How to use ng-switchh to display different contents according to different array lengths. If you use arr.length as the judgment condition, you need to write a lot of situations, so I considered using true as the judgment condition, but I don’t know how to write ng-switch-when , of course it can also be achieved using ng-if, but I have a question about how to write ng-switch, thank you.
The code is as follows:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>title</title>
<script src="angular.js"></script>
<style>
</style>
</head>
<body ng-app="App">
<p ng-controller="Ctrl">
<p ng-switch="arr.length">
<span ng-switch-when="1">1</span>
<span ng-switch-when="2">2</span>
<span ng-switch-when="3">3</span>
</p>
<p>
<span ng-if="arr.length<2">1---</span>
<span ng-if="arr.length>=2">2---</span>
</p>
<p ng-switch=true>
<span ng-switch-when="(arr.length==0)"> 1---true </span>
<span ng-switch-when="(arr.length==0)"> 2---true </span>
</p>
</p>
<script>
var App = angular.module("App", []);
App.controller("Ctrl", ["$scope", function ($scope) {
$scope.arr = [1, 2,3];
}]);
</script>
</body>
</html>
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