javascript - 启动定时器时不显示时间
问题描述
当我输入某个时间时,我的计时器没有显示,我已经检查了几次问题可能是什么,但没有错误。我不确定它是否与javascript代码有关。
其他一切都很好,例如提交、继续和停止的按钮。
这是 HTML 代码:
<!DOCTYPE html>
<html>
<head>
<title>CountDown</title>
<link rel="stylesheet" type="text/css" href="style.css">
<link href="https://fonts.googleapis.com/css?family=Poppins&display=swap" rel="stylesheet">
</head>
<body>
<header>
<h1>CountDown</h1>
</header>
<div class="content">
<div class="counter"></div>
<input type="number" id="seconds" placeholder="Seconds">
<div class="buttons">
<button class="btn start" id="start" value="1" onclick="check(this)">Start</button>
<button class="btn start" id="continue" value="1" onclick="check(this)">Continue</button>
<button class="btn stop" id="stop" value="0" onclick="check(this)">Stop</button>
<button class="btn start" id="ok" onclick="toSubmit()">Submit</button>
</div>
</div>
<script type="text/javascript" src="main.js"></script>
</body>
</html>
这是javascript代码:
const container = document.querySelector('.counter');
const buttonsDiv = document.querySelector('.buttons');
const secInput = document.getElementById('.seconds');
var seconds;
var remseconds;
var minuts;
var toCount = false;
function toSubmit(){
display('start');
remove('seconds');
remove('ok');
seconds = Number(secInput.value);
counting();
}
function display(e){
document.getElementById(e).style.display = 'block';
}
function remove(e){
document.getElementById(e).style.display = 'none';
}
function check(stat){
toCount = this.value;
if(stat.id == "start"){
display("stop");
remove("start");
}
else if(stat.id == "stop"){
display("continue");
remove("stop");
}
else{
display("stop");
remove("continue");
}
}
function count(){
if(seconds > 0){
if(toCount == true){
seconds--;
remseconds = seconds % 60;
minuts = Math.floor(seconds / 60);
if(minuts < 10){
minuts = "0" + minuts;
}
if(remseconds < 10){
remseconds = "0" + remseconds;
}
container.innerHTML = minuts + " : " + remseconds;
}
}
else{
container.innerHTML = "DONE!";
buttonsDiv.style.opacity = "0";
}
}
function counting(){
remseconds = seconds % 60;
minuts = Math.floor(seconds / 60);
if(remseconds < 10){
remseconds = "0" + remseconds;
}
container.innerHTML = minuts + " : " + remseconds;
setInterval(count, 1000);
}
这是CSS代码:
*{
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Poppins', sans-serif;
}
html, body{
height: 100%;
}
body{
width: 100%;
height: 100%;
background: linear-gradient(to left top, #0045D6, #00A9f6);
}
header{
width: 100%;
height: 13vh;
background-color: #fff;
color: #0045F6;
display: flex;
justify-content: center;
align-items: center;
}
.content{
width: 100%;
height: 60vh;
font-size: 3rem;
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
}
.content #seconds{
width: 250px;
font-size: 2rem;
padding: 1rem;
outline: none;
background: none;
border: none;
border-bottom: 3px solid #fff;
color: #fff;
}
#seconds::placeholder{
color: #ddd;
font-size: 1.7rem;
}
.btn{
background-color: #fff;
border-radius: 4px;
border: none;
outline: none;
cursor: pointer;
padding: 0.8rem 1.7rem;
font-size: 1.2rem;
font-weight: 700;
}
.start{
color: #1f0;
}
.stop{
color: #E00;
}
#start, #stop, #continue{
display: none;
}
.counter{
color: #fff;
}
解决方案
您的选择器错误:const secInput = document.getElementById('.seconds')
; 用于.
上课。将此行更改如下const secInput = document.getElementById('seconds')
:
编辑后:好的。看看下面的代码片段:toCount
变量的使用不正确。
const container = document.querySelector('.counter');
const buttonsDiv = document.querySelector('.buttons');
const secInput = document.getElementById('seconds');
var seconds;
var remseconds;
var minuts;
var toCount = false;
function toSubmit(){
display('start');
remove('seconds');
remove('ok');
seconds = Number(secInput.value);
counting();
}
function display(e){
document.getElementById(e).style.display = 'block';
}
function remove(e){
document.getElementById(e).style.display = 'none';
}
function check(stat){
if(stat.id == "start"){
display("stop");
remove("start");
toCount = true;
}
else if(stat.id == "stop"){
display("continue");
remove("stop");
toCount = false;
}
else{
display("stop");
remove("continue");
toCount =true;
}
}
function count(){
if(seconds > 0){
if(toCount == true){
seconds--;
remseconds = seconds % 60;
minuts = Math.floor(seconds / 60);
if(minuts < 10){
minuts = "0" + minuts;
}
if(remseconds < 10){
remseconds = "0" + remseconds;
}
container.innerHTML = minuts + " : " + remseconds;
}
}
else{
container.innerHTML = "DONE!";
buttonsDiv.style.opacity = "0";
}
}
function counting(){
remseconds = seconds % 60;
minuts = Math.floor(seconds / 60);
if(remseconds < 10){
remseconds = "0" + remseconds;
}
container.innerHTML = minuts + " : " + remseconds;
setInterval(count, 1000);
}
*{
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Poppins', sans-serif;
}
html, body{
height: 100%;
}
body{
width: 100%;
height: 100%;
background: linear-gradient(to left top, #0045D6, #00A9f6);
}
header{
width: 100%;
height: 13vh;
background-color: #fff;
color: #0045F6;
display: flex;
justify-content: center;
align-items: center;
}
.content{
width: 100%;
height: 60vh;
font-size: 3rem;
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
}
.content #seconds{
width: 250px;
font-size: 2rem;
padding: 1rem;
outline: none;
background: none;
border: none;
border-bottom: 3px solid #fff;
color: #fff;
}
#seconds::placeholder{
color: #ddd;
font-size: 1.7rem;
}
.btn{
background-color: #fff;
border-radius: 4px;
border: none;
outline: none;
cursor: pointer;
padding: 0.8rem 1.7rem;
font-size: 1.2rem;
font-weight: 700;
}
.start{
color: #1f0;
}
.stop{
color: #E00;
}
#start, #stop, #continue{
display: none;
}
.counter{
color: #fff;
}
<head>
<title>CountDown</title>
<link href="https://fonts.googleapis.com/css?family=Poppins&display=swap" rel="stylesheet">
</head>
<body>
<header>
<h1>CountDown</h1>
</header>
<div class="content">
<div class="counter"></div>
<input type="number" id="seconds" placeholder="Seconds">
<div class="buttons">
<button class="btn start" id="start" value="1" onclick="check(this)">Start</button>
<button class="btn start" id="continue" value="1" onclick="check(this)">Continue</button>
<button class="btn stop" id="stop" value="0" onclick="check(this)">Stop</button>
<button class="btn start" id="ok" onclick="toSubmit()">Submit</button>
</div>
</div>
</body>
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