61 lines
1.7 KiB
TypeScript
61 lines
1.7 KiB
TypeScript
import type {
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SgsMapSDKConstructor
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} from '@/types/sgs-map-sdk'
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let loadingScriptUrl = ''
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let loadRequest: Promise<SgsMapSDKConstructor> | null = null
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const findExistingScript = (scriptUrl: string) => (
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Array.from(document.scripts).find((script) => script.src.endsWith(scriptUrl) || script.getAttribute('src') === scriptUrl)
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)
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export const loadSgsMapScript = (scriptUrl: string): Promise<SgsMapSDKConstructor> => {
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if (typeof window === 'undefined' || typeof document === 'undefined') {
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return Promise.reject(new Error('SGS Map SDK 只能在 H5 浏览器环境中加载'))
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}
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if (window.SGSMapSDK) {
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return Promise.resolve(window.SGSMapSDK)
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}
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if (loadRequest && loadingScriptUrl === scriptUrl) {
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return loadRequest
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}
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loadingScriptUrl = scriptUrl
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const request = new Promise<SgsMapSDKConstructor>((resolve, reject) => {
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const existingScript = findExistingScript(scriptUrl)
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const script = existingScript || document.createElement('script')
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const resolveLoadedSdk = () => {
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if (!window.SGSMapSDK) {
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reject(new Error('SGS Map SDK 脚本已加载，但未发现 window.SGSMapSDK'))
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return
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}
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resolve(window.SGSMapSDK)
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}
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script.addEventListener('load', resolveLoadedSdk, { once: true })
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script.addEventListener('error', () => {
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reject(new Error(`SGS Map SDK 脚本加载失败: ${scriptUrl}`))
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}, { once: true })
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if (!existingScript) {
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script.src = scriptUrl
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script.async = true
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document.head.appendChild(script)
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return
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}
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if (window.SGSMapSDK) {
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resolveLoadedSdk()
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}
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}).finally(() => {
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loadRequest = null
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})
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loadRequest = request
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return request
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}
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