I am looking to use map() to iterate over and add to my DOM in react, however, my DOM is not updating.
I think the everything is syntactically written ok, so I am really stumped by this. Any help you can give me I'd really appreciate, thanks.
App.js
class App extends Component {
...
searchThis() {
axios.get("/getYoutube", {params: {searchString: this.state.searchVal}}).then(({ data }) => {
this.setState({
youtubeVids: data.resp.items
})
})
}
render() {
if (this.state.youtubeVids.length > 0) {
console.log(this.state.youtubeVids[0].snippet.thumbnails.default.url)
return (
<div className="app-container">
<div className="app-header">
<h1>YouTube API App</h1>
</div>
<div className="app-body">
<div className="each-body-section">
<SearchResults
youtubeVids = {this.state.youtubeVids}
/>
</div>
</div>
</div>
);
}
}
}
export default App;
Right now I am bringing server api results into the frontend using setState() and Axios through the searchThis() method, which I am logging and seeing successfully in my console from my props. However in SearchResults.js, nothing is updating in the DOM SearchResults.js
import React from "react";
const SearchResults = props => {
console.log("props in search ", props.youtubeVids)
return (
<div className="each-body-section video-container">
{props.youtubeVids.map((video) => {
<div key={video.id.videoId}>
<div className="video-title">
<h2>{video.snippet.title} </h2>
</div>
<div>
<img src={video.snippet.thumbnails.high.url} />
</div>
<div>
<p>{video.snippet.description}</p>
</div>
</div>
})}
</div>
)
}
export default SearchResults
Well, its because you are trying to map an empty array in SearchResults.js
Change SearchResults.js to the code below and try again:
import React, { Component } from 'react';
class SearchResults extends Component {
render() {
console.log(this.props.youtubeVids);
if (this.props.youtubeVids.length > 0) {
var youtubeVidsMap = this.props.youtubeVids.map((video) => <div key={video.id.videoId}>
<div className="video-title">
<h2>{video.snippet.title} </h2>
</div>
<div>
<img src={video.snippet.thumbnails.high.url} />
</div>
<div>
<p>{video.snippet.description}</p>
</div>
</div>);
}
return (
<div className="each-body-section video-container">
{youtubeVidsMap}
</div>
);
}
}
export default SearchResults;
If you want to use stateless component, the code below should work:
import React from "react";
const SearchResults = props => {
if (props.youtubeVids.length > 0) {
var youtubeVidsMap = props.youtubeVids.map((video) => <div key={video.videoId}>
<div className="video-title">
<h2>{video.snippet.title} </h2>
</div>
<div>
<img src={video.snippet.thumbnails.high.url} />
</div>
<div>
<p>{video.snippet.description}</p>
</div>
</div>);
}
return (
<div className="each-body-section video-container">
{youtubeVidsMap}
</div>
)
}
export default SearchResults
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