pdfh5

For large PDF files, use these modes to optimize memory and performance:

Lazy Loading

Set lazyLoad: true to only render pages that are currently visible in the viewport.

Progressive Loading

Enables streaming loading via PDF.js with intelligent memory management. Use these keys to tune performance:

• progressiveLoading (Boolean): Enable mode (default: false).
• chunkSize (Number): Chunk size in bytes (default: 65536).
• maxMemoryPages (Number): Maximum pages kept in memory before auto-cleaning distant pages (default: 5).
• maxImageSize (Number): Max image size in bytes (default: 8388608).
• canvasMaxAreaInBytes (Number): Max canvas area in bytes (default: 8388608).

pdfh5 supports different loading strategies based on file size to optimize performance:

• Small files: Loaded entirely at once.
• Medium files: Uses Lazy Loading (懒加载).
• Large files: Uses Segmented Loading (分段加载).

Priority Logic: If multiple modes are configured, the library follows this priority order: Segmented Loading > Lazy Loading > Traditional Loading.

For simple HTML projects, you can include pdfh5.js via a <script> tag. The plugin will automatically attempt to detect and load the necessary PDF.js resources.

1. Create a container div.
2. Include the script.
3. Instantiate Pdfh5 with the container and the pdfurl option.

<!-- 1. Create container -->
<div id="demo"></div>

<!-- 2. Include plugin -->
<script src="js/pdfh5.js"></script>

<!-- 3. Instantiate -->
<script>
var pdfh5 = new Pdfh5(document.querySelector("#demo"), {
    pdfurl: "./default.pdf"
});
</script>

To run linting and automatically fix style or syntax issues in the project, use the lint script.

npm run lint

If the standalone TypeScript plugin is slow, you can enable Volar's Take Over Mode. This makes the TypeScript language service aware of .vue types more efficiently by letting Volar handle both TS and Vue files.

Follow these steps in VS Code:

1. Disable the built-in TypeScript Extension:
   • Open the Command Palette (Ctrl+Shift+P or Cmd+Shift+P).
   • Run Extensions: Show Built-in Extensions.
   • Find TypeScript and JavaScript Language Features.
   • Right-click it and select Disable (Workspace).
2. Reload the window:
   • Open the Command Palette.
   • Run Developer: Reload Window.

To set up the vue3demo project, install the necessary dependencies using npm.

npm install

The react-test package is a React application bootstrapped with Create React App. You can manage the development lifecycle using the following Yarn commands in the project directory:

# Run the app in development mode at http://localhost:3000
yarn start

# Launch the test runner in interactive watch mode
yarn test

# Build the app for production in the `build` folder
yarn build

# Remove the single build dependency and copy all configuration files (webpack, Babel, etc.) into your project
# WARNING: This is a one-way operation and you cannot undo it.
yarn eject

To compile and minify the project for production deployment, use the build script.

npm run build

To use pdfh5 in modern JavaScript environments like Vue or React, install it via npm.

Important: Static Assets Setup After installing, you must manually copy the following directories/files from the pdfh5 package folder to your project's public static assets directory to ensure the PDF engine functions correctly:

• cmaps
• iccs
• standard_fonts
• wasm
• js/pdf.worker.min.js

npm install pdfh5

To ensure optimal development experience with Vue 3, TypeScript, and Vite, use VS Code with the following extensions:

1. Volar: The essential Vue language feature extension.
2. TypeScript Vue Plugin (Volar): To provide type information for .vue imports in TypeScript.

Note: If you are using Volar, you should disable the Vetur extension to avoid conflicts.