Question

我正在尝试为长文本设置截断/显示按钮。但是按钮不起作用，错误消息为＆＃34;第15行出错未捕获TypeError：无法设置属性＆＃39; oneclick＆＃39; null。＆＃34;

第15行是＆＃34; button.onclick = function（）{＆＃34;

完整代码

//@Embedded
@Entity
public class Address extends AbstractDomainClass {

    private String addressLine1;
    private String addressLine2;
    private String city;
    private String state;
    private String zipCode;

    //new fields...
    private int addressType;
    @ManyToOne
    private Customer customer;
    // getters and setters ...
}

@Entity
public class Customer extends AbstractDomainClass {
    //other attributes...
    @OneToOne(mappedBy="customer", cascade=CascadeType.ALL)
    private Address billingAddress;
    @OneToOne(mappedBy="customer", cascade=CascadeType.ALL)
    private Address shippingAddress;
    //getters and setters...
}

Answer 1

<script>
window.onload = function(){

    var content = document.getElementById("content");
    var button = document.getElementById("show-more");

    button.onclick = function () {

        if(content.className == "open"){
            //shrink the box
            content.className = "";
            button.innerHTML = "SHOW MORE";
        } else {
            //expand the box
            content.className = "open";
            button.innerHTML = "SHOW LESS";
        }

    };
}
</script>

显示更多/更少按钮的Javascript未捕获类型错误

1 个答案: