我无法在MVC 5视图中通过react.net与react.net发起一个简单的onClick事件。我写的数据绑定和其他功能似乎工作正常。 我一直收到错误,说明警报是未定义的,但它只是一个简单的javascript警报,没有任何意义。请参阅下面的代码:
class ClickTest extends React.Component {
ClickMe(){
alert('the button was clicked');
};
render() {
return (
<div onClick={this.ClickMe()}>
Click Me
</div>
);
}
}
为我的组件生成的代码如下:
// @hash v3-241CABCC1541735262CAFE84D809779D00FA7D7B
// Automatically generated by ReactJS.NET. Do not edit, your changes will be overridden.
// Version: 3.2.0 (build 0e1da66) with Babel 6.7.7
// Generated at: 2017/11/10 12:00:58 PM
///////////////////////////////////////////////////////////////////////////////
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
var HomeComp = function (_React$Component) {
_inherits(HomeComp, _React$Component);
function HomeComp() {
var _Object$getPrototypeO;
var _temp, _this, _ret;
_classCallCheck(this, HomeComp);
for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
return _ret = (_temp = (_this = _possibleConstructorReturn(this, (_Object$getPrototypeO = Object.getPrototypeOf(HomeComp)).call.apply(_Object$getPrototypeO, [this].concat(args))), _this), _this.state = {
pc: _this.props.pc
}, _temp), _possibleConstructorReturn(_this, _ret);
}
_createClass(HomeComp, [{
key: 'render',
value: function render() {
return React.createElement(
'div',
null,
'Hello ',
this.state.pc
);
}
}]);
return HomeComp;
}(React.Component);
var ClickTest = function (_React$Component2) {
_inherits(ClickTest, _React$Component2);
function ClickTest() {
_classCallCheck(this, ClickTest);
return _possibleConstructorReturn(this, Object.getPrototypeOf(ClickTest).apply(this, arguments));
}
_createClass(ClickTest, [{
key: 'ClickMe',
value: function ClickMe() {
alert('the button was clicked');
}
}, {
key: 'render',
value: function render() {
return React.createElement(
'div',
null,
React.createElement(
'div',
{ onClick: this.ClickMe },
' Click Me '
)
);
}
}]);
return ClickTest;
}(React.Component);
答案 0 :(得分:0)
class ClickTest extends React.Component {
ClickMe(){
alert('the button was clicked');
};
render() {
return (
<div onClick={this.ClickMe.bind(this)}>
Click Me
</div>
);
}
}
ReactDOM.render(
<ClickTest />,
document.getElementById('container')
);
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<div id="container">
<!-- This element's contents will be replaced with your component. -->
</div>
使用范围'this'
绑定您的调用方法 <div onClick={this.ClickMe.bind(this)}>
Click Me
</div>
答案 1 :(得分:0)
您可以使用胖箭头进行自动绑定。
class ClickTest extends React.Component {
ClickMe = () => {
alert('the button was clicked');
}
render() {
return (
<div onClick={this.ClickMe}>
Click Me
</div>
);
}
}
错误也是,
您正在传递对您的功能的引用。 You should not call it。它应该是this.ClickMe
而不是this.ClickMe()