfResults[i];
document.getElementById("results").innerHTML = document.getElementById("results").innerHTML + "<div class='diceroll'>" + arrayOfResults[i] + "</div>";
}
console.log(resultOfSum);
document.getElementById("sum").innerHTML = "<div class='dicesum'>" + resultOfSum + "</div>";
resultOfSum = 0;
}
//function that works when user clicks the 'Roll' submit button on html
function myClick () {
createArrayOfDice();
// for console purpose(see if it is wokring)
console.log(arrayOfResults);
sumOfAllDices();
// for console study only
console.log ("The input number for how many sides the dice has is:" + numberOfSides);
console.log ("The input number for the number of dices is:" + numberOfDice);
arrayOfResults = [];
};
如果有人可以提供帮助，我感激不尽。这也是我的第一个问题，如果我犯了任何错误，我很乐意将其考虑在内。