angular 2的验证器模式

Question

如何将正确的验证字符串附加到此验证器。模式数组

   password: ['', 
    Validators.compose([
    Validators.minLength(8), 
    Validators.maxLength(20),
    Validators.pattern('/(?=.*[a-z])(?=.*[A-Z])(?=.*[^a-zA-Z])/') 
    ])],

Answer 1

为了使用验证器，你应该先使用FormControl，所以请遵循这段代码，不要忘记你应该将pattern作为字符串传递，而不是/:

import { FormControl, Validators } from '@angular/forms';
password: new FormControl(null, [
                Validators.required,
                Validators.minLength(8), 
                Validators.maxLength(20),
                Validators.pattern("(?=.*[a-z])(?=.*[A-Z])(?=.*[^a-zA-Z])")
            ]),