Javascript 在HTML与if/else statemets中的插值会产生AngularJS问题
我的看法是:Javascript 在HTML与if/else statemets中的插值会产生AngularJS问题,javascript,html,angularjs,Javascript,Html,Angularjs,我的看法是: <!doctype html> <html lang="en" ng-app="LunchCheck"> <head> <title>Lunch Checker</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <script src="angular.min.js">
<!doctype html>
<html lang="en" ng-app="LunchCheck">
<head>
<title>Lunch Checker</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="angular.min.js"></script>
<script src="app.js"></script>"
<link rel="stylesheet" href="styles/bootstrap.min.css">
<style>
.message { font-size: 1.3em; font-weight: bold; }
</style>
</head>
<body>
<div class="container" ng-controller="LunchCheckController">
<h1>Lunch Checker</h1>
<div class="form-group" >
<input id="lunch-menu" type="text"
placeholder="list comma separated dishes you usually have for lunch"
class="form-control" ng-model="input">
</div>
<div class="form-group">
<button class="btn btn-default" ng-click="stack()">
Check If Too Much
</button>
</div>
<div class="form-group message" id="result">
<!-- Your message can go here. -->
{{message}}
</div>
</div>
</div>
</div>
</body>
</html>
我是一个完全的初学者,但我不确定我做错了什么。抱歉,如果它很乱,我可能已经粘贴和编辑太多了
基本上,当我试图在浏览器中打开它时,我会在输入窗口下看到两个大括号,上面写着{{message}
基本上,当我试图在浏览器中打开它时,我会在输入窗口下看到两个大括号,上面写着{{message}
当您看到双花括号({{}}
)时,通常意味着没有加载AngularJS框架
检查开发人员控制台中的错误消息。
未捕获的语法错误:意外标记{app.js:20
问题出在第20行:
function LunchCheckController ($scope) {
$scope.input = "";
$scope.message = "";
$scope.stack = function($scope, input) {
var array = $scope.input.split(',');
if (array.length <= 3) {
$scope.message = "Enjoy";
} else if (array.length > 3){
$scope.message = "Please stop!";
̶}̶ ̶e̶l̶s̶e̶ ̶(̶$̶s̶c̶o̶p̶e̶.̶i̶n̶p̶u̶t̶ ̶=̶=̶ ̶"̶ ̶"̶ ̶|̶|̶ ̶N̶u̶l̶l̶ ̶)̶ ̶{̶
} else {
$scope.message = "Please enter something."
}
};
}
功能控制器($scope){
$scope.input=“”;
$scope.message=“”;
$scope.stack=函数($scope,input){
var数组=$scope.input.split(',');
if(数组长度3){
$scope.message=“请停止!”;
7月7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7){
}否则{
$scope.message=“请输入一些内容。”
}
};
}
else
不接受条件,使用:else if…
该语句也可以改进:else if(!$scope.input.trim()){//Do Stuff}
事件进一步,您可以设置$scope.input
到请在IF
语句之前输入一些内容,然后去掉else。您可以显示您的配置吗?看看这个plunker示例,您将了解插值是如何发生的
else ($scope.input == " " || Null ) {
$scope.message = "Please enter something."
}
function LunchCheckController ($scope) {
$scope.input = "";
$scope.message = "";
$scope.stack = function($scope, input) {
var array = $scope.input.split(',');
if (array.length <= 3) {
$scope.message = "Enjoy";
} else if (array.length > 3){
$scope.message = "Please stop!";
̶}̶ ̶e̶l̶s̶e̶ ̶(̶$̶s̶c̶o̶p̶e̶.̶i̶n̶p̶u̶t̶ ̶=̶=̶ ̶"̶ ̶"̶ ̶|̶|̶ ̶N̶u̶l̶l̶ ̶)̶ ̶{̶
} else {
$scope.message = "Please enter something."
}
};
}