[英]Create object from es6 and using in js file with openlayers map
i want to create own API, i created class and object with es6 and using javascript core. 我想创建自己的API,我使用es6和使用javascript核心创建类和对象。
when i ran this code with npm, got this error; 当我用npm运行此代码时,出现此错误; Uncaught ReferenceError: mapper is not defined
未捕获的ReferenceError:未定义映射器
Where do you think I get an error? 您认为我在哪里收到错误?
index.js; index.js; OpenLayers's function in code
OpenLayers在代码中的功能
import 'ol/ol.css';
import {Map, View} from 'ol';
import TileLayer from 'ol/layer/Tile';
import OSM from 'ol/source/OSM';
window.onload = config;
let mapper;
function config() {
mapper = new IMapper();
}
export class IMapper{
constructor(){
}
initMap () {
const map = new Map({
target: 'map',
layers: [
new TileLayer({
source: new OSM()
})
],
view: new View({
center: [0, 0],
zoom: 0
})
});
}
}
index.html; index.html的; called es6 code in js core and i got this error
在js核心中调用es6代码,我收到了这个错误
<html>
<head>
<meta charset="utf-8">
<title>Using Parcel with OpenLayers</title>
<style>
#map {
width: 400px;
height: 250px;
}
</style>
<script type="module" src="index.js"></script>
</head>
<body>
<div id="map"></div>
<script>
mapper.initMap();
</script>
</body>
</html>
package.json 的package.json
{
"name": "ol-parcel",
"version": "1.0.0",
"description": "Example using OpenLayers with Parcel",
"scripts": {
"start": "parcel index.html",
"build": "parcel build --public-url . *.html *.js"
},
"dependencies": {
"ol": "^5.1.2"
},
"devDependencies": {
"parcel-bundler": "^1.9.4"
}
}
Thank you for responses... 谢谢你的回复......
你需要实际调用你的config
功能。
window.onload = config();
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