当我们用一个null值初始化一个ref,但在其类型中不包括null时,就会发生"Cannot assign to 'current' because it is a read-only property"错误。为了解决该错误,请在ref的类型中包含null。比如说,const ref = useRef<string | null>(null)。 react-cannot-assign-to-current-because-read-only.png 这里有个例...
这里有个例子来展示错误是如何发生的。 // App.tsximport{useEffect, useRef}from'react';constApp= () => {constref = useRef<string>(null);useEffect(() =>{// ⛔️ Error: Cannot assign to 'current' because it is a read-only property.ts(2540)ref.current='hello'; }, []);return(<di...
angular 报错 Cannot assign to a reference or variable! 原因: 1 <input type="text"name="password"[(ngModel)]="password"#password="ngModel" required> 上述代码中的[(ngModel)] 与#password不能取相同的名称 多提一嘴:如果表单是通过循环产生的,再默认赋值的时候若没有赋值成功,可能是因为name不是唯...
. 17:24:17,066 ERROR [org.jgroups.protocols.UDP] (OOB-4,shared=udp) failed sending message to slave:server-four/ejb (130 bytes): java.lang.Exception: dest=/0.0.0.0:55200 (133 bytes), cause: java.net.BindException: Cannot assign requested address: Datagram send failed JBoss log shows t...
当我们使用 null 值初始化 ref 并且在其类型中不包含 null 时,会出现错误“Cannot assign to 'current' because it is a read-only property”。 要解决该错误,请在 ref 的类型中包含 null,例如const ref = useRef<string | null>(null)。 下面是一个错误发生的示例。
看错误提示应该是字体没有设置，或者字体文件损坏。你看看字体相关方面的设置 不
The following example demonstrates a situation in which this error is generated.JavaScript Copy myFunction() = 42; // Attempting to assign the value 42 to the result of the function call. To correct this errorDo not use the value of a function call result as something you can assign to...
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①. cannot assign a value to final variable number ; ②. java.lang.ArithmeticException: / by zero ; ③. non-static variable c cannot be referenced from a static context ;相关知识点: 试题来源: 解析 正确答案:①不能修改final声明过的变量。②除数不能为零。③非静态的变量C不能被静态的内容引用...
SelectExport to a file, and then clickNext. SelectOutlook Data File (.pst), and then clickNext. Make sure that the folder in the shared mailbox that you want to move is selected, enableInclude subfolders, and then clickNext. ClickBrowse. ...