[英]Lazy loading component in React using IntersectionObserver and HTML <template> tag issue?
[英]Loading javascript tag into react component
我正在嘗試在react組件內加載Trading View窗口小部件。 我嘗試使用_dangerouslySetInnerHTML,但是它沒有運行javascript代碼。
我也試過這個:
import React from 'react';
export default class TradingView extends React.Component{
constructor(props){
super(props);
}
componentDidMount() {
const tradingViewCode = '<!-- TradingView Widget BEGIN --><script type="text/javascript" src="https://d33t3vvu2t2yu5.cloudfront.net/tv.js"></script><script type="text/javascript">new TradingView.widget({"autosize": true,"symbol": "BITFINEX:BTCUSD","interval": "D","timezone": "America/New_York","theme": "White","style": "1","locale": "en","toolbar_bg": "#f1f3f6","enable_publishing": false,"hide_top_toolbar": true,"save_image": false,"hideideas": true});</script><!-- TradingView Widget END -->';
new Function(tradingViewCode)();
}
render(){
return (
<noscript />
);
}
}
一種方法是像這樣在componentDidMount中將這些腳本元素創建並追加到<head>
中:
componentDidMount() {
var headElem = document.getElementsByTagName('head')[0];
var tradingWidgetSource = document.createElement('script');
tradingWidgetSource.type = "text/javascript";
tradingWidgetSource.src = "https://d33t3vvu2t2yu5.cloudfront.net/tv.js";
headElem.appendChild(tradingWidgetSource);
var tradingWidgetInitCode = document.createElement('script');
tradingWidgetInitCode.type = "text/javascript";
tradingWidgetInitCode.innerHTML = 'new TradingView.widget({"autosize": true,"symbol": "BITFINEX:BTCUSD","interval": "D","timezone": "America/New_York","theme": "White","style": "1","locale": "en","toolbar_bg": "#f1f3f6","enable_publishing": false,"hide_top_toolbar": true,"save_image": false,"hideideas": true});';
headElem.appendChild(tradingWidgetInitCode);
}
不確定您的_dangerouslySetInnerHTML代碼是什么,但之前已在render()中使用它來實現相似的目標; 通常會將JS dangerouslySetInnerHTML
將InnerHTML設置為<script>
元素:
render(){
<div>
<script dangerouslySetInnerHTML={{ __html: MyJSCodeAsString }}></script>
</div>
}
從理論上講,應該能夠執行以下操作:
render(){
<div>
<script type="text/javascript" src="https://d33t3vvu2t2yu5.cloudfront.net/tv.js" />
<script type="text/javascript" dangerouslySetInnerHTML={{ __html: 'new TradingView.widget({"autosize": true,"symbol": "BITFINEX:BTCUSD","interval": "D","timezone": "America/New_York","theme": "White","style": "1","locale": "en","toolbar_bg": "#f1f3f6","enable_publishing": false,"hide_top_toolbar": true,"save_image": false,"hideideas": true});' }}></script>
</div>
}
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