ngx-script-optimizer/fesm2022/ngx-script-optimizer.mjs.map

**A lightweight Angular library designed to supercharge your third-party script handling.**

{"version":3,"file":"ngx-script-optimizer.mjs","sources":["../../../projects/ngx-script-optimizer/src/lib/script-optimizer.component.ts","../../../projects/ngx-script-optimizer/src/public-api.ts","../../../projects/ngx-script-optimizer/src/ngx-script-optimizer.ts"],"sourcesContent":["import { DOCUMENT, isPlatformServer } from '@angular/common';\r\nimport { afterNextRender, ChangeDetectionStrategy, Component, EventEmitter, Inject, Injector, Input, OnDestroy, OnInit, Output, PLATFORM_ID } from '@angular/core';\r\n\r\ntype ScriptLoadingStrategy = 'eager' | 'lazy' | 'idle' | 'worker';\r\ntype ScriptAppendStrategy = 'body' | 'head';\r\ntype ScriptRenderStrategy = 'server' | 'client';\r\n@Component({\r\n  selector: 'ngx-script-optimizer',\r\n  imports: [],\r\n  template: ``,\r\n  changeDetection: ChangeDetectionStrategy.OnPush\r\n})\r\nexport class ScriptOptimizerComponent implements OnInit, OnDestroy {\r\n  constructor(\r\n    @Inject(DOCUMENT) private document: Document,\r\n    @Inject(PLATFORM_ID) private platformId: any,\r\n    private injector: Injector\r\n  ) { }\r\n\r\n  @Input() src?: string;\r\n  @Input() scriptContent?: any;\r\n  @Input() appendTo: ScriptAppendStrategy = 'head';\r\n  @Input() loadStrategy: ScriptLoadingStrategy = 'lazy';\r\n  @Input() renderStrategy: ScriptRenderStrategy = 'server';\r\n  @Input() contentType: string = 'text/javascript';\r\n  @Input() integrity?: string | any;\r\n  @Input() origin?: string | any;\r\n  @Output() onLoad = new EventEmitter<void>();\r\n  private worker?: Worker;\r\n  private scriptElem!: HTMLScriptElement;\r\n\r\n  ngOnInit(): void {\r\n    try {\r\n      if (isPlatformServer(this.platformId) && this.renderStrategy == 'server') {\r\n        this.addScriptToHead();\r\n      }\r\n      if(this.renderStrategy == 'client') {\r\n        afterNextRender(() => {\r\n          this.addScriptToHead();\r\n        }, {injector: this.injector})\r\n      }\r\n    } catch (error) {\r\n      console.error(error)\r\n    }\r\n  }\r\n\r\n  private addScriptToHead(): void {\r\n    if(!this.scriptContent && !this.src) {\r\n      throw new Error(\r\n        'ScriptOptimizerComponent: Either `src` or `scriptContent` must be provided.'\r\n      );\r\n    }\r\n    if(this.scriptContent && this.src) {\r\n      throw new Error(\r\n        'ScriptOptimizerComponent: Both `src` or `scriptContent` cannot be provided at the same time.'\r\n      );\r\n    }\r\n    if (this.loadStrategy == 'worker') {\r\n      if (typeof Worker !== 'undefined') {\r\n        if(this.scriptContent) {\r\n          this.createAndExecuteWorker(this.scriptContent)\r\n          return\r\n        }\r\n        throw new Error(\r\n          'ScriptOptimizerComponent: `scriptContent` must be provided.'\r\n        );\r\n      }\r\n      return\r\n    }\r\n    this.scriptElem = this.document.createElement('script');\r\n    this.scriptElem.type = this.contentType;\r\n    this.scriptElem.integrity = this.integrity;\r\n    this.scriptElem.crossOrigin = this.origin;\r\n    if (this.src) {\r\n      this.scriptElem.src = this.src;\r\n    }\r\n    if (this.scriptContent) {\r\n      this.scriptElem.text = this.scriptContent;\r\n    }\r\n    this.scriptElem.onload = () => {\r\n      this.onLoad.emit();\r\n    }\r\n    if (this.loadStrategy == 'eager') {\r\n      this.scriptElem.defer = false;\r\n      this.scriptElem.async = true;\r\n      this.appendScripts();\r\n    }\r\n    if (this.loadStrategy == 'lazy') {\r\n      this.scriptElem.defer = true;\r\n      this.scriptElem.async = true;\r\n      this.appendScripts();\r\n    }\r\n    if (this.loadStrategy == 'idle') {\r\n      this.scriptElem.defer = true;\r\n      this.scriptElem.async = true;\r\n      if (typeof window != 'undefined' && 'requestIdleCallback' in window) {\r\n        this.appendScripts();\r\n      }\r\n    }\r\n  }\r\n\r\n  private createAndExecuteWorker(scriptContent: string): void {\r\n    const blob = new Blob([scriptContent], { type: 'application/javascript' });\r\n    const workerUrl = URL.createObjectURL(blob);\r\n    this.worker = new Worker(workerUrl);\r\n\r\n    this.worker.onmessage = (event) => {\r\n      console.log('Message from worker:', event.data);\r\n      this.onLoad.emit();\r\n    };\r\n\r\n    this.worker.onerror = (error) => {\r\n      console.error('Error in worker:', error.message);\r\n    };\r\n  }\r\n\r\n  private appendScripts(): void {\r\n    if (this.appendTo == 'head') {\r\n      this.document.head.appendChild(this.scriptElem);\r\n    }\r\n    if (this.appendTo == 'body') {\r\n      this.document.body.appendChild(this.scriptElem);\r\n    }\r\n  }\r\n\r\n  ngOnDestroy(): void {\r\n    if (this.scriptElem && typeof document != 'undefined') {\r\n      document?.body?.removeChild(this.scriptElem);\r\n      document?.head?.removeChild(this.scriptElem);\r\n      this.worker?.terminate();\r\n    }\r\n  }\r\n\r\n}\r\n","/*\r\n * Public API Surface of script-optimizer\r\n */\r\n\r\nexport * from 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