angular:7.1.4
我试图解决加载脚本的问题,因为我给出了错误的 Uncaught TypeError: Can not read property
响应不确定的"。我发现了一种可能的解决方案,该解决方案是创建一个动态加载脚本的服务。我遵循教程,并为此做了一切,但它行不通。
import { Injectable } from '@angular/core';
interface Scripts {
name: string;
src: string;
}
export const ScriptStore: Scripts[] = [
{ name: 'jquery', src: 'https://code.jquery.com/jquery-3.3.1.min.js' },
{ name: 'tables', src: '../../../assets/dashboard/js/tables.js' },
{ name: 'widgets', src: '../../../assets/dashboard/js/widgets.js' },
{ name: 'charts', src: '../../../assets/dashboard/js/charts.js' },
{ name: 'theme.min', src: '../../../assets/dashboard/dist/js/theme.min.js'}
];
declare var document: any;
@Injectable()
export class DynamicScriptLoaderService {
private scripts: any = {};
constructor() {
ScriptStore.forEach((script: any) => {
this.scripts[script.name] = {
loaded: false,
src: script.src
};
});
}
load(...scripts: string[]) {
const promises: any[] = [];
scripts.forEach((script) => promises.push(this.loadScript(script)));
return Promise.all(promises);
}
loadScript(name: string) {
return new Promise((resolve, reject) => {
if (!this.scripts[name].loaded) {
//load script
let script = document.createElement('script');
script.type = 'text/javascript';
script.src = this.scripts[name].src;
if (script.readyState) { //IE
script.onreadystatechange = () => {
if (script.readyState === "loaded" || script.readyState === "complete") {
script.onreadystatechange = null;
this.scripts[name].loaded = true;
resolve({script: name, loaded: true, status: 'Loaded'});
}
};
} else { //Others
script.onload = () => {
this.scripts[name].loaded = true;
resolve({script: name, loaded: true, status: 'Loaded'});
};
}
script.onerror = (error: any) => resolve({script: name, loaded: false, status: 'Loaded'});
document.getElementsByTagName('head')[0].appendChild(script);
} else {
resolve({ script: name, loaded: true, status: 'Already Loaded' });
}
});
}
}
然后,我尝试在INIT的INT上调用此服务以加载脚本
ngOnInit() {
this.loadScripts();
}
private loadScripts() {
// You can load multiple scripts by just providing the key as argument into load method of the service
this.dynamicScriptLoader.load(
'jquery',
'tables',
'widgets',
'charts',
'theme.min'
)
.then(data => {
console.log('scripts loaded')
}).catch(error => console.log(error));
}
我使用此服务时遇到的错误是几个,除了继续存在与以前相同的错误之外,其他错误还显示为文件图表中的 Failed to load resource: the server responded with a status of 404 (Not Found)
, Uncaught ReferenceError: c3 is not defined
等。我可能会从这项服务中打错电话,因为我看到了一些看起来不错的教程。
好吧..我重新编码了许多HTML,并且可能是两次调用一些脚本JS ..