关于javascript:正则提取列表框邮箱地址批量发送

var str = ""
$('.d_post_content ').each((index,dom)=>{
    
    let text =  new RegExp("[0-9a-z]+@[a-z]+.[a-z]+").exec($(dom).text());
    if(text){str+=text[0]+"\r\n"}
})
console.log(str)