本篇内容主要讲解“javascript怎么实现编写网页版计算器”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“javascript怎么实现编写网页版计算器”吧!
本篇主要纪录的是利用javscript实现一个网页计算器的效果，供大家参考，具体内容如下
话不多说，代码如下：
首先是html的代码：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>利用js实现网页版计算器</title> <link rel="stylesheet" href="cal.css" ></head><body><div id="container" class="container"> <input id="result" class="result"> <div id="cal" class="clearfix"> <div id="num" class="fl"> <div id="top" class="clearfix"> <input id="clear" type="button" value="C"> <input id="antonyms" type="button" value="+/-"> <input id="remainder" type="button" value="%"> </div> <div id="bonttom" class="clearfix"> <input type="button" value="7"> <input type="button" value="8"> <input type="button" value="9"> <input type="button" value="4"> <input type="button" value="5"> <input type="button" value="6"> <input type="button" value="1"> <input type="button" value="2"> <input type="button" value="3"> <input class="zero" type="button" value="0"> <input type="button" value="."> </div> </div> <div id="math" class="fr math"> <input type="button" value="/" onclick="onclicknum('/')"> <input type="button" value="＊" onclick="onclicknum('*')"> <input type="button" value="＋" onclick="onclicknum('+')"> <input type="button" value="－" onclick="onclicknum('-')"> </div> <input id="res" type="button" value="＝"> </div></div></body></html>接下来是css样式代码：
* { margin: 0px; padding: 0px;}.clearfix:before, .clearfix:after { content: ''; display: block;}.clearfix:after { clear: both;}.clearfix { _zoom: 1;}input { display: block;}.container { width: 240px; height: 400px; border: 2px solid #eb4509; margin: 100px auto;}.fl { float: left;}.fr { float: right;}input { width: 60px; height: 60px; border: 1px solid #000; float: left; background: #ddd; font-size: 24px; color: #eb4509; -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box;}.math input { float: none;}input.zero { width: 120px;}#num { width: 180px;}#cal #math { width: 60px;}.result { width: 100%; height: 100px; line-height: 100px; border: none; background-color: #dfdfdf; font-size: 30px; float: none; outline: none; text-align: right; padding-right: 20px; -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box;}最后上js代码：
<script type="text/javascript"> var numresult; var str; var flag; var bot = document.getElementById("bonttom"); var botInputs = bot.getElementsByTagName("input"); var clear = document.getElementById("clear"); var res = document.getElementById("res"); var math = document.getElementById("math"); var mathInputs = math.getElementsByTagName("input"); var antonymsBtn = document.getElementById("antonyms"); var remainderBtn = document.getElementById("remainder"); //点击数字以及加减乘除 imporIn(botInputs);// imporIn(mathInputs); function imporIn(eles) { for (var i = 0; i < eles.length; i++) { eles[i].onclick = function () { onclicknum(this.value); } } } //点击清空c按钮 clear.onclick = function () { onclickclear(); } //点击＝号得到结果 res.onclick = function () { onclickresult(); } //点击＋／－ antonymsBtn.onclick = function () { antonyms(); } //点击％ remainderBtn.onclick = function () { remainder(); } function onclicknum(nums) { if (flag) { console.log("num=" + nums); if (nums !== "/" && nums !== "+" && nums !== "-" && nums !== "*") { str.value = ""; console.log("aa" + nums); } } flag = false; str = document.getElementById("result"); str.value = str.value + nums; } //清空 function onclickclear() { str = document.getElementById("result"); str.value = ""; } //得到结果 function onclickresult() { str = document.getElementById("result"); numresult = eval(str.value); str.value = numresult; flag = true; } //正负数 function antonyms() { str = document.getElementById("result"); str.value = -str.value; } //% function remainder() { str = document.getElementById("result"); str.value = str.value / 100; }</script>到此，相信大家对“javascript怎么实现编写网页版计算器”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
