我不明白为什么这两个运算符存在。在布尔比较的情况下 == 和 === 似乎都有效,但在枚举比较的情况下只有 '==' 有效:
<div class="interventionGroup">
<div class="interventionGroupHeader transition_1s" (click)="onClickHeader()">
{{GroupName}}
<div *ngIf="expanded == true" class="expand-icon"><i class="material-icons">expand_less</i></div> <!-- WORKS -->
<div *ngIf="expanded === false" class="expand-icon"><i class="material-icons expand-icon">expand_more</i></div> <!-- WORKS -->
</div>
<button *ngIf="GroupType == GroupTypeEnum.mesInterventions">dfdsfsd</button> <!-- WORKS -->
<div style="list-style-type:none" *ngIf="expanded === true">
<div *ngFor="let intervention of interventions"
(click)="onClick(intervention)">
<intervention-button [intervention]="intervention"></intervention-button>
</div>
</div>
</div>
在 javascript 中,运算符 '==' 仅检查相等性,而 '===' 检查类型和相等性
0 == '0' => true
0 === '0' => false
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