如何在角度4的<select2>标记中显示占位符？

Question

我的HTML代码是

<select2 [value]="student" (valueChanged)="studentvaluechanged($event)" [data]="data.getStudentList()"id="student" name="student" 
placeholder="Student Name*">
</select2>

Answer 1

使用jQuery

   $("#student").select2({
        placeholder: "Student Name*",
        allowClear: true
    });

或者您可以尝试

<select2 [value]="student" (valueChanged)="studentvaluechanged($event)" [data]="data.getStudentList()"id="student" name="student">Student Name*</select2>

Answer 2

我找到了解决方案。添加[options]="{ placeholder: 'Student Name*' }"后，它现在可以使用了。

<select2 [value]="student" (valueChanged)="studentvaluechanged($event)" [data]="data.getStudentList()"id="student" name="student" 
[options]="{ placeholder: 'Student Name*' }">
</select2>