How to implement color change in Angular

This article mainly introduces the core code of clicking the li tag in Angular to change the color. Friends who need it can refer to

Click the li tag after ng-repeat traversal to change the border color;

html code:

<ul ng-if="params.questionTypeId == 8">
<li class="gamePre-def" ng-repeat=" word in wordsDef" ng-click=&#39;li_click($index)&#39;
ng-class=&#39;{focus: $index == focus}&#39;> {{word}}</li>
</ul>

js code:

$scope.li_click = function (i) {
$scope.focus = i;
};

Description:

① In the click event of the 8b5f8b1972378d9df41b5958cd285f77 element, the "li_click()" method added in the $scope object will be executed;

② In this method, "$index (line number value)" will be executed Pass it to the method as an actual parameter, and set the "focus" attribute value to the "$index" value;

③So when a row8e22c81817d224bf490a20f8d20d8ac9 element is clicked, the "focus" attribute value will change is the corresponding "$index";

④At this time, the "ng-class" style instruction of the 25edfb22a4f469ecb59f1190150159c6 element specifies the style that needs to be added to the element through the key/value object. 8b5f8b1972378d9df41b5958cd285f77 element, the "$index" variable value is the same as the "focus" attribute value, which means that the return value of "$index==focus" is true;

⑤You should understand at this time Now, the style instruction value of "ng-class" changes to "focus";

⑥After the above analysis and operation, we have achieved the effect of adding a border when clicking the 8b5f8b1972378d9df41b5958cd285f77 element.

css style:

ul .focus {
border: 1px solid blue;
}

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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