输入空格时如何触发 ng-change? [英] How can I trigger ng-change when a space is entered?

问题描述

我有一个函数，当 textarea 的值发生变化时会调用该函数.它工作得很好，除非按下空格键，然后什么都不调用.有没有办法激活这个?从技术上讲，内容正在发生变化，我希望无论如何调用该函数.

I have a function that is called when a textarea's value is changed. It works great, except when the spacebar is pressed, then nothing is called. Is there a way to activate this? Technically, the content is changing, and I would like the function to be called regardless.

我附上了一段代码.您可以看到 $scope.log 数组在按下空格键时不会推送新元素(输入键也是如此)，但它会推送任何其他非空格键.

I am attaching a fiddle with the code. You can see the $scope.log array does not push a new element when the spacebar is pressed (enter key as well), but it does with any other key that is not white space.

小提琴示例:http://jsfiddle.net/UJWLN/4/

推荐答案

您可以在输入中使用指令 ng-trim 并将其设置为 false，如下所示:

You can use the directive ng-trim in your input and set it to false, like this:

<textarea ng-change="changeFunction()" ng-model="myModel" ng-trim="false"></textarea>

但这并不适用于所有情况.如果您希望在每次击键时执行某些操作，请尝试使用自定义指令.我为你写了一篇:

But this won't work for every case. If you want something to be executed on every single keystroke, try with a custom directive. I wrote one for you:

http://jsfiddle.net/UJWLN/6/

myApp.directive('ngKeystroke', function(){
    return {
        restrict: 'A',
        link: function(scope, elem, attrs){
            elem.bind("keyup", function(){
                scope.log.push('called');
                scope.$digest(); 
            });
        }
    };
});

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