javascript - 在“点击”时将数字添加到数组中

问题描述

所以我正在制作一个计算器而不是实际的按钮，我将它们放在 div 中，所以它就是这样。

我正在尝试这样做只是香草javascript，并且我正在尝试向“按钮”添加一个事件侦听器，单击时将div放入数组中。我认为无论如何我都走在正确的道路上，而且我'确定我将不得不在实际开始计算之前解析数组或 div。

检查下面的JS：

'use strict';

const input = document.querySelector('#input'), // input/output button
  numbers = document.querySelectorAll('.numbers div'), // number buttons
  operators = document.querySelectorAll('.operators div'), // operator buttons
  result = document.querySelector('#result'), // equal button
  clear = document.querySelector('#clear'); // clear button


let numberInput = []

document.getElementsByClassName('.numbers div')
  .addEventListener('click', function(event){
    numberInput.push(event);
  });
console.log(numberInput)

let resultDisplayed = false; // flag to keep an eye on what output is displayed

body {
    font-size: 16px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

p {
    display: block;
    margin: 2em auto;
}

.u-center {
    text-align: center;
}

.wrapper {
    max-width: 960px;
    margin: 4% auto;
    width: 100%;
}

.calculator {
    border-radius: 1px;
    box-shadow: 0 1px 4px 0 rgba(0, 0, 0, 0.2);
    font-size: 1.8rem;
    letter-spacing: 5px;
    margin: 0 auto;
    padding: 20px;
    -webkit-box-shadow: 0 1px 4px 0 rgba(0, 0, 0, 0.2);
    width: 29rem;
}

.input {
    border: 1px solid #ddd;
    border-radius: 1px;
    font-size: 2.5rem;
    height: 60px;
    margin-right: 6px;
    overflow-x: auto;
    padding-right: 1rem;
    padding-top: 10px;
    text-align: right;
    transition: all .2s ease-in-out;
}

.input:hover {
    border: 1px solid #bbb;
    -webkit-box-shadow: inset 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
    box-shadow: inset 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
}

.operators div {
    display: inline-block;
    border: 1px solid #bbb;
    border-radius: 1px;
    width: 80px;
    text-align: center;
    padding: 10px;
    margin: 20px 4px 10px 0;
    cursor: pointer;
    background-color: #ddd;
    transition: border-color .2s ease-in-out, background-color .2s, box-shadow .2s;
}

.operators div:hover {
    background-color: #ddd;
    -webkit-box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
    box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
    border-color: #aaa;
}

.operators div:active {
    font-weight: bold;
}

.leftPanel {
    display: inline-block;
}

.numbers div {
    display: inline-block;
    border: 1px solid #ddd;
    border-radius: 1px;
    width: 80px;
    text-align: center;
    padding: 10px;
    margin: 10px 4px 10px 0;
    cursor: pointer;
    background-color: #f9f9f9;
    transition: border-color .2s ease-in-out, background-color .2s, box-shadow .2s;
}

.numbers div:hover {
    background-color: #f1f1f1;
    -webkit-box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
    box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
    border-color: #bbb;
}

.numbers div:active {
    font-weight: bold;
}

.equal {
    display: inline-block;
    border: 1px solid #3079ED;
    border-radius: 1px;
    width: 17%;
    text-align: center;
    padding: 127px 10px;
    margin: 10px 6px 10px 0;
    vertical-align: top;
    cursor: pointer;
    color: #FFF;
    background-color: #4d90fe;
    transition: all .2s ease-in-out;
}

.equal:hover {
    background-color: #307CF9;
    -webkit-box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
    box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
    border-color: #1857BB;
}

.equal:active {
    font-weight: bold;
}

<!doctype html>
<html class="no-js" lang="">
<head>
    <meta charset="utf-8">
    <meta http-equiv="x-ua-compatible" content="ie=edge">
    <title>Calculator</title>
    <meta name="description" content="">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <link rel="stylesheet" href="css/style.css">
</head>
<body>
<div class="wrapper">
    <div class="calculator">
        <div class="input" id="input"></div>
        <div class="buttons">
            <div class="operators">
                <div>+</div>
                <div>-</div>
                <div>*</div>
                <div>/</div>
            </div>
            <div class="leftPanel">
                <div class="numbers">
                    <div>7</div>
                    <div>8</div>
                    <div>9</div>
                </div>
                <div class="numbers">
                    <div>4</div>
                    <div>5</div>
                    <div>6</div>
                </div>
                <div class="numbers">
                    <div>1</div>
                    <div>2</div>
                    <div>3</div>
                </div>
                <div class="numbers">
                    <div>0</div>
                    <div>.</div>
                    <div id="clear">C</div>
                </div>
            </div>
            <div class="equal" id="result">=</div>
        </div>
    </div>
    <p class="u-center">
        Originally forked from: <a href="https://codepen.io/lalwanivikas/pen/eZxjqo">https://codepen.io/lalwanivikas/pen/eZxjqo</a>
    </p>
</div>
<script src="js/script.js"></script>
</body>
</html>

标签： javascripthtmlarraysarraylist

javascript - 在“点击”时将数字添加到数组中

问题描述

解决方案

推荐阅读