对于培训,我试图判断此代码库的输入值是否包含"@"当onBlur
:
<form>
<input
type='text'
name='my_input'
value={inputValue}
onChange={(e) => setInputValue(e.target.value)}
onBlur={(e) => checkEmail(e.target.value)}
></input>
<button>Save</button>
</form>
因此,我添加了一个函数,如果输入中没有"@",则在表单下方(或至少在输入字段下方)显示<div>
,但没有成功:????
function checkEmail(value) {
if (!value.includes('@')) {
<div>⚠️ Warning, there is no @, this is not a valid email address.</div>;
}
}
百知百还真.????
当输入无效时,如何获得表单或输入下方显示的<div>⚠️ Warning, there is no @, this is not a valid email address.</div>
?
提前谢谢.????