Angular2 Reactive表单 - 设置表单输入字段的默认值（输入类型=文件）？

Question

i have to set default image path into formbuilder but given exception. i have also try with empty string and null.

 buildForm() {
        this.userForm = this.formBuilder.group({
            location_id: this.formBuilder.control(null),
            image: this.formBuilder.control('assets/images-demo/avatars/user.png'),
        });
    }

ERROR DOMException: Failed to set the 'value' property on 'HTMLInputElement': This input element accepts a filename, which may only be programmatically set to the empty string.

Answer 1

Error says that it is not possible to set input programmatically for type='file' .

Only empty string is possible.

Many posts say that this is a security issue to change the input value for file type.

jQuery, Select Input FILE and also set it to another INPUT