我正在运行es6类函数来重新设计我的身份验证页面。当用户单击“立即注册”链接时，应该运行showRegisterSection函数，以便它从auth页面的登录部分切换到注册部分。但是，问题在于，当我尝试访问在构造函数和该类的其他函数中初始化的局部变量以执行一些重新设计任务时，浏览器控制台返回“函数名称不是函数”和“未定义” ”的值。我尝试了不同的功能并在线搜索解决方案，但无济于事。此外，如果我将代码复制到函数内部，然后将其粘贴到事件处理程序“ showRegisterSection”中，或者在事件处理程序中重新分配变量，则一切都会按预期进行。请记住，设计登录部分的第一个函数“ ShowLoginSection”可以正常工作，而不是从事件中调用。它也是设置调用showRegisterFunction的click事件的函数。
您的帮助将不胜感激
下面提供了代码...
removeElement,
insert_custom_social_login_before_target_Element
} from './util';
export default class GulaitAuth{
//if the isLogin variable is true, then we set up the login part else, we set up the register part
constructor(isLoginSection, loginForm){
this._isLoginSection = isLoginSection;
this._loginForm = loginForm;
this.initLocalVars();
}
/**
* This function initializes local variables to their supposed values
* except those passed in on creation of class obj.
* This is due to an unknown issue where variables simply get reset to undefined
*/
initLocalVars(){
this._loginDiv = document.querySelector('.woocommerce #customer_login').firstElementChild;
this._registerDiv = document.querySelector('.woocommerce #customer_login').lastElementChild;
this._myAccHeader = document.querySelector( '.woocommerce-account #main #contents header h2' );
this._socialLoginContainer = document.querySelector( '#customer_login .apsl-login-networks.theme-2.clearfix' );
this._authPageLoginForm = document.querySelector( '.woocommerce-page #customer_login form.login' );
}
setupAuthPage(){
//setup the authentication page
//css styles for Auth page if the loginForm exists on the page
if( this._loginForm ){
//remove header "MY ACCOUNT" from DOM
removeElement(this._myAccHeader);
//center the auth div
jQuery('body.page-id-29 .container .row.sidebar-row').css('text-align', 'center');
//style the Auth div - container
jQuery('.woocommerce-account #contents').css({
'max-width' : '38.5em',
'display': 'inline-block',
'text-align': 'initial',
'padding': '1.5em',
'border-top' : '.15em solid #DF1F26e5'
});
if( this._isLoginSection ){
this.showLoginSection();
} else {
this.showRegisterSection();
}
}
}
/**
* Show Login or Register Section based on _isLoginSection variable
*/
showLoginOrRegister(){
if(this._isLoginSection){
//edit the login div
jQuery(this._loginDiv).css( {'min-width' : '100%', 'padding' : '0', 'display' : 'block'} );
//hide the register div
jQuery(this._registerDiv).css( 'display', 'none' );
} else {
//hide the login div
jQuery(this._loginDiv).css( 'display', 'none' );
//edit the register div
jQuery(this._registerDiv).css( {'min-width' : '100%', 'padding' : '0', 'display' : 'block'} );
}
}
showLoginSection(){
//show loginsection
this.showLoginOrRegister();
//remove full width on checkbox
jQuery('.woocommerce #customer_login form.login input[type="checkbox"]').css('min-width', '0 !important');
//remove extra spacing to the right
jQuery('.woocommerce-account #main #contents .type-page').css('padding', '0');
//row containing login and register forms is slightly pushed to the left with margin
//this makes styling difficult as it has wierd positioning
jQuery('div#customer_login.row').css('margin', '0');
//remove extra space after the 'lost password?' section
jQuery('.entry .entry-content .entry-summary').css('margin-bottom', '0');
//remove login form margin
jQuery('.woocommerce-page #customer_login form.login').css('margin', '0');
//edit the login text
jQuery('.woocommerce #customer_login h2')
.css( {
'border-bottom' : '0',
'margin-bottom' : '0',
'padding-bottom' : '0.2em'
} )
.text('')
.append(
'<span id="login-text">Login</span><span id="or-text"> Or </span><span id="register-text">Register</span>'
);
jQuery('#or-text, #register-text').css( {
'opacity' : '.2',
'font-size' : '16px',
'word-spacing' : '.12em',
'font-weight' : '450'
} );
//Insert REGISTRATION Link after 'lost password' section
jQuery("<p style='margin-top: 2em;'>Don't have an account? <strong id='register-link'><a href='#'>Register now</a></strong></p>")
.insertAfter("#customer_login .login p.lost_password")
.children("#register-link").click( showRegisterSection );
//add an eventListener on the register link
//jQuery('#register-link');
//redesign the input form input fields
jQuery('#customer_login .login .form-row.form-row-wide input').css( {
'border' : '1px solid #ccc',
'background' : 'white'
} );
//fb color = #1c74bc
//Delete original social login and replace with custom version in the
//prefered position
this.relocateSocialLogin();
}
showRegisterSection(){
console.log('Register Link clicked');
//set isLogin to false in order to show content as designed for the register form
this._isLoginSection = false;
//This function initializes local variables to their supposed values except
//those passed in on creation of class obj.
//This is due to an unknown issue where variables simply get reset to undefined
this.initLocalVars()
//show register section
//hide the login div
jQuery(this._loginDiv).css( 'display', 'none' );
//edit the register div
jQuery(this._registerDiv).css( {'min-width' : '100%', 'padding' : '0', 'display' : 'block'} );
}
/**
* Delete original social login and replace with custom version in the
* prefered position to fit design
*/
relocateSocialLogin(){
//Delete existing social login
this._socialLoginContainer.parentNode.removeChild( this._socialLoginContainer );
//Insert custom social login just before login form on auth page = my-account page
insert_custom_social_login_before_target_Element( this._authPageLoginForm );
}
} ```
您必须将this引用保留在showLoginSection()内部定义的点击处理程序中>
写为：.children("#register-link").click( showRegisterSection );
使用箭头功能：.children("#register-link").click( e => this.showRegisterSection(e));然后，将保留this内部任何this的showLoginSection()参考。 （我们的身份验证实例）
替代方案是.bind()的变体所以.children("#register-link").click( this.showRegisterSection.bind(this));]内的showLoginSection()
或this.showRegisterSection = this.showRegisterSection.bind(this);内的constructor(isLoginSection, loginForm){。
[对于所有将用作事件处理程序的函数，或在其他情况下未将该函数作为GulaitAuth类的方法调用的其他情况，都必须这样做。