我正在使用module.exports将React.js组件转换为Common.js模块，并且在访问＆＃34;这个＆＃34;在其中一个方法的组成元素的上下文中。
以下是整个组件。我在发生问题的行上方发表了评论。我一开始尝试了一个不那么详细的例子，但我认为这不足以解释这个问题。
var React = require('react');
var GSAP = require('gsap');
var Psychedelicon = React.createClass({
cycleColors: function() {
var touchPlatforms = ['iPhone', 'iPad', 'iPod', 'Android', 'Linux armv7l', 'WinCE'];
isTouch = false;
iDevice = false;
isDroid = false;
plat = navigator.platform;
if(plat === 'iPhone' || plat === 'iPad' || plat === 'iPod') {
isTouch = true;
iDevice = true;
}
else if (plat === 'Linux armv7l' || plat === 'Android') {
isTouch = true;
isDroid = true;
}
else {
for (var i = 0; i < touchPlatforms.length; i++) {
if (plat === touchPlatforms[i]) {
isTouch = true;
break;
}
else {
isTouch = false;
}
}
}
var isIE = false
if (navigator.userAgent.toLowerCase().indexOf('msie') > -1 || navigator.userAgent.toLowerCase().indexOf('trident') > -1) {
isIE = true
}
var isFF = false
if (navigator.userAgent.toLowerCase().indexOf('firefox') != -1) {
isFF = true
}
if(!isTouch) {
var ColorSwirl = function(colorSet,defaultColor,time) {
var storedResult;
var randomColor = function(theArray) {
var result = theArray[Math.floor(Math.random() * (theArray.length))];
if(result === storedResult){
return(defaultColor)
}
else {
storedResult = result;
return(result);
}
}
var theLuckyColors = {top:randomColor(colorSet),bottom:randomColor(colorSet)};
var swirl = function(){
//!!!!On this line the problem occurs onUpdateParams must reference the element accepting the execution event (onMouseEneter)
TweenLite.to(theLuckyColors, time, {colorProps:{top:randomColor(colorSet), bottom:randomColor(colorSet)}, onUpdate:colorize, onUpdateParams:[this],onComplete:swirl});
}
gradients
var colorize = function(el) {
if(isIE) {
TweenLite.set(el, {
backgroundImage:'-ms-radial-gradient(center,circle cover,' + theLuckyColors.top + ' 0%, ' + theLuckyColors.bottom + ' 100%)'
});
}
else if(isFF) {
TweenLite.set(el, {
backgroundImage:'-moz-radial-gradient(center,circle cover,' + theLuckyColors.top + ' 0%, ' + theLuckyColors.bottom + ' 100%)'
});
}
else {
TweenLite.set(el, {
backgroundImage:'radial-gradient(circle,' + theLuckyColors.top + ', ' + theLuckyColors.bottom + ')',
backgroundImage:'-webkit-radial-gradient(circle,' + theLuckyColors.top + ', ' + theLuckyColors.bottom + ')'
});
}
}
swirl();
}
ColorSwirl(['red','green','#4B0082','#9F00FF','yellow','orange'],'blue',.15);
}
},
stopTheCycle: function() {
},
render: function() {
return (
<a className="psychedelicon" href={this.props.href} target={this.props.target} onMouseEnter={this.cycleColors} onMouseLeave={this.stopTheCycle}>
<i className={"fa fa-" + this.props.icon}></i>
</a>
)
}
});
module.exports = Psychedelicon;
到目前为止，我试图绑定＆＃34;这个＆＃34;到接收事件的元素：
onMouseEnter={this.cycleColors.bind(this)}
我得到了：＆＃39;您正在将组件方法绑定到组件。 React会以高性能方式自动为您执行此操作，因此您可以安全地删除此呼叫。＆＃39;
我也尝试过：
onMouseEnter={this.cycleColors.call(Psychedelicon)}
和 OnMouseEnter在= {this.cycleColors.bind（Psychedelicon）}
两者都没有产生错误但没有工作
我知道这个功能起作用，因为我改变了
onUpdateParams:[this]
到
onUpdateParams:['.psychedelicon']
组件产生所需的行为，除了它同时影响所有组件（我需要避免因此需要使用＆＃34;这个＆＃34;）。
我一定错过了什么。任何帮助表示赞赏。
答案 0 :(得分：1)
更新：此答案不适用于React，但是针对该问题的更一般的先前版本做出回应。
这看起来像是不使用onclick属性的另一个参数，但您可以使用call或apply方法，并将this作为第一个参数传递。< / p>
<div id="foo" onClick="Module.addClass.call(this)"></div>
但是，您可能需要考虑使用addEventListener或jQuery的事件委派。
答案 1 :(得分：1)
所以我能够解决自己的问题。这是诀窍的代码：
var React = require('react');
var GSAP = require('gsap');
var $ = require('jquery')
var Psychedelicon = React.createClass({
componentDidMount: function() {
var that = React.findDOMNode(this.refs.psicon);
$(that).hover(function() {
//detect device type for Psychedelicon
var touchPlatforms = ['iPhone', 'iPad', 'iPod', 'Android', 'Linux armv7l', 'WinCE'];
isTouch = false;
iDevice = false;
isDroid = false;
plat = navigator.platform;
if(plat === 'iPhone' || plat === 'iPad' || plat === 'iPod') {
isTouch = true;
iDevice = true;
}
else if (plat === 'Linux armv7l' || plat === 'Android') {
isTouch = true;
isDroid = true;
}
else {
for (var i = 0; i < touchPlatforms.length; i++) {
if (plat === touchPlatforms[i]) {
isTouch = true;
break;
}
else {
isTouch = false;
}
}
}
//sniff the for ie
var isIE = false
if (navigator.userAgent.toLowerCase().indexOf('msie') > -1 || navigator.userAgent.toLowerCase().indexOf('trident') > -1) {
isIE = true
}
//sniff for firefox
var isFF = false
if (navigator.userAgent.toLowerCase().indexOf('firefox') != -1) {
isFF = true
}
//Begin ColorSwirl on non-touch devices
if(!isTouch) {
//Define the Color Sets
var ColorSwirl = function(colorSet,defaultColor,time) {
//Pick random color. If the color is the same as the previous one pick blue instead.
var storedResult;
var randomColor = function(theArray) {
var result = theArray[Math.floor(Math.random() * (theArray.length))];
if(result === storedResult){
return(defaultColor)
}
else {
storedResult = result;
return(result)
}
}
//Pick our colors for the initial state
var theLuckyColors = {top:randomColor(colorSet),bottom:randomColor(colorSet)};
//Start swirling
$(that).addClass('swirling');
var swirl = function(){
if($(that).hasClass('swirling')) {
TweenLite.to(theLuckyColors, time, {colorProps:{top:randomColor(colorSet), bottom:randomColor(colorSet)}, onUpdate:colorize, onUpdateParams:[that],onComplete:swirl});
}
}
//Detect Browser and Pass Psychedelicon the appropriate radial gradients
var colorize = function(el) {
if(isIE) {
TweenLite.set(el, {
backgroundImage:'-ms-radial-gradient(center,circle cover,' + theLuckyColors.top + ' 0%, ' + theLuckyColors.bottom + ' 100%)'
});
}
else if(isFF) {
TweenLite.set(el, {
backgroundImage:'-moz-radial-gradient(center,circle cover,' + theLuckyColors.top + ' 0%, ' + theLuckyColors.bottom + ' 100%)'
});
}
else {
TweenLite.set(el, {
backgroundImage:'radial-gradient(circle,' + theLuckyColors.top + ', ' + theLuckyColors.bottom + ')',
backgroundImage:'-webkit-radial-gradient(circle,' + theLuckyColors.top + ', ' + theLuckyColors.bottom + ')'
});
}
}
swirl();
}
ColorSwirl(['red','green','#4B0082','#9F00FF','yellow','orange'],'blue',.15);
}
},function() {
var theLuckyColors = {top:'#FFFFFF',bottom:'#FFFFFF'};
var stopNow = function(time){
$(that).removeClass('swirling');
TweenLite.to(theLuckyColors, time, {colorProps:{top:'#FFFFFF', bottom:'#FFFFFF'}, onUpdate:whiteWash, onUpdateParams:[that]});
}
var whiteWash = function(el) {
TweenLite.set(el, {
backgroundImage:'-ms-radial-gradient(center,circle cover,#FFFFFF 0%, #FFFFFF 100%)',
backgroundImage:'-moz-radial-gradient(center,circle cover,#FFFFFF 0%, #FFFFFF 100%)',
backgroundImage:'radial-gradient(circle,#FFFFFF,#FFFFFF)',
backgroundImage:'-webkit-radial-gradient(circle,#FFFFFF,#FFFFFF)'
});
}
stopNow(.15);
});
},
render: function() {
return (
<a className="psychedelicon" ref="psicon" href={this.props.href} target={this.props.target} onMouseEnter={this.cycleColors} onMouseLeave={this.stopTheCycle}>
<i className={"fa fa-" + this.props.icon}></i>
</a>
)
}
})
module.exports = Psychedelicon;
以下是我从问题到解决方案的方法：
当我无法使用＆＃34;呼叫＆＃34;正如@Alexander O＆＃;; Mara所建议的那样，我需要jQuery加速测试并添加变量
var that = $(this)
到组件的最外层范围，这样我就可以从内部函数的范围访问组件本身，如下所示：
//Note that onUpdateParams now references "that" which is equal to "this" in the scope of the actual component.
TweenLite.to(theLuckyColors, time, {colorProps:{top:randomColor(colorSet), bottom:randomColor(colorSet)}, onUpdate:colorize, onUpdateParams:[that],onComplete:swirl});
这再次失败，所以我记录了＆＃34;这个＆＃34;到控制台，看到我实际上引用了组件的构造函数，而不是渲染的输出！
我再次看了docs并看到我可以使用名为＆＃34; refs＆＃34;的reactjs属性在每个渲染实例上引用渲染输出。我只需要为渲染元素提供一个＆＃34; ref＆＃34;属性：
render: function() {
return (
<a className="psychedelicon" ref="psicon" href={this.props.href} target={this.props.target} onMouseEnter={this.cycleColors} onMouseLeave={this.stopTheCycle}>
<i className={"fa fa-" + this.props.icon}></i>
</a>
)
}
并在我的方法中引用ref，我决定用完＆＃34; componentDidMount＆＃34;代替。
var that = React.findDOMNode(this.refs.psicon);
现在，每次我引用＆＃34;那＆＃34;我正在引用渲染元素本身（考虑到它在鼠标悬停时每隔.15秒重新渲染一次非常令人印象深刻）并且一切都很好！