ReactJS - 如何在同一页面中创建两个或多个组件 [英] ReactJS - how create two or more components in same page
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问题描述
我是 ReactJS 的新用户，我遇到了一点问题.我正在创建一个通用地图组件，它运行良好.但是，只能逐页渲染一个组件.我想改用 getElementById，我可以使用 getElementsByClassName.
I'm new user of ReactJS and I bumped in a point. I'm creating a generic map component, it works perfectly. However, only can render one component by page. I would like to instead use getElementById, I could use getElementsByClassName.
有可能吗?我想保留我的系统通用，我在同一页面中使用许多组件.
Is it possible? I would like to leave my system generic, where I use many components in same page.
在示例中，我使用渲染 1 个地图，但如果我想使用 2 个或更多地图?
In the example, I use to render 1 map, but if I want to use with 2 or more maps?
<div class="MyMap" comp-url="https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d3538.7513696363594"></div>
<div class="MyMap" comp-url="https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d322231313138.7513696363594"></div>
我想使用:
ReactDOM.render( React.createElement(MyMap, null) , document.getElementsByClassName('MyMap'));
带有 1 个地图示例的代码:
Code with 1 map example:
/******/ (function(modules) { // webpackBootstrap
/******/ // The module cache
/******/ var installedModules = {};
/******/ // The require function
/******/ function __webpack_require__(moduleId) {
/******/ // Check if module is in cache
/******/ if(installedModules[moduleId])
/******/ return installedModules[moduleId].exports;
/******/ // Create a new module (and put it into the cache)
/******/ var module = installedModules[moduleId] = {
/******/ exports: {},
/******/ id: moduleId,
/******/ loaded: false
/******/ };
/******/ // Execute the module function
/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/ // Flag the module as loaded
/******/ module.loaded = true;
/******/ // Return the exports of the module
/******/ return module.exports;
/******/ }
/******/ // expose the modules object (__webpack_modules__)
/******/ __webpack_require__.m = modules;
/******/ // expose the module cache
/******/ __webpack_require__.c = installedModules;
/******/ // __webpack_public_path__
/******/ __webpack_require__.p = "";
/******/ // Load entry module and return exports
/******/ return __webpack_require__(0);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/***/ function(module, exports) {
var MyMap = React.createClass({displayName: "MyMap",
getDefaultProps: function() {
return {
widthMap: 600,
heightMap: 450
}
},
getInitialState: function() {
return {
url: ''
}
},
componentWillMount: function() {
if ($('#MyMap').attr('comp-url') !== undefined) {
this.state.url = $('#MyMap').attr('comp-url');
}
this.setState({});
},
render: function() {
return (React.createElement("iframe", {src: this.state.url, width: this.props.widthMap, height: this.props.heightMap, frameborder: "0", allowfullscreen: true}));
}
});
ReactDOM.render( React.createElement(MyMap, null) , document.getElementById('MyMap'));
/***/ }
/******/ ]);<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://facebook.github.io/react/js/react.js"></script>
<script src="https://facebook.github.io/react/js/react-dom.js"></script>
</head>
<body>
<div id="a"></div>
<div id="MyMap" comp-url="https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d3538.7513696363594!2d-48.51497268432733!3d-27.508106824924692!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x952746f0c86515b1%3A0xe8ccb33700020efe!2sCorporate+Park!5e0!3m2!1spt-BR!2sbr!4v1448470435091"></div>
</body>
</html>推荐答案
你可以只从 getElementsByClassName 迭代结果:
You can just iterate the result from getElementsByClassName:
function renderEls(elements) {
for (var i = 0; i < elements.length; i++) {
if( $(elements[i]).attr('comp-url') !== undefined ) {
var url = $(elements[i]).attr('comp-url');
}
ReactDOM.render(<MyMap url={url} />, elements[i]);
}
}
renderEls(document.getElementsByClassName("MyMap"));
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