自定义element-ui中的图标

<el-input v-model="loginForm.username" placeholder="用户名" type="text" prefix-icon="el-icon-login-user">

<el-input type="password" placeholder="密码" v-model="loginForm.password"
 @keyup.enter.native="login" prefix-icon="el-icon-login-password"></el-input>

/* 添加用户名密码小图标 */
.login-Box>>>.el-icon-login-user{
    background: url(../assets/img/user.png) center no-repeat;
    background-size: contain;
}
.login-Box>>>.el-icon-login-user:before{
    content: "\66ff";
    font-size: 16px;
    visibility: hidden;
}
.login-Box>>>.el-icon-login-password{
    background: url(../assets/img/password.png) center no-repeat;
    background-size: contain;
}
.login-Box>>>.el-icon-login-password:before{
    content: "替";
    font-size: 16px;
    visibility: hidden;
}
.login-Box>>>.el-input__prefix{
  left:10px;
}
.login-Box>>>.el-input--prefix .el-input__inner{
  padding-left: 40px;
}