在angular 6中更改动态输入中的密码指令内容？

Question

enter image description here

当用户给出大写字母时，删除指令中的大写单词，当给出特殊字符时，删除 spl 字符...，当字段为空时，显示旧指令。

Answer 1

<input type="password" (keyup)="error_message()" value='user_password'/> 
    <label>{{instruction}}</label> 
 error_message()
    {
        if(this.user_password=="")
        {
            this.instruction = "Password Need 6-13 Characters With Numbers,Uppercase,Spl Characters";
        }
        else
        {
            const regx              = new RegExp("(?=.*?[A-Z])");
            const Regx_speChar      = new RegExp("(?=.*?[#?!@$%^&*-])");
            const Regx_number       = new RegExp("(?=.*?[0-9])");

            const password_caps     = this.user_password.match(regx)?true:false;
            const password_splcase  = this.user_password.match(Regx_speChar)?true:false;
            const password_numbers  = this.user_password.match(Regx_number)?true:false;

            if( password_caps!=true && password_splcase!=true && password_numbers!=true)
            {
                this.instruction = "Password Need 6-13 Characters With Numbers,Uppercase,Spl Characters";
            }
            else if( password_caps==true && password_splcase !=true && password_numbers !=true )
            {
                this.instruction = "Password Need 6-13 Characters With Numbers,Spl Characters";
            }
            else if( password_caps!=true && password_splcase==true && password_numbers !=true)
            {
                this.instruction = "Password Need 6-13 Characters With Numbers,Uppercase";
            }
            else if( password_caps!=true && password_splcase!=true && password_numbers==true )  
            {
                this.instruction = "Password Need 6-13 Characters With Uppercase,Spl Characters";
            }
            else if( password_caps==true && password_splcase==true && password_numbers!=true )
            {
                this.instruction = "Password Need 6-13 Characters With Numbers";
            }
            else if( password_caps==true && password_splcase !=true && password_numbers==true )
            {
                this.instruction = "Password Need 6-13 Characters With Spl Characters";
            }   
            else if( password_caps!=true && password_splcase==true && password_numbers==true )
            {
                this.instruction = "Password Need 6-13 Characters With Uppercase";
            }   
            else if( password_caps==true && password_splcase==true && password_numbers==true )
            {
                this.instruction = "";
            }
        }

在angular 6中更改动态输入中的密码指令内容？

Change the password Instruction Content in Dynamically based input in angular 6?

angular6