遇到一个非常奇怪的问题.试图运行,fadeIn()但我收到错误".fadeIn不是一个函数".
我的代码:
body {
display:none;
}<!DOCTYPE html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
<link rel="stylesheet" href="css/custom.css">
</head>
<body>
Test
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js" integrity="sha384-b/U6ypiBEHpOf/4+1nzFpr53nxSS+GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script>
<script type="text/javascript">
$(document).ready(function(){
$('body').fadeIn();
})
</script>
</body>
</html>错误信息:
"TypeError: $('body').fadeIn is not a function. …给定输入str1为“ abc”，给定str2为“ def”，输出应为adbecf，给定str1 =“ ab”且str2 =“ def”的输出应为adbef
我的输出是：
merge（'abc'，'def'）“ adbecfNaN”
merge（'ab'，'def'）“ adbeundefinedf”
我一直在尝试过滤undefined和NAN，但是它不起作用。
这是我的代码：
function merge (str1, str2) {
var a = str1.split("").filter(Boolean);
var b = str2.split("");
var mergedString = '';
for(var i = 0; i <= a.length && i <= b.length; i++) {
mergedString += a[i] + b[i];
}
return mergedString;
}
我需要最好使用 lodash 将 init 数组转换为最终数组。
initArray = [
{
"date":"2017-08-15",
"data":[
{
"color":"orange",
"count":100
},
{
"color":"green",
"count":101
}
]
},
{
"date":"2017-08-14",
"data":[
{
"color":"orange",
"count":102
},
{
"color":"green",
"count":103
}
]
}
]
finalArray = [
{
"color":"orange",
"data":[
100,
102
]
},
{
"color":"green",
"data":[
101,
103
]
}
]
我正在进行正则表达式搜索文档中的所有大写字母.它收集它们并将它们放入一个阵列没问题.
我遇到的问题是我想替换该数组中的项目,以包括在数组中捕获的每个项目周围的范围,然后显示更新的结果.我尝试了很多东西.
我完全失去了.任何帮助表示赞赏.这是我的最后一次尝试
var allCaps = new RegExp(/(?:[A-Z]{2,30})/g);
var capsArray = [];
var capsFound;
while (capsFound = allCaps.exec(searchInput)) {
capsArray.push(capsFound[0]);
}
//for(var x = 0; x < capsArray.length; x++){
//var test = ;
capsArray.splice(0, '<span style="color:green">'+ capsArray +'</span>');
//}
}
我试图只使用javascript和HTML而没有外部库来制作一个简单的测验系统.但我遇到了一些问题.该脚本提供了错误的解决方案.即使我选择了正确的复选框,它也只输出1个正确答案.我不知道我到底做错了什么,或者是否有其他方法可以做到这一点.
<div class="quizsection">
<button onclick="startQuiz()" id="startQuiz">Start Quiz</button>
<div id="questions"></div>
</div>
<script>
//Create Array with questions and solutions
var allQuestions = [{
question: "Before Mt. Everest was discovered, whaich mountain was considered to be the highest mountain in the world?",
choices: ["Mt. Kilimanjaro", "Kanchenjunga", "Mount Everest"],
correctAnswer: 1
},
{
question: "Does England have a 4th of July?",
choices: ["Yes", "No", "I don't know"],
correctAnswer: 0
},
{
question: "What is Rupert the bear's middle name?",
choices: ["Bear", "He doesn't have …我正在尝试编写一个函数,该函数将字符串值返回大写,并带有toUpperCase()内置函数示例("hello"); 回归"你好"
没有这个:
var x="hello"
var y=x.toUpperCase();