逃脱HTML和空白？

Question

用户输入保存在$scope.userInput中。我想检查用户是否在输入中输入了任何内容，但我想忽略空格和HTML标记，并仅检查其他类型的输入。

我该怎么做？

Answer 1

＆＃13; ＆＃13; var regex = /（＆lt;（[^＆gt;] +）＆gt;）| \ s / ig;＆＃13; var string =＆＃34;测试空格和＆lt; p＆gt; HTML标签＆lt; / p＆gt;＆＃34;;＆＃13; var result = string.replace（regex，＆＃34;＆＃34;）;＆＃13; 的console.log（结果）; // TestwhitespaceandHTMLtags＆＃13; ＆＃13; ＆＃13;

Answer 2

// Input string
$scope.userInput = "<h1>My input</h1>";

// Removed HTML tags from the string.
var removedTagStr = $scope.userInput.replace(/(<([^>]+)>)/ig,'');

// Removed the white spaces from the string.
var result = removedTagStr.replace(/ /g,'');

console.log(result); // Myinput

正则表达式(<([^>]+)>)：

的说明

----------------------------------------------------------------------
(                        group and capture to \1:
----------------------------------------------------------------------
<                        '<'
----------------------------------------------------------------------
(                        group and capture to \2:
----------------------------------------------------------------------
[^>]+                    any character except: '>' (1 or more
                         times (matching the most amount
                         possible))
----------------------------------------------------------------------
)                        end of \2
----------------------------------------------------------------------
>                        '>'
----------------------------------------------------------------------
)                        end of \1
----------------------------------------------------------------------
)                        end of grouping
----------------------------------------------------------------------

工作演示：

＆＃13;

＆＃13;

var myApp = angular.module('myApp',[]);

myApp.controller('MyCtrl',function($scope) {
    $scope.userInput = "<h1>My input</h1>";

var removedTagStr = $scope.userInput.replace(/(<([^>]+)>)/ig,'');

$scope.result = removedTagStr.replace(/ /g,'');

});

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp" ng-controller="MyCtrl">
  {{result}}
</div>

＆＃13;

＆＃13;

＆＃13;