解決方案：url前面一定要加http://
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Uncaught (in promise) DOMException: Failed to execute 'open' on 'XMLHttpRequest': Invalid URL
Uncaught (in promise) DOMException: Failed to execute 'open' on 'XMLHttpRequest': Invalid URL
vue 運行項目時，Uncaught (in promise) DOMException: Failed to execute 'open' on 'XMLHttpRequest': Invalid URL
vue——DOMException: Failed to execute 'open' on 'XMLHttpRequest': Invalid URL 未能在“xmlhttpRequest”上執行“open”：無效的URL
DOMException: Failed to execute 'open' on 'XMLHttpRequest': Invalid URL 未能在“xmlhttpRequest”上執行“open”：無效的URL。
報錯:request:fail Failed to execute 'open' on 'XMLHttpRequest': Invalid URL
mui.min.js:7 Uncaught DOMException: Failed to execute 'send' on 'XMLHttpRequest': Failed to load
Uncaught (in promise) DOMException: Failed to execute 'postMessage' on 'Window': An object could not be cloned.
Uncaught DOMException: Failed to execute 'removeChild' on 'Node': The node ……
Uncaught DOMException: Failed to construct 'WebSocket': The URL